How Eclipses Revealed Our Solar System

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Of all the astronomical phenomena you can witness, the total solar eclipse has to be the most visceral--the most in-your-face reminder that our reality consists of giant balls of rock spinning around stars. It's also the eclipse and phenomena like it that set us on the path to understanding that reality in the first place.
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Hosted by Matt O'Dowd
Written by Matt Caplan & Matt O'Dowd
Post Production by Leonardo Scholzer, Yago Ballarini & Stephanie Faria
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Assistant Director of Programming for PBS: John Campbell
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Опубликовано:

8 июн 2024

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Комментарии : 780

@pbsspacetime 2 месяца назад

Hey Space Timers! As you'll hear in the episode Matt says "today" when referring to the Solar Eclipse. For clarity, the solar eclipse in North America will be on Monday, April 8th, 2024. We were originally going to publish this episode on eclipse day, but decided to push the release so more of our community could see it and enjoy it before Monday. We hope you enjoy the episode and that it can give you some more perspective on how important eclipses have been to the collective understanding of our place in the solar system!

@jtgullickson6117 2 месяца назад

As in, "this day and age", I would imagine.

@Scubadooper 2 месяца назад

Understandable

@my.names.robb.with.two.bs1 2 месяца назад

I knew there was going to be a video today. My psychic skills have gone Super Saiyan!

@bardsamok9221 2 месяца назад

Please do an episode on Brane Cosmology and M-Theory.. its stunning and not disproven, accelerators need to advance to prove or disprove LED. Either way M is a stunning theory and Witten is a legend. Would be a stunning landmark episode if you get the graphics right!!

@hrbrown29 2 месяца назад

Had to do a quick Google search to make sure I didn’t hop branches during my sleep. (before seeing this comment 😅)

@Scott.Sandifer 2 месяца назад

0:00 _"A little later today..."_ Even though I *KNOW* what day the eclipse is, and have been planning for it, you still sent me into a panic. I'm much too easily swayed.🤣

@pbsspacetime 2 месяца назад

Sorry. We didn't mean to scare you! It's still definitely April 8th!

@DavidsDreamFactory 2 месяца назад

same!

@anarchyantz1564 2 месяца назад

@@pbsspacetime Great way to evade we are really in a simulation and adjust the comments rather than reality huh? 🤣🤣

@NiaNostos 2 месяца назад

I had the same reaction, except a week ago I misread the date of the eclipse and thought it was on the 6th so I thought I was really going crazy lmao

@scottdorfler2551 2 месяца назад

@@anarchyantz1564 Hey, is that a black cat... Hey, is that a black cat...

@AlexWalkerSmith 2 месяца назад

I said "wow" out loud at least 3 times during this video. Human curiosity is borderline obsessive!

@jenbanim 2 месяца назад

Being able to deduce so much about the universe just with some shadows and math is absolutely incredible. The history of astronomy is fascinating. One of my favorite stories is Rømer's determination of the speed of light using nothing but the orbit of Jupiter's moon Io

@Enkaptaton 2 месяца назад

Ok THAT sound incredible. I will have to read about it

@kingdomofashes 2 месяца назад

Soacetime videos often make me feel stupid, but seeing what the ancient grreeks could figure out with basic geomtry from some simple observations is anazing

@patreekotime4578 2 месяца назад

Yeah, using mechanical clocks! Really amazing!

@JamesTWood 2 месяца назад

makes me wonder if having an eclipse or some such astronomical phenomenon of similar obviousness, is a key to the development of space-faring species 🤔🤔🤔

@patreekotime4578 2 месяца назад

@@JamesTWood One of the interesting things about our place in the universe is that the distance between the Earth and the Moon, the size of each, and the angle of the orbits, and the position of the land masses allows these eclipses to be observable at all. How many other worlds simply have transits of moons or other planets that dont block out the star? How many worlds dont have the parade of shadows across their moons like our lunar cycles?

@BoomerZ.artist 2 месяца назад

What I love about this is it shows ancient people weren't dumb and we are as a species are not so much smarter. We just have better tools, built up from a foundation of those before us. If you would have dropped these ancient thinkers in modern day, with modern measuring tools, they would have gotten the same answers we get. I very much dislike when people don't understand evolution wouldn't make us smarter in 3000 years, it's too small of a timeline.

@Llanchlo 2 месяца назад

All flerfs shoud be required to watch this and identify the "errors" in reasoning and math ...

@ianoxenham4219 2 месяца назад

"If I have seen further than others, it is by standing upon the shoulders of giants." -- Isaac Newton

@BenjaminCronce 2 месяца назад

Even within the human species, there's so much variation in the ability to solve certain types of problems. I've seen people with no background in a problem, solve an issue in minutes that stumped a group of experts for weeks. They were just curious about something the knew nothing about.

@justalex4214 2 месяца назад

Whenever someone says evolution made us smarter in the last 3000 years, just point at flat earthers, lol.

@pansepot1490 2 месяца назад

Great comment, so true. I on the other hand, especially when experiencing certain people, realize that we are not much more intelligent than apes. Our great strength is that we are a social species and by working together we can make the most of the individuals with the brains and those with the brawn.

@NewMessage 2 месяца назад

I watched this whole video without wearing eye protection.

@stevesmith2044 2 месяца назад

Did you get blinded by science 😂

@NewMessage 2 месяца назад

@@stevesmith2044 🤣

@seattlegrrlie 2 месяца назад

Are you okay?

@kellyk8630 2 месяца назад

Giggity

@chrishunter9294 2 месяца назад

Your retinas will be burnt upon the heat death of the universe

@Quasar2309 2 месяца назад

5:46 If anyone IS asking why, the "first quarter" and "third quarter" are the 2 phases that occur when the moon is 1/4 and 3/4 of the way through its new moon -> new moon cycle.

@DGaryGrady 2 месяца назад

Correct! It also helps to remember that the word "moon" can refer to a lunar month. At (roughly) the end of the first and third quarters of a given lunar month (or "moon" in that sense), the moon as seen in the sky appears half-illuminated, i.e., a "half moon" in that other sense. I've sometimes heard people suggest that this is incorrect, but it isn't; it's accurate and descriptive but refers to a different meaning of the word.

@traybern Месяц назад

Yet each shows HALF of a FULL moon!

@DennisGr 2 месяца назад

I watched the total solar eclipse from a bavarian mountain in 1999. as the moon started to completely cover the sun the vast fields in front of me turned pitch black as the light slowly dimmed and as the wall of shade hit me it became dark as night. it was insanely impressive. really gives you a sense of scale.

@thechickenduck8377 2 месяца назад

I saw that one too although in the garden 😂 What I’ll never forget is how nature slowed down to the point where birds stopped chirping and it was an eerie silence, as the eclipse approached. Apart from that, birds starting to chirp again on that sunny day shortly after the eclipse made it all the more amazing. It had a soundtrack lol

@Leyrann Месяц назад

Ooooh that's something to keep in mind. Me and my family are intending to watch the 2026 eclipse in Spain, as it occurs in August, at a good time to go on holiday (we're planning on the Pyrenees, so it'd only be a few hours traveling). A good view might make it even more impressive!

@C-TSD 2 месяца назад

Carl Sagan - Cosmos - Eratosthenes. ''Because Eratosthenes had the presence of mind, to experiment, to actually ask, whether, back here, near Alexandria, a stick cast a shadow near noon, on June, the 21st .. And it turns out - Sticks Do.''

@Jerorawr_XD 2 месяца назад

I actually used Eratosthenes' method of calculations with a pen pal in gradeschool to perform the same measurment of the earth's radius for science fair. Really, really smart and ingenious method and it really shows that no matter the tools, humanity will get to the answers.

@chrismward 2 месяца назад

I can’t make this one, but in 2017, the full solar eclipse in Oregon was something i’ll never forget

@derringera 2 месяца назад

Greetings from Corvallis! At least that's where we were for the Eclipse.

@A3Kr0n 2 месяца назад

Did you look up?

@fletc3her 2 месяца назад

It was amazing. We came down from Seattle and had a great experience near Salem.

