Main Sequence

Four rocky planets much smaller than Earth orbit Barnard's Star, the next closest to ours after the three-star Alpha Centauri system. Barnard's is the nearest

The Sun is the star of our solar system. Its gravity holds Earth and our planetary neighbors in its orbit. At 865,000 miles (1.4 million km) in diameter, it's

The celestial body is the youngest transiting planet found to date.

Using the James Webb Space Telescope, astronomers have potentially discovered the first brown dwarfs beyond the borders of the Milky Way galaxy.

"The supernova was named 'supernova Hope' since it gives astronomers hope to better understand the universe's changing expansion rate."

The discovery of an Earth-like planet 4,000 light years away in the Milky Way galaxy provides a preview of one possible fate for our planet billions of years in the future, when the sun has turned into a white dwarf, and a blasted and frozen Earth has migrated beyond the orbit of Mars.

Bindu Rani had childhood dreams of flight. Today she lifts her gaze even higher, helping researchers study stars, planets beyond our solar system, and black

New images of Jupiter's volcano-studded moon Io, taken by the Large Binocular Telescope on Mount Graham in Arizona, offer the highest resolution of Io ever achieved with an Earth-based instrument. The observations were made possible by a new high-contrast optical imaging instrument, dubbed SHARK-VIS, and the telescope's adaptive optics system, which compensates for the blurring induced by atmospheric turbulence.

Large Binocular Telescope's observations of eruptions on volcanically active moon rival those from space

Using NASA's Transiting Exoplanet Survey Satellite (TESS) and many other telescopes, two teams of astronomers have discovered a temperate, Earth-sized exoplanet orbiting a cool red dwarf called Gliese 12.

Sometime between May and September, a white dwarf is expected to go thermonuclear.

55 Cancri e is a super-Earth planet that appears composed of diamond-like carbon — now, thanks to the JWST, astronomers have found the world has "grown" a...

Zombie white dwarf stars keep their heavy metal exteriors fresh by constantly cannibalizing any smaller objects in their dead planetary systems, like comets ...

Achoo! Baby stars "sneeze" to rid themselves of excess energy during their formation process, astronomers using the ALMA telescope array have found.

NASA calls it a 'once-in-a-lifetime' opportunity to catch a glimpse of this exploding star

These astronomical outlaws are journeying through the abyss with secrets from a distant realm.

A nova named T Coronae Borealis is expected to decorate the night sky between February and September 2024 for the first time in 80 years. Here's how you can ...

Star clouds peppered with stellar nurseries form a huge, wave-like structure in the Local Arm of our galaxy. And now astronomers discovered its doing the wave. The post Star clouds in the Milky Way are doing the wave first appeared on EarthSky.

Astronomers may finally know why some death shrouds created by the deaths of sun-like stars lack the element sulfur.

Images of possible planets around white dwarf stars suggest that some gas-giant worlds survive the deaths of their stellar host