Solar System

Aphelion is the point in an object's orbit farthest from the Sun, where orbital velocity is slowest.

Apogee is the point in an object's orbit around Earth that is farthest from Earth (analogous to aphelion for Sun orbits)...

Asteroids are rocky remnants from the Solar System's formation, too small to be rounded by gravity, predominantly found ...

Comets are icy bodies from the outer Solar System that develop spectacular tails when approaching the Sun as their ices ...

The ecliptic is the apparent path of the Sun across the celestial sphere over a year, representing Earth's orbital plane...

A meteor is the visible light phenomenon ("shooting star") when a meteoroid enters Earth's atmosphere at high speed and ...

A meteorite is a meteoroid fragment that survives atmospheric entry and lands on Earth's surface, providing direct sampl...

A meteoroid is a small rocky or metallic object in space, typically debris from asteroids or comets, ranging from dust g...

Perigee is the point in an object's orbit around Earth that is nearest to Earth.

Perihelion is the point in an object's orbit nearest to the Sun, where orbital velocity is fastest.

A planet is a celestial body orbiting a star, massive enough to be rounded by its own gravity, and has cleared its orbit...