Galaxies

This is a complex question with an even more complex answer. But essentially there is no center of the universe according to current observations. If a center point were to exist, it would need to significant and special in a way that meant it was special to the whole universe collectively. So, this answer will … Read more Where is the center of the universe?

I live in Dallas, where we feel lucky to see Jupiter and Saturn. Is it possible to see the Andromeda galaxy with the unaided eye when in dark sky country? It is, as you obviously know, a function of relative brightness. The darker the night sky, the dimmer the objects that can be seen. In, … Read more Is it possible to see the Andromeda galaxy with the unaided eye when in dark sky country within Texas?

When I look up and see the Milky Way galaxy, am I looking towards the center of the galaxy or towards outer space? Tell me a good astronomy joke while you’re at it. That is a great question! In fact, you are generally looking into the DISC of the Milky Way galaxy. I’m sure you’ve … Read more When I look up and see the Milky Way galaxy, am I looking towards the center of the galaxy or towards outer space?

If the Universe is expanding and all galaxies are moving apart from one another, why is it that the Milky Way and Andromeda will one day collide? Thanks for the great question! To get to the answer, we will need to look at which forces operate on small and large astronomical scales (distances). The two … Read more In an expanding universe, why are Andromeda and the Milky Way destined to collide?