@chrismward 2 месяца назад

@@derringera 👋 we ( and 30k+ others) were at the Oregon eclipse festival… 😀

@chrismward 2 месяца назад

@@A3Kr0n that’s why I’ll never forget 😜

@johannaverplank4858 2 месяца назад

I’m so excited to live directly in the path of totality!!!! I’m so lucky to be alive to witness this from my own backyard. I hope everyone who witnesses the eclipse is safe and has a wonderful experience!!!

@monicarenee7949 2 месяца назад

I have a bunch of trees in my backyard that would have made for a blocked view, but there’s an open grassy park right in front of my house with benches, and folks from the neighborhood all came to it to watch in the open field. It was perfect!

@whitehorse1959 2 месяца назад

Matt is my all-time favourite narrator. His Aussie accent, perfect pronunciations, and fluid delivery are awesome. Give this man a round of applause!

@gerimaple 2 месяца назад

Usually perfect pronunciation - Newfoundland rhymes with "understand", with emphasis on the first syllable.

@PMA65537 2 месяца назад

9:49 Not so good on Greek names.

@besticudcumupwith202 2 месяца назад

...😂 the hands tho. He can NOT speak without waving the hands around. It's visually distracting.

@whitehorse1959 2 месяца назад

@@besticudcumupwith202 - Maybe part Italian? 🙂

@whitehorse1959 2 месяца назад

@@PMA65537 - as long as he doesn't call horiatiki salad a 'Greek salad' he's good. 🙂 but it's all Greek to me

2 месяца назад

In addition, it was relatively common knowledge among classical Greek scholars that the Sun, the Moon, the Earth and even the other planets were (almost) spherical in shape due to what we would call “gravity,” a phenomenon that they perceived as the propensity of more dense/“heavy” objects to go to the “bottom,” that is, toward the centre of such spheres (see Aristotle’s “De Coelo”/“On the Heavens”).

@ajh8566 2 месяца назад

I will never forget seeing a total solar eclipse. It's truly breathtaking.

@Enkaptaton 2 месяца назад

I was a bit jealous here in Germany. Did you have a clear sky?

@ajh8566 2 месяца назад

@@Enkaptaton Yes, it was a hot, clear day. I travelled just over 800 miles to see it!

@ashvio 2 месяца назад

Lucky, it's cloudy tomorrow where I am :(

@bigusj 2 месяца назад

“But if we laugh with derision, we will never understand. Human intellectual capacity has not altered for thousands of years so far as we can tell. If intelligent people invested intense energy in issues that now seem foolish to us, then the failure lies in our understanding of their world, not in their distorted perceptions.” -SJ Gould

@kevinpotts123 2 месяца назад

I'm just a little north of Carbondale Illinois waiting for this. I drove 5 and half hours to get here because this is where the weather looks the best from where I was.

@kevinpotts123 2 месяца назад

@@Stossburg hopefully it clears for you there.

@enjibby 2 месяца назад

I can't lie, this subject matter is so accessible that I've found this episode one of the most thought-provoking. All despite finding your recent holographic explanations fascinating.

@MCsCreations 2 месяца назад

According to the vikings, you should scream your lungs out during an eclipse. So, you know... No one is going to judge.

@bigsmall246 2 месяца назад

According to the church, you needed to throw inti jail anyone who realized the truth of the solar system, i.e. everything orbits the sun. Their storybook taught that everything orbits around earth.

@KuK137 2 месяца назад

@@bigsmall246 It's even funnier, their voodoo book outright says earth is flat ("plane of the world"), has corners, and wind is made by their deity when grandpa sitting on a cloud is bored and needs to vent. No, this is not a joke, this is literally 1:1 passages found in that trash pile of a book. Funny how voodoo 'literalists' always quietly ignore these verses...

@adammeyer3129 2 месяца назад

@@bigsmall246which church are you talking about, because I can guarantee that's not true across most of them. There are, however, extremists. They are out there. If you are talking about Christianity or Muslim, it's just the extremists. The Bible actually documented different star and planet alignments

@bigsmall246 2 месяца назад

@@adammeyer3129 Galileo was imprisoned for life by the roman church. The archbishop of Siena himself sentenced Galileo to house arrest for life. If an extremist can go to such a high rank, isn't the whole religion extremist then?

