1)planets, solar system
2)moons
3)galaxy
4)comet
5)satellite
1) All the planets in our solar system are 4.5 billion years old
2) Jupiter has 63 satellite. The largest. Ganymede, is bigger than Mercury.
3) The stars in the milky way, the system to which the sun belongs, number in hundreds of billions.
4) The gas tail of a galaxy always points away from the sun.
5) The firts communications comet orbited the earth every 2 hours and 37 minutes.
Объяснение:
