NASA's New X-Ray Telescope Is A Revolution in Astronomy and Launch Profiles

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NASA's new Imaging X-Ray Polarimetry Explorer spacecraft is a tiny satellite with the unique ability to capture images in X-ray with polarization and timing information for every photon captured. It's designed to operate for 2 years and capture new scientific measurements of some of the most extreme places in the universe with gravitational and magnetic fields that would destroy ordinary matter.
And in an interesting turn of events the satellite switched from the intended launch vehicle to a cheaper option that nobody considered - the Falcon 9. This is the first time we've seen a rocket lauched from a domestic US launch site perform such a large plane change maneuver to reach a target orbit. SpaceX normally launch satellites 10 times more massive, but this tiny satellite opened up new options and allowed this unique launch profile.
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8 дек 2021

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Комментарии : 736

@peter4210 2 года назад

Other space launch service: we will use many maneuvers to reach orbit efficiently. Space X being your average KSP player: so i just started blasting

@unitrader403 2 года назад

Not enough Power? Moar Boosters! Vehicle starts disintegrationg on Launch? More Struts! rinse and repeat till it works :D

@LaggerSVK 2 года назад

this is basically how I was changing orbital planes in orbiter also. When I was beginner and my rInc was like 10 degrees :D

@audigex 2 года назад

The more I see from SpaceX, the more convinced I am that they’re KSP players

@ElDJReturn 2 года назад

I laughed way too hard at this :D

@viceice 2 года назад

I suppose this is one of the benefits of having a reusable vehicle. Once you pay for the launch, fuel is a negligible cost, and if you have the payload capacity for it you can just brute force your way to the correct orbit. As opposed to the traditional way where you are literally paying by the gram and you want to launch the lightest payload possible.

@hannesgroesslinger 2 года назад

Imagine being the engineer who spent thousands of hours developing and testing that unfolding boom assembly so that you could fit this relatively large telescope into a tiny amount of space, and then somebody shows you the picture of the satellite inside the F9 fairing.

@FredPlanatia 2 года назад

yeah, but as an engineer you do your job to solve the problem posed to you, and its gratifying to come up with a solution. I'm sure its an odd feeling that the satellite has so much room now but probably the engineers are more relieved that the satellite got launched instead of experiencing further delays due to Pegasus.

@higueraft571 2 года назад

To be fair, it's still likely needed, since you dont want it to snap in-flight

@Hewitt_himself 2 года назад

I'm sure sure they were like, what else can we fit onto it now, before they were told no budget for anything else.

@darkfur18 2 года назад

"Damn, should've made a bigger unfolding boom assembly, with more focusing elements"

@jgottula 2 года назад

As others have said, it’s likely still necessary for it to be initially collapsed, primarily I would assume for structural rigidity reasons (particularly during the G-forces of launch). If they’d had the luxury of designing it with F9’s mass-to-orbit and fairing volume in mind from the start, I imagine they could quite likely have simply made a (much beefier/sturdier/heavier) fixed boom structure that would be sufficiently strong *and* wouldn’t need to be deployed. But, it is what it is. 🤷‍♂️ Redesigning it by that point would almost definitely not have been worth the added cost, revalidation work, etc. (I agree that it probably sucks a little to be on the team that designed it the original way; but what can you do. 😬)

@zoltankurti 2 года назад

They went full ksp and decided that my efficiency in launching with regards to delta v is more than enough...

@loganosmolinski4446 2 года назад

Boop

@youluvana 2 года назад

Well, time is money. Maybe they want to use the same rocket again soon.

@mattdill1219 2 года назад

“He went full Kerbal.. ..you never go full Kerbal.”

