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The proposals assessed total more than 1.7 million satellites. In simulations, their effects could complicate ground-based observations; the resu...
Two astronomy resources show how very different observations are organized: Gaia maps stars and other objects, while NASA maintains an encycloped...
Astronomy news spans small bodies, possible magnetic fields on exoplanets and cosmic-ray data, while an ESO study warns of devastating consequenc...
ESO warns that current satellite-constellation proposals, including some extremely bright objects, could have devastating consequences for astron...
Amid abundant videos, headlines and specialist pages, NASA Ciencia provides an official Spanish-language starting point for astronomy and space-e...
Andromeda, or M31, is the Milky Way’s nearest major spiral-galaxy neighbour, a Local Group member roughly 2.5 million light-years away.
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...
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...
Jupiter (JPL 599) is the fifth planet: a rapidly rotating gas giant with a hydrogen-helium atmosphere, an intense magnetosphere, moons, and faint...
The Laniakea Supercluster is a large collection of clusters, groups, and galaxies; the Local Group lies on its outer edges.
The Local Group is a galaxy group including the Milky Way, Andromeda, and more than 50 other galaxies, on Laniakea’s outer edges.
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...
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...