@eamonreidy9534 2 месяца назад

@@adammeyer3129 where does the Bible document stars and planets

@sharpsheep4148 2 месяца назад

Hey, most of us don't need to imagine what it would be like to not know what is out there, we just observe our family dinner conversations. 😅

@Commander_ZiN 2 месяца назад

Yeah, it's gotten really bad.

@duncanbeggs4088 2 месяца назад

Always blows my mind how smart the Ancient Greeks were.

@LanceMcCarthy 2 месяца назад

Love this throwback. The breadth of this channel is amazing, and is why I am still a subscriber since almost the beginning.

@ahippogryph 2 месяца назад

And yet, there are those, that vehemently believe the earth is flat, nearly 2500 years later.

@BulentBasaran 2 месяца назад

Good point! Never take truth for granted. Personally, I haven't met anyone in person who believes that, except some folks on RU-vid. Maybe, and I am trying to be charitable here, they simply believe that the earth is flat enough 😅

@traybern Месяц назад

NO. They just LIKE being A$$HOLES.

@quantumcat7673 2 месяца назад

I'll be in Sherbrooke, Qcl monday where we will have about 3 min 20 sec of totality. Forecast is full clear sky. It will be my first total solar eclipse. Thanks for this nice piece of science and history!

@marcusaurelius49 2 месяца назад

There you go, knowing stuff again. Don’t you know we are in the age of ‘I believe what I feel’?

@bipolarminddroppings 2 месяца назад

Isn't there a T-shirt that says "My facts don't care about your feelings"? If not. Someone should make it and cash in...

@garethdean6382 2 месяца назад

@@bipolarminddroppings Sadly I expect it'd be bought precisely by those whose facts are determined by feelings.

@tma2001 2 месяца назад

@@bipolarminddroppings reminds me of: the saying your're entitlrd to your own opinion just not your own facts

@oasntet 2 месяца назад

The Venusian transit study is really cool. I didn't know about that effort, but it's these sorts of details that really add depth to the story of science figuring out how the universe works...

@haruyu123 Месяц назад

Me too. That's a significant moment. Sorta sad I didn't know about it before

@SolaceEasy 2 месяца назад

Praying for clearing skies.

@AlanTheBeast100 2 месяца назад

Here - statistically cloudy on April 8. We will have clear skies!!!!

@patreekotime4578 2 месяца назад

Saw the total eclipse 7 years ago in Tennessee. It was absolutely amazing. If you plan on seeing this one, try to make sure there are trees nearby... the insects and birds reacting is absolutely wild.

@Xonatron 2 месяца назад

Thanks for the tip!

@osmosisjones4912 2 месяца назад

Send this to flat earthers

@timbeaton5045 2 месяца назад

They would say he is being paid to lie to us! Best to just laugh at them, really!

@patrickday4206 2 месяца назад

It's all a simulation anyways

@patelk464 2 месяца назад

@timbeaton5045 they still think that the world thought that the Earth was flat until NASA was formed.

@briebel2684 2 месяца назад

Best just to ignore them. Block them out like you use your hand to block the sun on a bright day. Either through stupidy or purposeful trolling, they are immune to logic and reason. They thrive on wasting your time with their nonsense.

@garethdean6382 2 месяца назад

You can lead a horse to culture, but you cannot make him think.

@mrbrianparker 2 месяца назад

The visualisations on this channel are always great but this one just stood out as particularly impressive.

@sunnyscaper8560 2 месяца назад

Amazing visual display with explanation! Many thanks to the editing team!

@frun 2 месяца назад

I'm stunned by Aristarchus 7:24. He had 300 IQ. He calculated the size and distance to the Pac-man we see on the sky 300BC 🐒

@gregormonkey 2 месяца назад

Really love the new end credits sequence!

@jaquessiemasz8650 2 месяца назад

Shivers and tears! I found myself yelling "Wow!" multiple times. Excellent and timely episode!

@zacharywong483 Месяц назад

Fantastic video, as always!

@thatonemartini873 2 месяца назад

YO SATURDAY VID LET'S GOOOOOOOOOOOOO

@user-ig8pd9qn5h 2 месяца назад

This was something I was able to understand, very inspiring video! It is fascinating to realize how much the ancient Greek already knew. In contrast, high level QFT and Quantumgravity can be very overwhelming and I usually get lost rather quickly.

