Discover published sets by community

Earth's only permanent natural satellite. It affects Earth's tides and has phases due to its orbit around Earth.

The eighth planet from the Sun, known for its striking blue color. Neptune is an ice giant and has the fastest winds in the Solar System.

The Sun is a G-type main-sequence star at the center of the Solar System. It's the most important source of energy for life on Earth.

A type of compact star composed of neutrons resulting from the gravitational collapse of a massive star after a supernova. They are incredibly dense.

Originally classified as the ninth planet, Pluto is now considered a dwarf planet in the Kuiper belt. It has five known moons.

The largest object in the asteroid belt and the only dwarf planet located in the inner Solar System. It was the first asteroid to be discovered.

Icy bodies that release gas or dust. They are often characterized by their bright comas and long tails when near the Sun.

The galaxy that contains our Solar System, with a bar-shaped core and spiral arms. The Milky Way is part of the Local Group of galaxies.

A region of space where the gravity is so strong that nothing, not even light, can escape from it. The theory of general relativity predicts their existence.

The smallest and innermost planet in the Solar System. Mercury has a very thin atmosphere and no moons.

A region of space located between Mars and Jupiter filled with millions of rocky bodies. It's thought to be remnants from the Solar System's formation.

Second planet from the Sun, similar in structure but hotter than Earth. Its thick atmosphere traps heat in a runaway greenhouse effect.

The fourth planet from the Sun, known for its red color. Mars has polar ice caps and the largest volcano in the Solar System, Olympus Mons.

The seventh planet from the Sun, distinguished by its tilted rotational axis. Uranus is an ice giant with faint rings.

The explosive death of a star, resulting in a bright, short-lived astronomical event. Elements heavier than iron are created and dispersed during this event.

A highly magnetized, rotating neutron star that emits beams of electromagnetic radiation. This radiation can be observed when the beam points toward Earth.

The sixth planet from the Sun, notable for its prominent ring system. Saturn is a gas giant with many moons.

A diffuse nebula situated south of Orion's Belt. It's one of the brightest nebulae, visible to the naked eye in the night sky.

A spiral galaxy approximately 2.537 million light-years from Earth. It is the nearest spiral galaxy to the Milky Way and on a collision course with it.