I’m 70 years old now days and live in deep poverty area in the southern Philippines. Thank you for playing your part in making the world a better place,you are so very kind natured and love to listen to you on the edge of my seat. God bless you young man 👍
Congratulations, and thank you for bringing the cosmos into focus for us all! Your dedication to this subject matter has made a huge contribution to my knowledge...and many many others I'm sure would attest the same thing! Seriously, thank you very much for what you do! You HAVE made a positive contribution to this world!! ❤❤
Space communications....several years ago I recall a new function of TCPIP protocol so that for each "hop" in a series of routers each router would buffer and could re-transmit a data packet without asking the source of the packet to re-transmit. This is a critical step to effective relays. Not sure if this has been implemented or not but like for Mars orbiters that we have today, I would expect the newer ones would be doing this already.
Thanks for 25 years of space info! Congratulations! Question: How many deadlines will Musk be allowed to miss before NASA accepts that $3B is a sunk cost, and takes things back in-house, or abandons Artemis altogether?
YEAH WE'RE GETTING OLD. But that's beautiful. Age is a bless. And about the moon... I grow up in Brazil and live in London 4 30 years n ALWAYS watch d moon n yeah it's upside down. I c a rabbit up or down. It's great isn't it?
10:48 when a white dwarf exceeds the chandrasekhar limit, shouldn't it collapse into a neutron star instead of exploding? 22:39 now why does that thing remind me of the eagles in space 1999? 36:11 also, don't forget that the universe was much smaller and therefore much denser than it is today. that's gotta have some kind of effect.
A type 1A white dwarf supernova has a carbon-oxygen core, not a dense iron core, so when it goes supernova its entire core is blown apart and does not undergo core collapse into a neutron star.
Technically... Those photons don't (likely) expetience time, so they don't travel to you until they "know" they can be exchanged between their emmiters and your electron recievers. It's a quantum particle exchange, just as 2 electrons sitting right next to each other exchange photonic force carriers. So the telescopes are even more amazing, as they are either communicating with the past, or were destined at the beginning of time to arrange the exchange... Thus communicating with the future. Which is just one more reason Chandra x-ray should't be shut down!
I Vote BETAZED!!!! That's my favourite question, because thanks to it, I now know where Alpha Centauri is (living in Australia means I can see it right now).
Question: Would there be any way to discover any rogue planets that have escaped our solar system, if there are any? What evidence could there be to find out? Would there be any evidence left? Also would we be able to tell if any of our current planets are rogue planets?
at 11:37 What if Halton Arp was right about what causes a redshift in light? (what if light is not analogous to sound) Has anyone made a map of the distribution of stars and galaxies, where redshift is a function of the age of an objest, rather than distance?
TIL that no part of the moon is in perpetual darkness, unless you count the bottom of craters...the side facing us is in daylight part of the time and then as a new moon. the same part of the moon faces us so, it has days and night just like earth
I have two question 1. is there some power that drives the time move forward? if gravity and speed slow down time, there must of some force that drives the time forward 2. Most of the astrophysicists on RU-vid start the explanations by "according to Albert Einstein's theory of general relativity..." but could it be possible that Albert Einstein's theory of general relativity is wrong?
[37:56] "If asked to go to Mars"... At *this* point, the Internet connectivity pretty much SUCKS on Mars (DSN is able to get less than a half megabit per second, and ping times are at least 10 minutes!). Using lasers to communicate would speed things up but the ping-lag would be horrendous. The live Q&A show would suffer dramatically if Fraser was relocated to Mars (and let's not ask about what timezone it would be scheduled in!) Let's just try to convince the powers-that-be to please allow our Fraser to remain here in Beautiful British Columbia!
I wanna know how often a nova happens and is contained inside a giant star, when a bunch of matter in a convection cell slams back down onto the star for example
There are a lot of factors involved in how often a nova happens and can happen over a few decades and up to a few hundred years. Depends on the rate of mass accreted from the star onto the white dwarf, the type and size and composition of the star, the masses, orbital period and distance between them and temperature of the white dwarf. I don't think there is a simple equation that can predict this, but there are very complex simulations that try.
