Galaxies & Planetary Systems
True/False: A host star is a star that planets orbit around.
True
True/False: A planetary system is a space rock with lots of moons.
False- It is a star with planets & other objects orbiting around it.
How many planetary systems do we believe are in the Milky Way Galaxy...Billions or Millions?
Billions-we think there are about 300 to 400 billion stars in the Milky Way, and we now know almost all of them have planets orbiting around them!