artificial satellite

• A manmade spacecraft.

• The imaginary line that the Earth spins around.

• Lumps of rock orbiting the Sun left over from when the Solar System formed.

asteroid

• Dust particles frozen in ice that orbit the Sun.

• Lumps of rock orbiting the Sun left over from when the Solar System formed.

• A small lump of rock in orbit around the sun.

astronomer

• A scientist who studies only planets

• A scientist who studies only stars

• A scientist who studies space.

axis

• The imaginary line that the Earth spins around.

• A squashed circle or oval shape.

• A non-contact force that acts between two masses.

comet

• Lumps of rock orbiting the Sun left over from when the Solar System formed.

• Dust particles frozen in ice that orbit the Sun.

• A small lump of rock in orbit around the sun.

constellation

• Planets in orbit around a star other than our Sun.

• A number of stars and the solar systems around them grouped together.

• A collection of stars that make a pattern in the sky.

day

• The time it takes a planet to make one full spin on its axis.
• The length of time it takes for a planet to orbit the Sun.
• The period on one section of the Earth or other planet when it is facing away from the Sun.

dwarf planet

• Dust particles frozen in ice that orbit the Sun.

• A small lump of rock in orbit around the sun.

• Lumps of rock orbiting the Sun left over from when the Solar System formed.

Earth

• A rocky inner planet, second from the Sun in our Solar System.

• A rocky inner planet, fourth from the Sun in the Solar System.

• A rocky inner planet, third from the Sun in the Solar System.

ellipse

• A squashed circle or oval shape.
• An eclipse that happens when the Earth comes between the Sun and the Moon.
• An eclipse where the Moon comes between the Sun and the Earth.