Cosmic structure Active
Andromeda Galaxy
Andromeda, or M31, is the Milky Way’s nearest major spiral-galaxy neighbour, a Local Group member roughly 2.5 million light-years away.
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Universe
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Celestial body Active
Earth
Earth is the third planet from the Sun and the largest of the terrestrial planets. It is the only known place inhabited by living things and the...
Celestial body Active
Europa
Europa is one of Jupiter’s four large moons and the planet’s fourth-largest moon. Its icy surface and measurements pointing to a salty ocean bene...
Celestial body Active
Jupiter
Jupiter (JPL 599) is the fifth planet: a rapidly rotating gas giant with a hydrogen-helium atmosphere, an intense magnetosphere, moons, and faint...
Cosmic structure Active
Laniakea Supercluster
The Laniakea Supercluster is a large collection of clusters, groups, and galaxies; the Local Group lies on its outer edges.
Cosmic structure Active
Local Group
The Local Group is a galaxy group including the Milky Way, Andromeda, and more than 50 other galaxies, on Laniakea’s outer edges.
Celestial body Active
Mars
Mars (499) is the fourth planet from the Sun: a rocky, cold, dusty desert world with a very thin atmosphere, seasons, polar ice caps, extinct vol...
Celestial body Active
Mercury
Mercury is the closest planet to the Sun and the smallest planet in the solar system. JPL identifier 199 corresponds to a rocky world with a 2439...
Cosmic structure Active
Milky Way
The Milky Way is our home galaxy, a spiral galaxy with a stellar disk spanning more than 100,000 light-years.
Celestial body Active
Moon
The Moon is Earth's only natural satellite. It is a differentiated rocky body with a core, mantle, and crust, orbiting Earth at an average distan...
Celestial body Active
Neptune
Neptune is the eighth and most distant planet in the solar system: an ice giant discovered in 1846 through mathematical predictions. It has a dyn...
Cosmic structure Active
Observable Universe
The Observable Universe is the cosmic setting studied by cosmology, whose history extends from early inflation to the present accelerating expans...
Celestial region Active
Orion Nebula
The Orion Nebula, or M42, is a nebula in Orion and a nearby star-forming region that can be seen without optical aid from a dark-sky site.
Celestial body Active
Sagittarius A*
Sagittarius A* is the supermassive black hole at the center of the Milky Way, with a mass of about four million times that of the Sun.
Celestial body Active
Saturn
Saturn is the sixth planet from the Sun and the second-largest in the solar system. It is a gas giant composed mostly of hydrogen and helium, kno...
Planetary system Active
Solar System
The Solar System includes the Sun, eight planets, five officially named dwarf planets, hundreds of moons, and thousands of asteroids and comets.
Celestial body Active
Sun
The Sun is a yellow dwarf star about 4.5 billion years old, composed mainly of hydrogen and helium. Located at the center of the solar system, it...
Celestial body Active
Uranus
Uranus is the seventh planet from the Sun, an ice giant that rotates on its side. It has 13 faint rings; NASA lists 29 recognized moons as of Aug...
Celestial body Active
Venus
Venus is a cloud-shrouded planet, a nearby planetary neighbor of Earth, and NASA describes it as the hottest planet in the solar system. Its carb...
Cosmic structure Active
Virgo Cluster
Virgo is the nearest large galaxy cluster to the Local Group, containing over a thousand galaxies, hot gas and dark matter, with M87 in its centr...
Celestial body Active
1I/'Oumuamua
The first known interstellar object to visit the Solar System, discovered on 19 October 2017 and officially designated 1I/2017 U1.
Celestial body Active
1I/ʻOumuamua
1I/ʻOumuamua was the first confirmed interstellar visitor to the Solar System. Discovered in 2017, it yielded trajectory and brightness measureme...
Celestial body Active
3I/ATLAS
3I/ATLAS is the third confirmed interstellar object observed crossing the Solar System. Its open trajectory and cometary activity offer a way to...