Another, named PSR J1719-1438 b, is believed to be made entirely out of crystal diamond. A member of a Jupiter class of planets that orbit very close to their stars — “hot Jupiters” — is ...

Saturn is best known for its rings, which are made of chunks of ice and rock. Uranus and Neptune are the furthest planets from the Sun. They are known as the Ice Giants. Uranus is the coldest ...

Hand-carved arrowheads and jagged spears made of obsidian, a sharp rock formed by volcanic magma, are remnants of vast prehistoric trade networks that once cut across western North America.

what planets are made of, and what makes a planet suitable for life. This also guides planetary scientists in their search for other habitable (or inhabited!) worlds in our solar system and beyond!