NASA photo of a galaxy labelled UGC 1810 by itself. Together with its collisional partner it is known as Arp 273.

From Phys.org
"As you look outward into space, you're actually looking backwards in time.
The light you see from your computer is nanoseconds old. The light reflected from the surface of the Moon takes only a second to reach Earth. The Sun is more than 8 light-minutes away. And so, if the light from the nearest star (Alpha Centauri) takes more than 4 years to reach us, we're seeing that star 4 years in the past. There are galaxies millions of light-years away, which means the light we're seeing left the surface of those stars millions of years ago."

You need to login or register to write reviews. It's quick! We only ask four questions to new members.