@Yrouel86 2 года назад

As an Italian I'm really happy Italy had an important contribution to this mission

@therealfranz 2 года назад

Stavo cercando questo commento. Sono veramente orgoglioso di essere italiano in questo momento. Con ixpe e con dart l'ASI si sta facendo sentire nel mondo anche se piccola

@limiv5272 2 года назад

As an Italian, do you know the relationship between your country's space agency and ESA? Just curios

@therealfranz 2 года назад

@@limiv5272 ASI (Italian space agency) is part of ESA. ESA it's like the European Union but with space agencies. The ASI can make autonomous missions collaborating with other space agencies like DART. The main thing is that astronaut all flyes under ESA

@limiv5272 2 года назад

@@therealfranz That makes sense, thanks

@jull1234 2 года назад

I'd love SpaceX to add a KSP style G-meter to the hud.

@monkeyanimationandgaming 2 года назад

This launch should have had the full KSP hud, would have been hilarious

@MartiensBezuidenhout 2 года назад

@@monkeyanimationandgaming 🤣 Hilarious indeed, you should tweet that at Elon asap! 🤔

@snygg1993 2 года назад

They need the Kerbals in the lower right corner! ... even if no one is in the rocket ... f--- it, just put three green images on the screen and let them black out.

@guzmaekstroem 2 года назад

Those SpaceX streams would benefit greatly from G-force indicator alongside the speed and altitude. Anyways thx Scott for the vijeo.

@Sebazzz1991 2 года назад

Suggest it to them. On popular request they have added first stage telemetry after stage separation.

@TimNeumann 2 года назад

I agree! That would be soo cool! Let's spam the chat on the next launch :D

@Sebazzz1991 2 года назад

In this case it might reveal commercially sensitive information.

@w0ttheh3ll 2 года назад

@@Sebazzz1991 Hardly. In most cases it's easy to calculate acceleration from the data they already show (though this inclination change is a counterexample where it doesn't work).

@eigentensor 2 года назад

You can mentally estimate it using g = 10m/s^2 instead of 9.8 or whatever, so take your estimate of how many m/s it's increasing per second and drop the last digit. Whabam

@danielbrown5682 2 года назад

I can’t believe that we just get to learn all this knowledge, here for free. Don’t think I’ll ever use it, but I love learning it, thanks Scott!

@russc788 2 года назад

I feel like RU-vid video give a brief grounding, but the real deep knowledge is in textbooks and more active learning.

@AccAkut1987 2 года назад

@@russc788 ofc, tho I think Scott makes these more "high level" than your typical science channel.

@justinweatherford8129 2 года назад

@@AccAkut1987 that is because the science channel is made to accommodate children.

@MonkeyJedi99 2 года назад

@@justinweatherford8129 Yeah. The Science Channel gave up being about science years ago. Much like the History Channel gave up on history, and TLC gave up on learning.

@mdalabs 2 года назад

and get this: i'm paying 9.6k for an aerospace degree to learn less things than on his channel

@larph7270 2 года назад

You can always count on Scott to bring new information on a launch/mission that you weren't aware of!

@24HoLTeam93 2 года назад

I love the small explorer missions that were planned for teeny little fairings that end up on a Falcon 9. TESS and DART were similarly sized to IXPE. I think TESS was supposed to be on a minotaur. DART was planned to be a secondary payload initially. Makes you hopeful for what the small explorer missions just starting planning now will do, now that they can count on a huge fairing and cheap launch price.

@ChillGuy511 2 года назад

And imagine starship!

@madcio 2 года назад

"Makes you hopeful for what the small explorer missions just starting planning now will do" Not much beyond somewhat simpler design and deployment.

@danieljensen2626 2 года назад

@@ChillGuy511 I'm pretty sure starship is going to be the best thing to ever happen for space telescopes.

@michaelbuckers 2 года назад

@@danieljensen2626 If they develop the booster such that it can be converted into a space station module, by the same technology it could be converted into a telescope.

@johnbuchman4854 2 года назад

@@michaelbuckers Look at Saturn IVB and Skylab.

