Solar System

The asteroid belt (main belt) is a torus-shaped region between Mars and Jupiter containing hundreds of thousands of rock...

A Coronal Mass Ejection is an enormous burst of plasma and magnetic field ejected from the Sun's corona into space, carr...

Dwarf planets meet criteria 1 and 2 of planethood but have NOT cleared their orbital neighborhoods—they share orbital sp...

The heliosphere is the vast bubble of solar wind and magnetic field surrounding the Solar System, separating it from int...

The Kuiper Belt is a disk-shaped region beyond Neptune (30-50 AU) containing thousands of icy bodies, short-period comet...

A magnetosphere is the region around a planet dominated by its magnetic field, where the field deflects the solar wind a...

Near-Earth Objects are asteroids or comets with orbits bringing them within 1.3 AU of the Sun, potentially crossing Eart...

Eccentricity (e) quantifies how elongated an orbit is, ranging from 0 (perfect circle) to 1 (parabola—unbound).

Inclination is the angle between an object's orbital plane and a reference plane (usually the ecliptic for Solar System ...

A solar flare is a sudden, intense burst of electromagnetic radiation from the Sun's surface, caused by magnetic energy ...

The solar wind is a continuous stream of charged particles (mostly electrons and protons) flowing outward from the Sun's...

Trans-Neptunian Objects are bodies orbiting beyond Neptune (>30 AU), including Kuiper Belt objects, scattered disk objec...

Trojan asteroids are objects trapped at a planet's L4 and L5 Lagrange points—stable gravitational equilibrium positions ...