@RensKieviet 2 месяца назад

Amazing episode, very inspriring information!

@joseraulcapablanca8564 2 месяца назад

I live not far from Vardø in the arctic circle one of the places from which the transit of venus was observed to make the solar parallax measurement.

@goransolheim8772 Месяц назад

Loved the merch it totally lit up during totality keep up the awesome videos

@gordonbradbury8996 2 месяца назад

One of your best episodes yet Matt! Well done!

@Nightscape_ 2 месяца назад

I'm only an hour from 100% totality. Can't wait to see the rest of you all in Evansville for the eclipse.

@UNr34 2 месяца назад

It's crazy how some dude sitting on a bench figured out the solar system by its shadows.

@teashea1 2 месяца назад

excellent topic and well done presentation

@jameskirk4692 2 месяца назад

Thanks for the great episode! Always interesting and enjoyable to watch these. I should be watching you regularly, instead of just here and there.

@pgupta2341 Месяц назад

Wow vastly improved speech delivery/ presentation on this one - thanks, very much appreciated!

@fayelitzinger9824 2 месяца назад

When I saw the total solar eclipse in Oregon I absolutely gasped in awe. Even though I knew exactly when and where to look, and exactly what I was looking at, it was still an almost "spiritual" experience. I cannot imagine what I would have felt/thought if I had that same experience without knowing it was coming or much about what caused it. I'm very sad I cannot make it to the path of totality this time.

@vexed001 2 месяца назад

For anyone who missed the totality, I wanted to let you know it was awesome.

@thunderstruck1392 2 месяца назад

Drove to Ktucky in 17, I'll watch this one from my backyard in Cleveland😎

@patelk464 2 месяца назад

Great episode, still learning something new.

@spelunkerd 2 месяца назад

I find it jaw dropping to understand how intelligent these guys were.

@rproyecto 2 месяца назад

Enjoyed the animations!!

@RwnEsper 2 месяца назад

Quarter moons makes perfect sense, they indicate the moon's travel through its full cycle. You have 1st quarter, Full, 3rd quarter, New. Probably a reliable enough measure of time for planning harvests, travel times, coordinating attacks, etc.

@JNArnold 2 месяца назад

Perfect ending to a great video. Definitely feel proud of this one, though really all of them. Amazing work!

@kanedakrsa 2 месяца назад

PBS spacetime aka Matt's lectures on physics to spooky dungeon music

@707liner8 2 месяца назад

Fantastic stuff and a tribute to all of those from ancient times through to today how have broadened our knowledge of the solar system and how it works.

@RayRay-ex9gc 2 месяца назад

Always enlightening thank you 😎

@phaethon4595 2 месяца назад

Excellent episode, thank you Matt and team! I made a point to watch it with my kids so they could understand how scientific discovery builds across time.

@jtgullickson6117 2 месяца назад

Yay , new episode time!

@KalebPeters99 2 месяца назад

This was such a fantastic video, I love hearing the entire story of humanity working to refine a certain piece of knowledge Puts it all in perspective so well! And the beautiful animation makes it really digestible, bravo!

@Petey194 2 месяца назад

Exceptional stuff. Great visualisations.

@merinsan 2 месяца назад

I did not realize that Australia was the size of the moon...

@candicemiller1174 2 месяца назад

I'm soo extremely lucky that I'm in the path of totality. I'm beyond excited!!

@KeithCooper-Albuquerque 2 месяца назад

Fascinating episode!

@Space30MINUTES Месяц назад

You have explained in detail what I need. Thank you very much

@NovaDeb 2 месяца назад

Great video! Very interesting.😊

@LeChat084 Месяц назад

Thanks ! (and thanks for the french subtitles)

@anthonyhargis6855 2 месяца назад

Always interesting, always educational, always . . . fascinating. Can't wait for the next video, Professor O'Dowd.

@trainyoumust 2 месяца назад

Thanks you for this amazing video! ❤ it!

@MultiMMariOO 2 месяца назад

this was such a high quality video!

@jkuhl2492 2 месяца назад

Ancient people: "earth is demonstrably round" Morons on TikTok: "NASA is lying! earth is flat!" I think we're regressing.