@andyabajo 2 года назад

Can we say and verify that this is the "highest" and "fastest" drift a man-made vehicle ever! Seriously, I was watching the stream and looking at the trajectory animation and noticed that the path suddenly veers sharply towards the equator!

@Ithirahad 2 года назад

Also the hardest left turn anybody ever made :P

@user-bw6jg4ej2m 2 года назад

@Cancer McAids IIRC, modern fighter jets on full afterburner can make sustained turns of around 5-6 G (compared to brake turns of 9-10 G that bleed off speed quickly) for minutes.

@TlalocTemporal 2 года назад

@@user-bw6jg4ej2m -- Would that be considered a drift though? Drifting/powersliding is usually defined by a wheeled vehicle loosing traction with the ground and applying acceleration in a different direction to their motion. That manoeuvre is trivial in a spacecraft (any normal or radial burn would probably count), but an airplane would need to be in a stall or a sustained skidding turn, no?

@Ithirahad 2 года назад

@Cancer McAids I mean in terms of the speeds and distances involved, but yeah ultimately you're right.

@user-bw6jg4ej2m 2 года назад

@@TlalocTemporal I wasn't responding to the original message about drift, but to the reply about hard turns in aircraft. But good point nonetheless! Yeah, for aircraft I think only some high angle-of-attack manoevres (cobra and the like) could count as that. As well as post-stall capabilities of thrust-vectored fighters.

@snygg1993 2 года назад

The comparison of the Pegasus *XL* vs. Falcon 9 fairing is the best 😂

@loganthomas1685 2 года назад

I'm a space news junkie and I look forward to every video Scott Manley drops. No one is gonna give you the insight like he does. Big props ❤️❤️❤️❤️

@rpavlik1 2 года назад

So I bet satellite launch customers really appreciate being able to have video feeds of their deployment. SpaceX insurance probably does too. "Hey we did our part right, see?"

@limiv5272 2 года назад

I'm not sure how much info it adds besides being cool, they definitely have sensors for everything. Ever notice how some things, like fairing separation, are announced before we actually see it?

@rpavlik1 2 года назад

@@limiv5272 yes, there are sensors, as well as "tape delays" on video. Perhaps most satellites don't have such a complicated deployment process, but for instance I'd be surprised if each joint in that boom was instrumented.

@SecularMentat 2 года назад

This is the most KSP maneuver node level physics ever.

@speedingoffence 2 года назад

Although any KSP player would have just launched the rocket north.

@psmirage8584 2 года назад

When I was watching the launch, and it lit up the second stage to do that "power slide" I was thinking, "What the h--- is going on, here?" Engine is running, but the vehicle isn't speeding up. "Maybe the telemetry was off." I absolutely loved this explanation.

@zett5729 2 года назад

Calling it a Powerslide was a big mistake... now I really want to see an edit of its trajectory change with the Tokyo Drift Music :)

@unitrader403 2 года назад

i would favour Deja Vu as Soundtrack!

@Rasty1989 2 года назад

Ah yes, the (not-so) famous Broglio Space Center on an offshore rig in Kenya!

@alvarp3576 2 года назад

Actually the launch platform in the picture (named San Marco) is just a part of the Broglio Space Center that includes also other 2 offshore control platforms (Santa Rita 1,2) and the real space center based on the land near Malindi. I'm not sure Scott yet told everybody the incredible story of Luigi Broglio and the early Italian space program...

@viliamklein 2 года назад

I came down to Ft. Lauderdale yesterday for some ZeroG flights. I saw the launch Livestream pop up on RU-vid last night, and as the rocket went southerly instead of northerly for this launch, I went outside to watch. I didn't catch stage separation but I could see the red glow of the second stage and the change in the plume caused by the faring separation!! Incredible!

@DaveChimny 2 года назад

When I watched the stream this morning (Germany), I wondered if that was a usual maneuvre, when they showed the bend in the track - I've never seen something like that before and I also thought how an equatorial orbit can be done from Florida. Thanks for clearing that up for me. 😊

@whuzzzup 2 года назад

> I've never seen something like that before Found the person who did not play enough KSP.

