A small rocky body orbiting the sun.

A system of billions of stars, together with gas and dust, held together by gravitational attraction

The planet that is closest to the Sun

The last and smallest planet in the Solar System

A celestial object consisting of a nucleus of ice and dust and, when near the sun, ana “tail” of gas and dust particles pointing away from the sun

The third planet of the Solar System

A natural satellite of any planet

The collection of eight planets and their moons in orbit around the Sun, together with smaller bodies in the form of asteroids, meteoroids, and comets

The seventh planet in the Solar System

A celestial body resembling a small planet but lacking certain technical criteria that are required for it to be classed as such

An expert in astronomy/ a person who studies astronomy

An optical instrument used to observe objects that are far away.

The fifth and largest planet in the Solar System