Planets
Definitions
In Space
Numbers
Facts
100

This planet is closest to the sun.

What is Mercury?

100

This is the centre of the solar system. The planets revolve around it.

What is the Sun?

100
It is made up of the Sun and its family of nine planets.

What is the solar system.

100

This is how long it takes the moon to circle Earth.

What are 24 hours?

100

A tool that will help see more detail about a small area of the sky. 

What is a telescope?

200

This planet was downgraded to a dwarf planet.

What is Pluto?
200

These are loose collections of rocks and frozen gases that orbit between the planets. 

What are comets?

200

This is  the galaxy that we live in. 

What is the Milky Way?

200

This is how long it takes Earth to circle the Sun.

What are 365 days?

200

This planet has the most moons; 63 to be exact.

What is Jupiter?

300

This planet is sixth from the Sun. It is best known for the beautiful system of rings that circle the planet.

What is Saturn?

300

This is another name for the study of space. 

What is astronomy?

300

These objects produce and give off their own heat and light.

What are stars?

300

The Sun is this hot. 

What is 10,000 F or 5,600 C

300

An object that looks like a streak of light in the sky but is a small chunk of rock passing through Earth's atmosphere.

What is a meteor?

400

This planet is seventh from the Sun. Unlike other planets, this planet lies on its side. It is greenish in colour and has nine faint rings with five moons orbiting the planet. 

What is Uranus?

400

These are patterns of stars in the sky that, to some people, seem to be in the shapes of pictures.

What are constellations?

400

These are chunks of rock and metal that orbit between the planets. 

What are asteroids?

400

This many Earths can fit inside the Sun.

What is 1,000,000?

400

When tons of matter gather at the center of the galaxy, these are formed.

What are black holes?

500
This planet is eighth from the Sun. It can only be seen through a telescope. Little is known about this distant planet.

What is Neptune?

500

This is a body that does not give off light of its own. It reflects the light of the sun.

What is a planet?

500

These have a bright head and long, shining tail. They shine partly because of light absorbed and re-radiated from the Sun and partly because of reflected sunlight.

What are comets?

500

It takes this many minutes for sunlight to reach Earth.

What is 8 minutes?

500

These two things cause the Earth to experience seasons. 

What is the tilt of the Earth and its revolution around the Sun?