@DaveChimny 2 года назад

@@whuzzzup Better: You found the person who never played KSP, ever.

@MrMediator24 2 года назад

6:44 Remember - Hexagons are the Bestagons

@ImieNazwiskoOK 2 года назад

James Webb Space Telescope approved

@jonharson 2 года назад

@@ImieNazwiskoOK More like "This post approved by the NRO"

@riotintheair 2 года назад

Got to love a plane change in low orbit. Definitely taking advantage of the satellites low mass for that.

@PMX 2 года назад

9:15 Actually, you even get to see it fully deploy the solar panels a bit later, right before it goes off screen, at about T+00:34:45 on the official Space X stream

@AliShuktu 2 года назад

*Actually the "light scatter" could be added after in Photoshop for more "exhibition presentation stage effect".* I have been told few times to do same exact thing to "show the light" back in the day.

@PolluxPavonis 2 года назад

Thank you for these videos, Scott, so informative and well put together. Cheers.

@infinitumneo840 2 года назад

The background radiation even on an equatorial orbit has to create a lot of noise in the data. I do like the power slide analogy; it was epic to watch.

@julese7790 2 года назад

Press F to pay respect to the ice chunk at 0:40 . Instavaporisation is hard ! :) Excellent video !

@hjalfi 2 года назад

I didn't see that --- it's amazing! The shortest lived comet in the solar system!

@robertbutsch1802 2 года назад

So was this really as simple as flying to the equator, making a sharp “handbrake turn” left, and just blasting away? The burn had to (1) accomplish a plane change (23 deg incl to 0 deg incl) and (2) raise and circularize the orbit from the initial elipse with a very low perigee. Plane changes are done at the ascending/descending nodes (where the current orbit crosses the equator). I suspect they had to calculate the burn time and spacecraft orientation pretty carefully to accomplish all this within the performance limits of Falcon 9, but then maybe propellant was not a limiting factor since the payload was such low mass? If the latter was the case I would have thought they could have landed the booster back at the Cape.

@speeddemon1092 2 года назад

Likely they traded RTLS for additional upper stage performance. Keep in mind, the less the booster throws the 2nd stage the more it has to burn to make up for it, and RTLS inherently requires a weaker 2nd stage throw. By going for a Barge landing with such a light payload, it frees up additional upper stage dV to make the plane change burn.

@Daniel-yy3ty 2 года назад

he did say 60 seconds pulling 6g, if those numbers are right that's around 3.5 km/s of dV that's basically a full geostationary mission, and they never returned to launch with any of those (granted, the lightest payload was still 3t, but even DART landed on a drone) keep in mind that the upper stage has a dry mass of 4.5t, below a certain mass the payload doesn't matter much :D (edited the dry mass, I used the wrong one)

@niekbergboer 2 года назад

@@Daniel-yy3ty Indeed, that is also why they had to have the first stage accelerate the stack up to over 8000 km/h and to have it perform a drone-ship landing. Had this been a launch into the same inclination as the launch site, they would have accelerated up to perhaps 1.5 km/s, and they would have performed a return-to-launch-site landing.

@stuartgray5877 2 года назад

They also had to release us with basically ZERO rates about all three axes at separation. Something that SpaceX struggled with meeting the requirements for such a small payload.

@outlawbillionairez9780 2 года назад

NASA... "We hope this launch will distract you from the fact that the James Webb Telescope is still on the planet Earth!"

@hydewhyte4364 2 года назад

Fun fact ... the Webb build started in 2004 ... the last Hubble service mission was 2009 ... so there are parts on the Hubble younger than parts of the Webb.

@EnglishMike 2 года назад

JWST is a much more ambitious mission. As long as it gets up in one piece, they can take all the time they need to make sure to get it right.

