-
- Light, traveling at great speeds, still takes 2 seconds to travel from the Earth to the Moon.
-
- The bright red star at left is Alpha Centauri, the closest star to the Sun – just 4 light-years away.
-
- The light from many stars in our sky has been traveling for hundreds of years to reach us.
-
- The Andromeda Galaxy is the closest galaxy to the Earth, but it is still 2.3 million light-years away.
-
- The Hubble Ultra Deep Field captures the most distant galaxies every observed.