How Earth Would Look Like From Far Across The Universe?
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When you are looking at the stars in the night sky, you are looking back into the past. Yes, you heard that correctly. When you are viewing anything in the universe, you're looking back in time. This is because we can only perceive objects in the Universe as they were when the light from them was most recently emitted and arrived at our eyes and sensors. Because of this, light from objects far away from us can take millions of years to reach us. That is true here on Earth and all throughout the universe. So if that's the case what about a distant observer on a planet observing us? What would he be able to see? Will he be able to see humanity or dinosaurs? Let’s talk about what Earth would look like ‘right now’ from far across the universe.
5-) From the most distant object known to humans, Galaxy Gn-z11.
First discovered in 2015 , Gn-z11 is a highly red shifted galaxy and is the farthest galaxy ever known in the observable universe. At a distance of 32 Billion light years from Earth, the galaxy was recently observed as it existed 13.4 Billion years ago, 400 million years just after the Big Bang. In case you are wondering how it is at such a large distance from us if the universe is only 13.8 Billion years old?
4-) From the Andromeda Galaxy, our neighbor.
The Andromeda galaxy, also known as Messier 31 is the nearest galaxy to our milky way. It is located at approximately 2.5 million light years (765 kiloparsecs) away from Earth.
3-) From the Large Magellanic Cloud, the closest intact galaxy to us.
Andromeda is definitely the closest galaxy to us, but the closest intact galaxy to us is the Large magellanic clouds or LMC. At a distance of 163,000 light years (or 50 kiloparsecs) the LMC is a satellite dwarf galaxy of the milky way. It contains about 10 billion stars and spans about 32,000 light years across.
2-) From the brightest star in the night sky, Sirius.
Our night sky is filled with thousands of stars and the brightest of them is Sirius. It is located 8.6 light years away from us and is a binary star system. If we made observations from the Sirius star system, Earth would appear as it did back in 2014. Simply because light from Earth would take 8.6 years to reach Sirius.
1-) From the most distant man-made object, the Voyager 1 probe.
Voyager 1 is officially the most distant man made object. It is currently at a distance of 158 Astronomical units, which corresponds to 14.7 Billion miles or 23.5 billion kilometers. It took 45 years to arrive at its current location, which is beyond our Solar System's termination shock, after it was launched in 1977. It's one of just five spacecraft currently fleeing our Solar System, and it will remain the most distant for all time until we launch a new mission to catch up with it.
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Credits: Ron Miller, Mark A. Garlick / MarkGarlick.com
Credits: Nasa/Shutterstock/Storyblocks/Elon Musk/SpaceX/ESA/ESO/ Flickr
00:00 Intro
2:50 from Galaxy Gn-z11.
4:20 from the Andromeda Galaxy
5:20 from the Large Magellanic Cloud
6:32 from Sirius
7:44 from voyager 1
#insanecuriosity #earth #universe