How do scientists know that galaxies change over time?

asked Apr 20, 2016 154k views

0 votes

7.0k points

Please log in or register to add a comment.

5 votes

They know from years and years of studying the galaxies... and watching their every move

Hope I helpe ^-^

Kzotin answered Apr 26, 2016

8.5k points

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers