The DU Lounge
Related: Culture Forums, Support Forums"Dinosaurs roamed the Earth on the other side of the Milky Way galaxy"
I'm always fascinated with articles about the universe, about how old the universe is, how old our Milky Way galaxy is and how we all fit into the universe. Not that I always understand what they say, but I'm just amazed our Earth is a little pin prick in the whole universe and even our galaxy. That Earth has existed 4.5 billion years, while humans have existed for only 3.5 - 4 million years. It puts into perspective sometimes how insignificant we all are in the total scheme of things. That while we are on this earth for such a short time we really should be focused on making life better for all and protecting our planet.
Anyway given that background, you can understand why I might be interested in an article titled.....
By Ashley Strickland, CNN 8 hrs ago
Apart from the asteroid that wiped out the dinosaurs 65 million years ago, there aren't many connections between space and dinosaurs outside of the imagination. But that all changed when NASA research scientist Jessie Christiansen brought the two together in an animation on social media this month.
For the past decade, Christiansen has studied planet occurrence rates, or how often and what kinds of planets occur in the galaxy, while studying data from exoplanet hunters such as NASA's Kepler, K2 and TESS missions.
During a stargazing party at the California Institute of Technology, Christiansen was explaining how young the stars were that they observed. The skywatchers were looking at the Pleiades, a bright young cluster of stars that are some of the youngest in our sky.
They're 13 million years old, which sounds ancient. Christiansen wanted to convey that astronomically, that's still a young age.
She told her fellow stargazers that before they went extinct, dinosaurs wouldn't have even seen these stars in the sky because they didn't exist until millions of years after the extinction event. And she told them that when dinosaurs such as stegosaurs roamed the Earth, our entire solar neighborhood was on the opposite of the Milky Way galaxy that it is now.
More>>>>>
https://www.msn.com/en-us/news/technology/earth-was-on-the-other-side-of-the-galaxy-when-dinosaurs-reigned/ar-BBWIg4V?li=BBnbcA1
Way galaxy
https://www.businessinsider.com/video-nasa-scientist-dinosaurs-milky-way-2019-10
The articles mentions how NASA research scientist Jessie Christiansen developed an animation to visually depict the relationship between our Solar System's trip around the center of the Milky Way Galaxy and dinosaurs.
Link to tweet
?ref_src=twsrc%5Etfw%7Ctwcamp%5Etweetembed%7Ctwterm%5E1166773845400801281&ref_url=https%3A%2F%2Fwww.businessinsider.com%2Fvideo-nasa-scientist-dinosaurs-milky-way-2019-10
I follow Dr Christiansen's Twitter feed. She does a great job of explaining things for the lay person.
Just thought you all might find this interesting
tblue37
(65,329 posts)Thomas Hurt
(13,903 posts)we have a hard time wrapping our heads around it due to our terrestrial existence. Best we can do is put it in perspective we grasp.
Example: If the Sun is a meter and half in diameter, Earth is the size of marble and the diameter of the solar system to Neptune is roughly 7 miles.
Phoenix61
(17,002 posts)We could be seeing light that started its journey to us tens of thousands of years ago. How trippy is that?
Fla Dem
(23,650 posts)So I always wonder, when we see pictures taken by the Hubble Telescope of far off galaxies, do they still exit? Or when they show the birth of a star, how many millions of years ago did that actually take place. So many questions.
This video of the birth of a star, but a million years old.
paleotn
(17,911 posts)may supernova tonight...or already went supernova centuries ago and we just haven't seen it yet. Weird stuff.
PoindexterOglethorpe
(25,848 posts)Those who blithely think we've been visited by aliens from somewhere else in our galaxy fail utterly to understand just how vast interstellar spaces really are. Here's something I learned recently may help.
Our galaxy, Milky Way, has about 300 billion (that's billion with a b) stars. Andromeda, the nearest one of any size (some smaller ones are closer) has one trillion stars of so, about three times as many. The two galaxies are on a collision course. Brace yourself and pay attention to property values. Although the initial impact is over 4 billion years away.
Anyway, I recently asked an astronomer friend just how many individual stars will actually crash together when that happens. He said they weren't entirely sure, but probably no more than 10.
Of course many more will interact gravitationally, but actually smash together like flaming car wrecks? An infinitesimally small number.
Here's a cool video of what will happen:
Also, it's obvious that Milky Way has already swallowed up smaller galaxies in the past, and eventually (some 150 billion years from now) all of the galaxies in our local group will have merged, and by that time everything else will be so far away that their light won't reach us. So astronomers in that distant future will have no way of knowing that there is anything outside their own huge galaxy, will have no way of knowing how old the Universe is because the microwave background radiation from the Big Bang will by then be undetectable, and will simply be living in an old and aging portion of an old and aging Universe.
I really do love astronomy and cosmology.
Fla Dem
(23,650 posts)at some point, because of the expansion of the universe, they will see no visible light in the night sky. Well, I know I won't be around to experience that.
PoindexterOglethorpe
(25,848 posts)While there are stars out there between galaxies, that's not going to happen to us. Everything in our local cluster will still be visible. It's just that all the other millions upon millions of other galaxies will be so far away light from them will no longer reach us. Our own mega galaxy will have trillions of stars in it, until the eventual heat death of the Universe.
Fla Dem
(23,650 posts)PoindexterOglethorpe
(25,848 posts)I love astronomy stuff, and my son is in a PhD program in astronomy on the east coast. He's my go-to guy for all astronomy and cosmology questions.
packman
(16,296 posts)DFW
(54,349 posts)I own fossils of animals that used to be my house pets.
CaptainTruth
(6,588 posts)JohnnyRingo
(18,624 posts)Thanx for posting!
keithbvadu2
(36,775 posts)Dinosaurs are still dangerous.
https://i.imgur.com/kJEWynz.mp4
keithbvadu2
(36,775 posts)Karadeniz
(22,506 posts)LeftInTX
(25,258 posts)Over a period of 100,000 years, constellations are unrecognizable.
Polaris is currently the north star, but in 2500 BC a star that is currently in the bowl of the Little Dipper was the north star.
sl8
(13,736 posts)Monty Python
Published on Nov 13, 2008
Subscribe to the Official Monty Python Channel here - http://smarturl.it/SubscribeToPython
Galaxy Song, taken from Monty Python's The Meaning of Life. Terry Jones picked this as part of his Top 10 Monty Python Movie Moments for Esquire Magazine -
"It's such a lovely song. I think it's one of the best things Eric [Idle]'s ever done. There was going to be more animation but Terry was so busy with other parts of the film we ended up using more of the live-action parts that I'd shot for safety."
See the full list here - -http://www.montypython.com/news_terry...
Visit the official Monty Python store - http://smarturl.it/MontyPythonStores
Visit the NEW Monty Python iTunes store - http://smarturl.it/MontyPython1D5TGitun
Welcome to the official Monty Python YouTube channel. This is the place to find top quality classic Python videos, as well as some special stuff that you'll only find here such as interviews and behind-the-scenes footage from our live shows. All the Pythons including John Cleese, Michael Palin, Eric Idle, Terry Gilliam, Terry Jones & Graham Chapman can be found here being incredibly silly.
New videos will be uploaded every Monday!
http://www.montypython.com/
https://www.facebook.com/MontyPython
https://twitter.com/montypython
MatthewHatesTrump2
(915 posts)flying rabbit
(4,632 posts)Leith
(7,809 posts)because of plate tectonics and continental drift.
https://qph.fs.quoracdn.net/main-qimg-4c8ee022eb83dda04fc76b9bf6203da5
Boomer
(4,168 posts)Homo sapiens is only 300-400,000 years old.