Why does everybody assume the big bang was a singular event? We are basing the fact the expansion of the universe is universal from one event, why can't there be multiple supernova possibly pushing every area of the universe at different speeds and therefore stars or planets moving at different speeds
1:31 Professor Francis Yu - "Gravity doesn't bend light" ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Sj_CBJVvxJw.html lecture by NASA laser optics engineer Edward Dowdy ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-1FQx7Y948mE.html Edward Henry Dowdye Jr., Extinction Shift Principle: A Purely Classical Alternative to General and Special Relativity
I can't sword swallow singularities. Heisenberg's Uncertainty Principle, quantum mechanics' zero-point energy, and string theory's vibrating elemental strings all hint that you can't smash matter into an actual singularity; quark degeneracy pressure should define a 'terminal' density of matter. In the form of pure energy, you could obviously sidestep the incompressibility of matter, but what exactly was supposedly confining that vast energy to a Planck point, a Dyson sphere of GoogleWatt LASERs? And yet, all of the energy that we see in the 1e22 to 1e24 stars plus non-coalesced matter in the Universe adds up to zero at the Big Bang and now? Excuse me, WHAT? "I want whatever she's having."
When I visited Australia from the US we went to a dark sky location to see the milky way (MINDBLOWING), but I was pointing out Orion to my GF and suddenly realised it was upside down, really blew my mind realising that, finally converted me from a flat earther (only kidding) but just rocked my world seeing that, may not sound amazing but seeing it IRL and realising my position on the planet was giving me this new perspective really put things in, err, perspective.
Happy 25th, Fraser. I hope I'm able to find that same kind of spark for myself one day, and I'm so glad you did. My life without Universe Today would've taken a totally different course, and I'm convinced it would've been a worse course, because that's just the quality of content we're talking about here. Here's to many more 🎈📡🔭
You are hilarious today Mr Universe. The equatorial crescent Moon will now always be a ‘The Balls of a horn’ moon. I spat my cuppa tea across the kitchen table and laughed so hard. Thank you, you made my day !
Regarding Laniakea, we have a perfect reference frame - CMB. Our movement in relation to it is measured quite precisely. Without this correction, all measurements of the Hubble constant do not make sense.
The orientation of the crescent Moon changes even when you stay in the same place. There is a folk tale that drought is caused when the Moon "holds water," that is, looks like a bowl held horizontally. When the Moon bowl is tipped so the water can flow out, the rain will come.
I've heard that all of the hydrogen in the universe was formed during the big bang. What sort of energies would be needed to synthesize a proton? Have there been any papers or ideas on how this might theoretically be done?
Question Do we need a disclaimer on all short videos talking aboot released scientific papers that states. This is a theory and not scientifically proven - think it like a person filing a patent for an idea and not something they actually build a working model. Take Prof Parker -- The guy named after the Parker sun probe. His THEORY about solar wind was not proven until a lot later
Another example for a disclaimer would be the recent Beetle Juicie papers that come up with different theories of what and why the star is doing. Which seemed to me they were using the same data, so I'm guessing each team had different assumptions in place "" Assumptions because nobody knows what all the needed parameters ""
The CMB may be nothing more than microwaves given off by our own oceans. Images of it do not look even remotely similar. The design of all (except one!) microwave telescopes (ON and OFF Earth) has meant that signals from the sides can enter the telescope. BUT... The Orgov Radio-Optical Telescope in Armenia has a hemispherical reflector, which means that no signals except those arriving vertically from space, can make it to the detector. All other signals are reflected away from the detector. And... When they pointed it into space, they detected nothing. No CMB. Nada. Zilch. It's the single most sensitive microwave receiver in the world. And Armenia are currently raising funds to recommission it. When that happens, I suspect the CMB will vanish without so much as a puff of smoke.
22:15 - any Mars cyclor would be artificially kept in the Earthy moon system longer than the single loop-back pass. This is because in order for a space station to be useful, it's gotta carry a lot of stuff. And so you stick it in an Earth-Moon figure 8 while you load it up for the Mars leg. Because there is no moon to orbit at Mars, everything gets dropped at once , and the station heads back to earth. I like the idea for freight, because it's very efficient. But it is also very slow, and so putting people on board would be a Bad Idea.
Your enthusiasm for astronomy is contagious! From discussing potential Moon moons to the practicalities of space travel, this episode was both informative and inspiring. Can't wait for the next one!
Kind of a let down on your answer for going to Mars or Luna. If you were so excited about space exploration, there's no doubt you'd have to go. Life is about experiences. Pushing the boundaries of knowledge and discovery. Hiking Mt. Everest wasn't really a great example because even Instagram fam is doing that. Being the first to conquer. Now that's what counts. Those who would risk their lives to further human standing in the universe are the heroes we don't deserve.
Hey Fraser! Thank you so much for the shout-out and for all that you do; Truly top tier science journalism. And Happy 25th Anniversary to Universe Today!
Your Moon image is wrong. Doesn't show the sad face with the bunny for his right eye (left side as it appears to us) which is so incredibly obvious in Australia. And I heard that the Mesoamericans saw the rabbit, but not the face.