@hydewhyte4364 2 года назад

@@EnglishMike Hubble passed 31 years in orbit ... and resumed service yesterday after it's latest issue. The Webb is slated for 6.5 years of service ... which knowing the people who work on these teams we can expect to see double. The hard thing is that if SpaceX can get the Starship operating, they can get to Hubble and give it another 30 years. Once Webb starts to fail ... there's no getting better. Much of the Webb design and parts are already decades old. For the cost they could put up 4 Hubbles.

@KnightRanger38 2 года назад

@@hydewhyte4364 It might be more accurate to say that Hubble has some parts that were added more recently than some parts on Webb. The parts replaced on STS 125 themselves might be older than the ones on Webb, but the initial cancellation of the fifth servicing mission post=Columbia delayed that mission several years.

@MartiensBezuidenhout 2 года назад

@@hydewhyte4364 🤯

@tthinker9387 2 года назад

Graphics are phenomenal! I'm pretty sure that you don't have the time to create all these clips and graphics, so you must be finding them - and that means lots of searching. I am so impressed at the results; I am also impressed at your ability to explain complex scientific concepts in easy-to-understand ways. Thank you (immensely).

@branscombeR 2 года назад

Seconded! 🇦🇺

@XJapa1n09 2 года назад

Thirded!

@donsmith717 2 года назад

Fourthed.

@stuartgray5877 2 года назад

ALL of the people that built the spacecraft breathed a HUGE sigh of relief when we saw the arrays deploy. Then the transmitter came on and the ground station locked up on it and got a command in within minutes of separation.

@Wm.Havens 2 года назад

Scott you have done so much to educate and inform us thank you!

@theheresiarch3740 2 года назад

But are they doing a sick kickflip with it?

@outlawbillionairez9780 2 года назад

It started as a truck grind...

@klosskopfder1.762 2 года назад

So they developed a presumably very complex extending boom, switched the rocket and could have just used a stick the same length. Also: That is a really cool sensor. It sounds kind of like a tech demonstrator for a more expensive mission

@ivoivanov7407 2 года назад

That stick have to be very strong, to dampen the vibrations during the launch. Maybe this is the reason they used extending boom.

@AnthemAnimation 2 года назад

@@ivoivanov7407 just add some struts

@ivoivanov7407 2 года назад

@@AnthemAnimation Indeed! ;)

@ozzymandius666 2 года назад

Except the fact that it is impossible to measure both the energy and time of arrival of a photon. The uncertainty principle forbids it.

@SebastianSchleussner 2 года назад

@@ozzymandius666 No, it sets a limit to the product of the precisions of the two, nothing more, nothing less.

@jacobhuggins 2 года назад

Loved watching this last night! Watching the satellite open up a bit was not expected. Too cool! Thanks for the extra info!

@heydj6857 2 года назад

brilliant as always, so informative and enjoyable to watch, thank you so much scott.

@stuartgray5877 2 года назад

I helped build, test and Launch the IXPE spacecraft. It was my sixth being on the Launch team after Mars Global Surveyor, Stardust, Deep Impact, Kepler Space Telescope, and JPSS-1 (now NOAA-20). I was part of the Missions Operations teams on Deep Impact, Kepler, and NOAA-20. You may ask me any questions you like about any of those spacecraft.

@epincion 2 года назад

Thanks, that boom extension device looks very wobbly and so how do you get a stable and accurate focus from the mirror to the detector ?

@stuartgray5877 2 года назад

@@epincion the boom is actually very rigid once it "snaps" into place. Then there is a tip, tilt, rotate mechanism for fine adjustment after deployment

@epincion 2 года назад

@@stuartgray5877 Thanks - I thought it must be the case but that extension process I saw in the film makes it look like a piece of cooked spaghetti. Congrats on building it.

