A comet is a relatively small solar system body that orbits the sun. When close enough to the Sun they display a visible coma (a fuzzy outline or atmosphere due to solar radiation) and sometimes a tai [..]

Asteroids are small solar system bodies that orbit the Sun. Made of rock and metal, they can also contain organic compounds. Asteroids are similar to comets but do not have a visible coma (fuzzy outli [..]

The asteroid belt lies roughly between the orbits of Mars and Jupiter in the Solar System. It is home to a large amount of irregular shaped asteroids that range in size from dust through to the dwarf [..]

An astronaut (also known as cosmonaut) is someone trained to be a crew member of a spacecraft. While the word astronaut usually refers to space travel professionals it can also include normal people w [..]

An object orbiting the Sun that is large enough to be rounded by its own gravity but is not gravitationally dominant in its orbital area and is not a moon. There are currently five recognized dwarf pl [..]

Earth is the fifth largest planet in the Solar System and third from the Sun. It was formed around four and a half billion years ago and is the only place in the Universe where life is known to exist.

A galaxy is a large group of stars, dust, gas and dark matter held together by gravity. They vary in size with some containing millions of stars while others could contain as many as a trillion. They [..]

Halley’s Comet (or Comet Halley as it is also known) is the most well known comet in the Solar System. It orbits the Sun and can be seen with the naked eye from Earth around every 75 years, returning [..]

Jupiter is the largest planet in our solar system. It features the famous ‘Red Spot’ and a large number of orbiting moons.

Mars, or the 'Red Planet' as it is sometimes known, is the fourth planet from the Sun. It features a dusty, rocky surface, relatively calm conditions and a thin atmosphere.