These four planets haven’t got a solid surface. They are made up of gases and liquids.

What planet is more than nine times the size of Earth but the planet is so light that it could float on an ocean of water.

The surface of the Sun, which is made from churning, hot gases.

A gigantic ring of clouds of gas emitted at speed that form around the outside of a supernova.

A meteor so large that it doesn’t burn up in Earth’s atmosphere but instead crashes into the Earth’s surface.

A planet outside the Solar system, not circling the Sun but another star

This is also known as the ‘Plough’ in Europe, and the ‘Big Dipper’ in North America, because it is shaped like a soup ladle.

1.28 seconds it take light to travel from the Moon to Earth

It takes light about 60 seconds to reach us from the Sun.

He invented a powerful telescope in 1789 to observe the stars and planets. He made these by making mirrors from smooth metal and eyepieces with magnification of up to 6450 times.

It is the first re-usable spacecraft – lifts off vertically, but glides in to land horizontally, like an aircraft.

stars that move with a tail (comets)

The first telescope was invented by Dutch spectacle maker

He discovered that planet’s orbits are ellipses, not circles

An ellipse contains two fixed points called ____

Galilean moons is a round depression formed on the surface of a planet, moon, or other space object by the impact of a meteorite.

A solar eclipse can occur

It is the slight back-and-forth shifting of star positions that occurs as we view the stars from different positions in Earth's orbit of the Sun.

A total solar eclipse can be seen