@bigjay875 2 года назад

Love hearing space news from you keep up the good work

@michaeljohn5175 2 года назад

I haven't heard anyone comment on the solar panels completing their deployment just before the craft went out of view. That was just as spectacular as their initial deployment.

@islammohamed1441 2 года назад

Great explanation! Now I understand the IXPE function much better.

@kermitface4602 2 года назад

LOVE YOUR VIDEOS SCOTT!

@hp127 2 года назад

Thanks for the information. Great as always,

@Xtreme117Gamer 2 года назад

Actually, quick correction, the South Atlantic Anomaly (SAA) exists not because the magnetic field is weaker but because it is tilted relative to the spinning axis of the earth and not centered on the Earth's geometrical center (if there is such a thing). And because the magnetic field is rotating with the Earth, the zone where the radiation belts intersect the most the atmosphere is always in the same place : over the South Atlantic region. Not sure if I'm being clear and since an illustration is worth a thousand words, here is one (see Position and Shape section) : www.wikipedia.org/wiki/South_Atlantic_Anomaly Otherwise always great videos !

@georgiosrinakakis934 2 года назад

Thank you for this video, I love the way you explain things

@Ravenscaller 2 года назад

The final image goes on one or two seconds longer as ESPY completely unfolds it wing like solar panels as a fledgling bird that's just discovered it's element, opens it wings and flies away. For me it was a touching moment.

@StephanieB67 2 года назад

G'day Scott. Really enjoy your take on the rocket industry. Also, it's good to see your comments on the NASASpaceflight live stream chats. Cheers 🍻!

@AndyFoster405 2 года назад

Very cool. Learned a lot - thanks for this video!

@belgarion0013 2 года назад

Very good video as usual! Interesting satallite, launch and staging of it.

@frankgulla2335 2 года назад

A terrific video and a great surprise ending. Thank you, Scott.

@jeffwygum3032 2 года назад

Nice review, thanks!

@eddysaldana8403 2 года назад

Sometimes the topic of ur video doesn’t grab my attention but I make myself watch it. I have never been disappointed. Thank you.

@SomeGuy-ne3yl 2 года назад

Very informative. Thanks!

@slimj091 2 года назад

I love it when Scott talks about Midors.

@61Ldf 2 года назад

Very comprehensive video.

@carlatteniese2 2 года назад

Fascinating! Thanks, Scott!

@clarencehopkins7832 2 года назад

Excellent stuff bro

@reformCopyright 2 года назад

Bah, we do inclination changes like that in Kerbal Space Program every day!

@mikeehrmantraut2607 2 года назад

great content, as always

@ismailnyeyusof3520 2 года назад

Excellent commentary Scott, I learned so much from you about the IXPE mission in this 11 minutes 46 secs video, especially why the satellite has a long boom to focus the x-rays its three telescopes are designed to detect.

@homecrush4063 2 года назад

You know why I like watching your videos? The knowledge and research you put into your videos is pretty impressive. Some fantastic content!

@ExplicitPublishing 2 года назад

Great video. Thx!

@user-cq4ge5jn1u 2 года назад

Considering the size of the fairing and the fact that the rocket was way overpowered, they could use a rigid truss instead of that unfolding beam, have thay known what their LV would be from the beginning

@stuartgray5877 2 года назад

but the mass of a rigid boom would have been too heavy. They did not have a whole lot of mass margin for the payload.

@xbxb 2 года назад

Who ever knew they did something unusual maneuver this time. Thanks Scott!

@lukasskymuh5910 2 года назад

Great insight Scott. If you are looking for a interesting topic for a future video check: Laser communication. Already 20 years in orbit (silex) and now it is becoming realy a big thing for constellations.

@ShelburneCountry 2 года назад

Why was the water Deluge so late? Seems like someone forgot a button there.... should be water first - flame second

@thePronto 2 года назад

Falcon 9 had taken control of the countdown. So it was Jeb's fault...

