AS 101 - September 13, 2011
What makes up the universe?
Mostly empty space
But, many kinds of astronomical objects, gaseous clouds, dust, energy and
even dark matter in space
Sun: A large, glowing ball of gas that generates energy through nuclear fusion.
Planet: A moderately large object, which orbits a star, it shines by reflected light.
Planets may be rocky, icy, or gaseous