Saturday, September 28, 2013

Planetary system

We just learned about the Interstellar Cloud.

We learned before that our solar system is our group of planets (like Earth and Mars)
spinning around our star which is called the Sun.

We use the word solar just for our Sun, not for other stars.

For other stars with planets that spin (or revolve) around them,
we use the name planetary system.

planetary system
(from: wikipedia - planetary system)

Kid Facts - Blast from the past: Saturn's Rings