Milky Way Versus Andromeda As Seen from Earth


Astronomers have used the Hubble Space Telescope
to forecast a future cosmic pile up: the titanic collision of the Milky Way and the Andromeda
galaxy in about four billion years time. The Andromeda Galaxy, some 2.2 million light-years
away, is the closest spiral galaxy to our home, the Milky Way. For around a century,
astronomers have known it is moving towards us, but whether or not the two galaxies would
actually collide, or simply fly past each other, remained unclear. Now, a team of astronomers
has used the Hubble Space Telescope to shed light on this question, by looking at the
motion stars in the Andromeda Galaxy. We wanted to figure out how Andromeda was
moving through space. So in order to do that we measured the location of the Andromeda
stars relative to the background galaxies. In 2002 they were in one place, and in 2010
they were in a slightly different place. And that allowed us to measure the motion over
a period of eight years. The motion is actually incredibly subtle,
and not obvious to the human eye, even when looking at Hubble’s sharp images. However,
sophisticated image analysis revealed tiny movements that the scientists were able to
project into the future. Based on these findings, it is finally possible
to show what will happen to the Milky Way over the next eight billion years, as the
galaxies drift closer, then collide and gradually merge into a single, larger, elliptical galaxy
with reddish stars. And yet the Solar System should in fact survive this huge crash. The reason we think that our Solar System
will not be much affected by this collision between the Milky Way and Andromeda is that
galaxies are mostly empty space. Even though our galaxy, as well as the Andromeda
Galaxy, has a hundred billion stars in it, they are very far apart. So if two galaxies
actually collide with each other, the stars basically pass right between each other and
the chance of two stars directly hitting each other is really, really small. So the likelihood
that our Solar System will be directly impacted by another star, for example, in Andromeda
as we collide with it is really, really small. Well, if life is still present on Earth when
this happens, the changes in the sky will be quite spectacular. Now they will be very
very slow because the timescales on the scales of galaxies in the Universe are very very
long. So you have to think, millions of years but even then over these timescales over millions
of years, we will see big changes. If we wait a few billion years, Andromeda will be huge
on the sky. It will be as big as our Milky Way because we’ll be very close to it. And then later, when the galaxies merge, the
merged remnant of the Milky Way Galaxy and Andromeda will look more like an elliptical
galaxy and we’ll be sitting right in it. So the view of the Milky Way on the night
sky will be completely gone and this band of light will be replaced by a more spheroidal
distribution of light. And so, the Sun, born in the Milky Way almost
5 billion years ago will end its life in a new orbit, as part of a new galaxy.


83 Responses

  1. lyric Cook

    January 23, 2020 6:27 pm

    How can you not believe in God after seeing this. We are so very insignificant to whats out there, we are nothing.

  2. B O

    February 1, 2020 9:53 am

    For 4 billion years later humanity say “our solar system probably won’t be effected by that collision” 🙂

    A weird arrogant relaxation for 4 B I L L I O N years later. Man u r nothing okay. Nothing.

  3. I lillerly don't even know anymore

    February 1, 2020 11:44 pm

    Let's hope that there is life in the Andromeda galaxy and when it collides with us in like billions of years we can meet them and work together to obtain light speed traveling.

  4. Jackobt Thoronn

    February 3, 2020 4:54 am

    I rather play " Clackers" with my boys instead of waiting 4billion years in the future…"Like going to the Moon "Backwards" Never happened"..

  5. Suvanwesh

    February 3, 2020 7:24 am

    Plot twist : Aliens in Andromeda Galaxy blow up the milky way galaxy before we collide.
    (they have already launched their super weapon towards us)

  6. zeytitude

    February 5, 2020 1:10 pm

    3:05 Oh my… seeing this in a night sky would be a spectacular sight, overwhelming even. It'll be as much wondrous as those Auroras. You'll just have to stare into the night sky and smile – pretending there aren't any problems in the world.

  7. Baljeet Singh

    February 5, 2020 6:59 pm

    What about Galaxy chocolate bar. When is Galaxy chocolate bar going to collide with milky way chocolate

  8. Koaster Kid For Life -Roller Coasters-Gaming-& More

    February 9, 2020 3:41 pm

    How Can You See the Milky Way From Earth If We Are Inside The Milky Way Galaxy?

  9. deanmoncaster

    February 10, 2020 12:01 am

    So andromeda is going to ruin our view? Also we measure the universe by its redshift because everything is moving away from us.. But andromeda is moving towards us……. What went wrong there?!?!