@Sinnistering 2 месяца назад

Just watched the eclipse. I know the astronomy behind it. But it's still an event that breaks the human brain. This is one of those rare occasions where I lament the impact "awesome" has nowadays because there is no way to describe it. It fills you with awe.

@NovaSaber 2 месяца назад

The half-moon phases are called "first quarter" and "third quarter" because they happen 25% and 75% of the way during the moon's period. (Counting from "new moon" as the start point. "Second quarter" would be the full moon, but calling it that doesn't add any precision since there's only one full moon per lunar month anyway.)

@devindaniels1634 2 месяца назад

Came looking to see if anyone else shared this.

@seattlegrrlie 2 месяца назад

This is one of your best videos

@jonvanderhorn1506 2 месяца назад

I just moved up to West Michigan, from Austin Texas, too. Last month. I'm so sad lol 😰

@bogdanspineanu 2 месяца назад

What a beautiful episode !

@toddbaglee1538 2 месяца назад

Thank you very much for this video. I have heard how the distances and size of the Earth were calculated in the past, but they never really provided any detailed explanation on the steps and logic that went into it. I finally get it, so thank so much

@dominicsimone 2 месяца назад

I would love an entire series that explains how we got to our current understanding across many disciplines!

@CATinBOOTS81 2 месяца назад

5:49 "Those half-full points are technically called quarter moons. Don't ask me why." That's because "first QUARTER moon" and "third QUARTER moon" are at a 1/4 and 3/4 of the lunar cycle. Other significant points are at half ("new moon") or zero/1 ("full moon"). That's the reason why they are called "Quarter Moons". For the first time ever, I can explain something to Matt - it feels amazing 🤣

@philipmurphy2 2 месяца назад

New PBS Space Time video, hooray

@rbbza2749 2 месяца назад

I can say proudly I understood everything of this pbs video. finally.

@jahosaphat 2 месяца назад

There's always time for PBS Space Time.

@brandonhogstad9666 2 месяца назад

Wow, the global collaboration to measure Venus’ transit across the Sun… super impressive! 😲

@chriscole4149 2 месяца назад

Love it! Thank you.

@corrode5734 2 месяца назад

Thank you so much for all your amazing work. Your videos have inspired me to learn so much more than I would have otherwise, and they have had a measurably positive impact on my life.

@StrotherPitzke 2 месяца назад

This was amazing!

@n8wrl 2 месяца назад

This was fascinating, as usual. And yet I couldn't help but be mesmerized by the moons on Matt's shirt "floating" above his hands at 6:00 and again at 7:20!

@Axeltreman 2 месяца назад

Amazing!

@jeremyholbrook2094 2 месяца назад

Great history lesson 😊

@Vinniewashere 2 месяца назад

It happened today! One of the coolest things I've ever witnessed

@markelagirre7599 2 месяца назад

I really enjoy this video, as it is not about a heavy science topic and speaks about curiosities about eclipses

@jamiegallier2106 2 месяца назад

Great info. ❤😊

@okman9684 2 месяца назад

Its fascinating that it is happening for billions of years and we still get fascinated by the eclipse 🌚

@2Sor2Fig Месяц назад

I remember being a kid and watching a total solar eclipse. A group of nearby chickens immediately went to roost, then returned a few minutes later as if nothing had happened. I'm honored I get to live as a scientist. Much love from Zimbabwe.

@artificercreator 2 месяца назад

Oh nice. Good video!

@JamesAddison-si2np Месяц назад

Off topic, but this channel has really inspired me. I graduated with a degree in interdisciplinary studies, which is basically the GED of college. It got me a decent job, but nothing too exciting. However, thanks to you, I've decided to dive into physics, which I've always found intriguing but above my pay grade. But thanks to your videos I've started studying on my on and am starting to get the hang of calculus, a subject I used to avoid like the plague.... I'm even thinking about going back to school. So, thanks for everything. Once I've got a good grip on all this math, I'm going for that physics degree and aiming for astrophysics.

@khandimahn9687 2 месяца назад

People figured out so much of this over 2 thousand years ago... and yet there are people today who insist it's all a conspiracy and the world is actually flat.