Travelling together around the sun

The other bodies that travel around the sun are

• moons

• asteriods

• comets

• all of them.

The gravity of the sun is

• weak

• strong

• normal

Each planet's paths around the sun is called an .......

The smallest planet Mercury has lots of .......

• craters

• asteriods

• meteroit

• comets

The biggest planet, Jupiter's diametre is ..... times bigger than Earth's.

• 9

• 10

• 11

• 12

Saturns has giant rings of ........ around it.

• substances

• matter

• solid

• liquid

Scientists are learning a lot about Mars so they send many ......

• satellites

• spacecraft

• space station

• space probes

A space probe called Curiosity is as big as a car, it moves over the ...... of Mars on Aungust 6,2012.

• craters

• matter

• orbit

• surface

The distance between the sun and the moon is ........

• close

• far

• medium

Astronomers think that there are ......... solar systems in our Milky Way galaxy.

• many

• little

• much