If the Universe is expanding, then why do galaxies collide?

Опубликовано: 31 Декабрь 2024
на канале: Dr. Becky

85,123

3.9k

The Universe started in the Big Bang and ever since then space has been expanding - increasing the distance between galaxies ever since. Galaxy mergers are also very common though - so how does this happen if galaxies are always moving apart from each other?

#bigquestions

My book ' Space: 10 Things You Should Know' is out NOW worldwide (except for US & Canada - more info soon) you can find it in your local bookshop or order it here: http://bit.ly/SpaceDrBecky

-----------

Follow me on Twitter: / drbecky_
And on Instagram: / drbecky_s

Don't forget to subscribe and click the little bell icon to be notified when I post a new video!

---------

Dr Becky Smethurst is an astrophysicist researching galaxies and supermassive black holes at Christ Church at the University of Oxford.

http://drbecky.uk.com