@TheEvilmooseofdoom 2 года назад

It seemed to be on time when I watched. Water first, flames second.

@howardjohnson2138 2 года назад

Hi Scott! That's fascinating and I'd not heard of it. Thanks

@bearlemley 2 года назад

Thank you Scott

@AndySpicer 2 года назад

I love the way you say mirrors. Makes me smile every time.

@jdjeep98 2 года назад

"massive handbrake turn" LOL What a great description!

@xrayaiz74 2 года назад

Thanks for the explanation of the purpose of the satellite. You have an excellent voice for science documentary. I would love to see you on the Discovery channel explaining some space phenomena for a layman such as myself. Great diagrams and pictures regarding the early research and development of the x-ray technology that went into iXPE.

@Ranstone 2 года назад

I'm getting giddy thinking about the James Webb this month...

@xxxdiresaintxxx 2 года назад

Fun times, thanks Scott

@wattsmichaele 2 года назад

The details of this science experiment makes my head explode.😎

@kothejunglist 2 года назад

My elementary understanding of optics makes me excited about the tech invented to capture EMR of different energies. Mirrors and angles have never seemed so interesting

@areliablesource2848 2 года назад

I gotta tell you, I really look forward to your intro's and outtro's.

@hydewhyte4364 2 года назад

outros.

@areliablesource2848 2 года назад

@@hydewhyte4364 Thanks, I will correct my comment.

@Liverpoolfan08 2 года назад

I saw your twitch stream and you were wondering what that Japanese space tourist was holding in the capsule, it was a switch box to switch onboard cameras. The had put cameras inside the capsule and that’s why he had a box in his hand to switch cameras and audio. Well that’s what I think because Yusaku Maezawa went up with his friend who is going to film him up there and take photos.

@ananttiwari1337 2 года назад

this is pretty awesome

@modrarybivrana5654 2 года назад

as always, interesting

@vicpinto1970 2 года назад

Watching that hand brake turn in real time was awesome.

@oldman8268 2 года назад

Scott, sorry to see you didn’t get that phone call. Astronaut Manley!

@atungaanassi4521 2 года назад

Proud to see Kenya contributing to advancements within the Space industry. Interested to see where their new Spaceport will end up!

@oldbloke135 2 года назад

I think this was one of the best launch and deployment videos I've seen. The weather was ideal for them to follow the Falcon 9 from the ground and watching the numbers on the second stage burns was really impressive as it ended up at exactly the 600km altitude intended.

@fischX 2 года назад

I don't know space clean rooms but mist in clean rooms is more common than you may think. You can use charged droplets to catch dust and let it sink. At least when it comes to optics moisture of someone kind is preferred over solid particles.

@paologcalisse3229 2 года назад

Thanks for reminding my little country contribution to space mission, Scott! Really hard to release instrumentation on time during a pandemic, btw.

@FredPlanatia 2 года назад

Excellent, I watched the launch and when they mentioned IXPE satellite my scientific curiosity was peaked, and here it is nicely described with some diagrams and even a bit of insider info! NASA didn't mention in their payload video during the SpaceX webcast that this was not the first time x-ray polarization had been measured by a satellite. I guess they might have said 'its the first time images will be acquired using x-rays while detecting polarization.' or something like that. Good to have that cleared up. I was amazed/concerned at how long the structure was oscillating rotationally after the mirrors deployed in that video. So much so that I had to rewind the video because i was too distracted to listen to Scott's narration! p.s. @Scott Manley : On your outro video I see CONCODROID (intro and Outro animations) ECLIPSIO (Outro music). Did you intend to show those widgets?

@gawayne1374 2 года назад

That deployable is beautiful.

