Solor

1) What are the names of the Planets in our Solar System ?
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune

2) Is the Sun a planet or a star ?
A star, which gives out light. It's the closes star to Earth.

3) What is a Galaxy ?
It's a large group of stars.

4) What is the definition of the Universe ?
It is made up of billions of gallaxies.

5) What is the name of the galaxy that contains the Sun and Earth ?
The Milky Way which contains billions of stars.

6) What is Gravity ?
This is an invisible force that pulls you to the ground.
All objects have gravity and make a slight pull on other objects.
Huge objects like planets and stars have enough gravity to pull other things towards them.

7) What is Gravitational Force ?
This is the force caused by gravity.

8) Is there gravitational forces in a vaccuum ?
Yes. It does not depend on air.

9) Which planet has a larger gravitational force, Earth or Jupiter ?
The larger the planet the greater the gravitational force.
The gravity on Jupiter is twice as strong as the gravity on Earth.

10) How strong is the gravitational force from the Moon ?
High and low tides are caused by the gravitational force of the moon (and to a lesser extent the sun)

11) Why do moons orbit planets ?
Moons are moving quickly in a straight line, trying to fly away from the planet.
Meanwhile the planet's gravity is pulling the moon towards it. The two forces combine and the moon circles the planet.