What Earth Would Look Like From Andromeda

[Music] the speed of light is over 299 million meters per second or over 299 thousand kilometers per second speed of light is as well the fastest achievable speed in the universe or not really achievable in order to go at the speed of light you would have to have no mass or no materials that you are made of meaning in order to go at the speed of light you can't exist physically but we can get very close to the speed of light the light speed may seem like much but taking into consideration interstellar distances it is not that impressive and does not match our human ambitions to reach other stars fast sure light can in one second go around years 7.5 times but since light has its limits even when you're talking to a human 1 meter away you would see him 3.3 nanoseconds in the past for almost a billions of a second in the past everything you see around you is how it was not how it is now you can never see anything in the universe as it is now but only in the past so let's start with familiar objects such as our own moon it is 380,000 kilometers away on average meaning from Earth we see it 1.3 seconds in the past our Sun as we see it is 8 minutes in the past from Earth and Mars is 14 minutes on average in the past which also means that Rovers humans sent there need an average 14 minutes to respond to a single command for murrs and also means that you can never see Marsh life as well as anything since light speed is the limit for every speed including radio waves microwaves gamma rays and every other way now let's go a little further another star another system the closest star system is Alpha Centauri it is 4.3 light years away it has three stars and the smallest star Proxima Centauri is a little closer 4.2 light-years away from our Sun meaning that it takes even light four years to get to Proxima Centauri now there is an earth-sized planet their orbits Proxima Centauri and it is likely solid so let's suppose there is an alien observer there now and if they had a big enough telescope the mirror likely has to be few thousand kilometers in diameter to observers perfectly and the alien observer would see earth for years in the past which from space the earth would look pretty much the same but if it was an extremely large telescope let's say 25 million kilometers in diameter and it could pinpoint every human it could see you for years in the past because light from an alien observer is just reaching them from four years ago this also means that when we observe Alpha Centauri stars we see them for years in the past the same goes when observing every other star and Milky Way galaxy as a whole the center of our galaxy is 25,000 light-years away meaning we see it 25,000 years in the past so then let's go a bit further with stars let's say a star 2,000 light years away that has a solid planet there are naeli an observer would have to have a telescope likely over hundreds of thousands of kilometers in diameter just observed here from Planet 2,000 light-years away they would now see the earth during the night not with bright dots that we have today with cities since there were no artificial lights but if they could pinpoint every human well first we need to have a telescope that is over 11 billion kilometres across which is comparable to the size of our solar system with this gigantic telescope alien observer that far away would be able to see Romans and other ancient civilizations may be as well spot a glimpse of a war that was going on 2,000 years ago now let's go even further another galaxy the closest big galaxy to ours is Andromeda which is bigger than Milky Way and the future will collide with our galaxy Andromeda is 2 million and 500 thousand light years away meaning we see it 2.5 million years in the past so if an alien observer from a dromeda wanted to observers and its creatures of its time the size of the telescope would need to be well 15 trillion kilometers in diameter or one-fourth of the distance from Sun to Alpha Centauri 15 trillion kilometers is more than a Lightyear big it is 1.6 light-years in length meaning light from one side of the telescope to the other side of the telescope would take 1 point 6 years how such a telescope would operate is not very clear but it sure would Sears 2.5 million years in the past the thing is that it still wouldn't be very different but there would be no modern humans at all from this point in time on earth observers in Andromeda would see Australopithecus YZ for all descendents of humans with their stone tools and see their way of life but it sure wouldn't look like an advanced civilization it is also worth to mention that these observers would see how the Milky Way actually looks like from a distance since we are in the Milky Way we just barely have any an idea of how our galaxy looks like but let's push even more into the space let's go to the largest spiral galaxy found NGC 687 2 it is 500 thousand light-years across or about five times the length of the Milky Way the galaxy is 212 million light years away so again suppose an alien observer points telescope that can see even animals averse so the size of this telescope would need to be over 1 quadrillion kilometers across or 132 light-years across meaning from one side of the mirror to the other side it takes light 132 years to travel to get a perspective a very big star clusters such as Messier 68 is hundred light years across which is smaller than this suppose an alien telescope so it's Caesars and it doesn't see today's continents but rather one continent Pangaea since that was 200 million years ago but they as well could see a blue ball and they would think that it's an oceanic planet but while looking at Pangaea alien observers would get to see the first dinosaurs and many other organisms that are not here today including ancient deserts and mountains who knows what would they discover about the earth that we humans don't know so we can continue going back in time even further but there's no point as of right now because the further the alien observer is Frommer's the further into the past will it see earth now to get a perspective of how big these light year distances are we're taking a look at Voyager 1 spacecraft which is not headed for Proxima Centauri which is the closest star but if it were it would take 40,000 years to reach it also Voyager 1 is traveling at a speed of 17 km/s or 60,000 kilometers per hour which is over 45 times faster than a shock bullet so yeah cosmic distances are a lot larger than they may seem but we should always work towards improving the speed of our spacecraft so we can explore this universe and understand it a bit better [Music] you

Channel: Dreksler Astral

Views: 3,309,184

Rating: 4.6785722 out of 5

Keywords: earth, from, andromeda, earth from andromeda, milky way from andromeda, miss, earth from alpha centauri, earth from another galaxy, earth from a galaxy, closest galaxy, proxima centauri, closest star, proxima centauri b, closest exoplanet, biggest galaxy, largest, glaxy, space, mars, moon, light speed, time and light, nanosecond, telescope to observe exoplanets, ngc 6872, spiral galaxy, light year, habitable planets, traveling into the past, past, light speed and past, dreksler astral

Id: ey2uVC3ULKM

Length: 8min 41sec (521 seconds)

Published: Sun Jun 04 2017

Reddit Comments

[u/lionofthe]

Would be faster but everybody is logged into Pioneer47 and it’s bogging down the internet.

[u/FloatOldGoat]

That perfectly explains why TSCC is so far behind the times.

[u/X-cessive-leader]

I love it.

[u/Wileecoyote49]

Prayers about missing car keys get express service.

[u/Tidderring]

❤️💯🔥💫

[u/causes_not_cures]

Explains why I never get a clear answer. So, when I hit 60ish I'll finally get an answer to those school tests I prayed for help during the exam and around 65 I'll get my answer to the book of Mormon. Should be interesting.

[u/iwasduped]

Even god cannot break the speed limit of the universe!

[u/chuckle_puss]

But a light year is a measurement of distance, not time.