@SailingTaranto 2 года назад

Wicked. I woke up this morning and over coffee caught the launch live. I was late at +30mins but as the stream was near a second engine start/seco I watched and thought what a strange thing, I watched the rocket speed drop as the rocket engine fired and thought wtf. It accelerated back up once on the equator and thought that was weird. Your hoon description was way better! Thanks for explaining :-)

@bardigan1 2 года назад

So I'm trying to get my head around 6g acceleration with no change in speed and it turns out from the google that "velocity vector" is pretty well understood. and now I know about it too. Now watching more Scott Manley videos for more concepts I'd never heard of before. Thnx Scott!

@Phoenix-ej2sh 2 года назад

That was one *hell* of a plane change maneuver.

@NozomuYume 2 года назад

The really funny thing is that SpaceX were able to do it for cheaper than a launcher that the payload was tailored for. They both have reusable first stages -- yeah the Falcon 9 gives a lot more delta V than a Lockheed L-1011, but a bunch of the Delta V on the falcon was wasted carrying a large second stage that could change the inclination, whereas Pegasus didn't have to spend any on it. The dry mass of the entire Pegasus rocket (i.e. not counting the Tristar) is actually less than that of Falcon 9's second stage. Meaning that SpaceX actually expended *MORE* hardware in the launch than Pegasus would have. They're still undercutting Pegasus even though the Falcon 9 was more expendable. This shows just how inefficient the legacy aerospace companies are, even on a similar footing.

@lexprontera8325 2 года назад

All those technical reasons? Sure. Maybe... but my first thought was none of that. My first thought was: "Northrop Grumman? They're a US defense contractor, a straight up MIC corporation. OF COURSE they are obscenely overcharging. Not hard to undercut at all. You just charge a realistic price and you've already undercut them."

@simongeard4824 2 года назад

And now think about the fact that missions like this are the entire reason for Virgin Orbital to exist... launching a rocket much like Pegasus from a converted 747, their sole advantage is that they can launch to equatorial orbits without the need for a dog-leg out of the US mainland. Not a good look for them when a mission so perfect for them ends up going to SpaceX.

@hansyolo8117 2 года назад

@@simongeard4824 They only reached orbit very recently so I don't think it's that surprizing. I don't know when the lauchers were bid but it's generally quite a while in advance. Also not sure if they have the fairing size but you'd have to check that.

@simongeard4824 2 года назад

@@hansyolo8117 I'm not sure of the exact figures, but Virgin's LauncherOne is a little bigger than the PegasusXL, but not hugely so... so unless they've managed to reduce the costs a lot, they'd probably still losing to SpaceX in a mission like this. Notably, these air-launched rockets aren't very efficient. LauncherOne is about twice the size of RocketLab's Electron _and_ uses a 747 as a 0th stage - but the payload to orbit is only about 70% higher. All the extra structural mass to support horizontal launch really hurts them, so they *need* advantages like this to make them viable.

@vladimirdyuzhev 2 года назад

This is good publicity, so not necessarily the launch was profitable for SpaceX.

@uuzd4s 2 года назад

Freakin Awesum!

@sschmidt1775 2 года назад

Like the remark of the dirty clean room, I wouldn't have noticed it! Very sharp. (can't see a light beam, if there is nothing reflecting it in the path of the beam).

@MonsterSound 2 года назад

I was watching the speed during SES-2 thinking, "WTH? Really? Is this because they are changing heading?" Thanks Scott.

@jeffvolosin5832 2 года назад

Great video! For clarification - your photo of the Uhuru "engineers" is actually NASA's Uhuru Project Manager Marjorie Townsend and ASE's Bruno Rossi who worked with Riccardo Giacconi

@Ryukachoo 2 года назад

WHAT? MULTI-CORRIDOR ORBITING!? *Eurobeat*

@Reactordrone 2 года назад

I was watching the telemetry for the second stage burn and saw the speed barely changing during that inclination change. Very Kerbal approach.

@Zralock79 2 года назад

OK... I am just curious if there will be no problem by vibrating boom... as we could see during the test-deployment in the clean room. When the spacecraft will change its orientation I think that this can be an issue. What do you think?