5
Distant Galaxies
Images taken with a special
camera on the Hubble
Space Telescope show that
a distant galaxy could be as far
as 12.7 billion light-years away.
If you think that a single light-year
is 6 trillion miles (6,000,000,000,000),
then you’ll see we’re talking about
an astronomical distance!
Earth
Saturn
Uranus
Neptune
Jupiter
Mars
Jupiter has four large
moons—Io, Europa,
Ganymede, and Callisto
—which were discovered
by Galileo in 1610.