    February 10, 2020 9:44 am



  11. siva p

    February 10, 2020 6:04 pm

    By the time humans extend their base in establishing their presence in different galaxies & leaving our poor old home Milkyway

  12. ITZ ALEX

    February 11, 2020 1:36 am

    unfortunately, we will never be able to see andromeda and the milky way collide from earth because by that time the sun would become a red giant and would have swallowed earth

  13. milo lee

    February 11, 2020 10:31 am

    Memo to oneself…
    I do not know what is going to happen in my life in the next month,yet here I am watching a you tube recommendation video of what is going to happen in FOUR BILLION YEARS!
    jeeeezzz milo,get ya life together!!

  14. Kate Rider

    February 12, 2020 8:52 pm

    Isn't it kinda of crazy that the entire universe is finite? Everything will eventually burn out when the limited fuel runs out. Then, there will be darkness and no human beings

  15. Louis Vega

    February 13, 2020 6:44 pm

    Actually the lesser and greater magelenic clouds are closer to our galaxy than andromeda, but astronomers don't want to give credence to that, just like they did to Pluto…

  16. Sam Loveless

    February 15, 2020 3:47 am

    The reason our Solar System won't be affected by the merger is that in 5 – 8 Billion years our Solar System will already be Dead!! So they need to quit saying what will it look like from Earth!!

  17. Barry Smith

    February 19, 2020 8:22 pm

    You missing ingredients, gravity and passing rogue comets/asteroids. Plus the entire universe moves, it is gently pushed from the central core. It will continue to expand for 109.5 trillion years then it will contract for 155.52 trillion years then it will sleep for 311,040,000,000 ,000 years. Then the process of expanding and contracting will repeat only it will be 7 times longer.

  18. The Rising Garden

    February 20, 2020 3:43 am

    Andromeda aliens in astronomy class
    Mrs LOL

    Welcome students. Today we’ll be learning about a galaxy called “one of the ingredients in ice cream” where learning about it since it is expected to come within a few billion years and crash into us and our black hole will swallow theirs. In the meantime putting up a dazzling light show.


  19. Workalemahu Degene

    February 24, 2020 4:07 pm

    humans talk about yediromeda galaxy – bed bugs talk about solar system humans laugh anjels laugh too bekos humans hate bed bugs angels hate to planet bugs

  20. Frosty Los

    February 25, 2020 8:11 pm

    Humans are pathetic, we might wipe each other out in less than 100,000 years and to think we'll see this? Maybe other life forms but not earth.

  21. Scott Gossett

    February 26, 2020 10:50 am

    Jesus christ… talk about hypotheticals. 8 years data to project 6billion years. Waste of time watching this. I hope nobody is getting paid for this information.

  22. Raizzor Kings

    February 27, 2020 9:52 pm

    Fake bullshit. There is no Hubble, just cgi bullshit. And a galaxy flying towards us?? Ooooooo, wow, you actually know this? Wow, there is no technology available that can detect anything outside of our own atmosphere. Effin idiots. 😂 Thanks for being the clowns that make us all laugh at your stupid posts. 😂😂😂 Idiots.

  23. Karen Beckman

    March 1, 2020 2:58 am

    Imagine if there was life on the triangulum galaxy just like us talking about how there are these two giant galaxies about to collide 😂

  24. Memes

    March 2, 2020 11:23 am

    What normal people see: Milky way and andromeda colliding.

    What weebs see:

    Milky way and andromeda kissing

    Triangulum Galaxy:


  25. Arash Ghasemi

    March 3, 2020 4:06 am

    Someone said sun will die sooner than 4 billion years… So how come it will be a part of a new galaxy ???

  26. Subscribe to me because idk why

    March 6, 2020 1:59 pm

    Our 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eat-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great grandchildren will see this.

  27. Florian Oprescu

    March 6, 2020 10:56 pm

    I'm sorry ESA, but our sun will run out of fuel by then and our planet will be gone as well.

  28. TheRadioman1947 WHITE

    March 6, 2020 11:19 pm

    all JESUS has to do is tell it to mover over and it will.he created time and spaces and all things in it, and i will be there with him and see it.

  29. The Rising Garden

    March 7, 2020 4:17 am

    Now that I truly think about it🤔

    What would the view be like from the Triangulum Galaxy while its watching?💫⭐️🌟✨⚡️

  30. iceberg789

    March 7, 2020 6:18 pm

    1:57 lies. solar may very well get sling shotted to somewhere else. or may get fried by big radiations due to too many objects coming closer.

  31. Nawang wulan

    March 7, 2020 6:32 pm

    All of modern science are bullshits. Jungle/primitive tribes have more accurate knowledges.

  32. Professor MAWillett

    March 8, 2020 11:05 am

    Unfortunately we won’t be around to view the merging and neither will our solar system.👽


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