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Red dwarf star with large convective cells at left, while at right looms the bulk of an Earth-size terrestrial planet colored in mottled brown and hanging onto a thin, blue veneer of an atmosphere

Exoplanets

Astronomers Discover New Earth-size World Only 40 Light-Years Away

This nearby terrestrial world might just reveal the secrets of atmospheric composition and habitability for planets like Earth and Venus.

Star engulfing planet

Exoplanets

Astronomers Reopen the Mystery of a Planet That Shouldn’t Exist

New research may have revived the mystery of 8 Ursae Minoris b, a seemingly doomed exoplanet that shouldn’t exist.

Lavaworld

Exoplanets

Planet Candidate Could Be Incandescent with Lava Flows

A new planet candidate discovered in data from NASA's TESS mission could be an extreme lavaworld, pushed and pulled by the gravity of its own star and two other close-in planets.

Illustration of an exoplanet around a white dwarf with a debris disk

Exoplanets

JWST Photographs Possible Giant Planets Around White Dwarfs

JWST has directly imaged two giant exoplanets orbiting white dwarf stars. This discovery may reveal the fate of our solar system.

a blue arc on top looms over an active, lumpy-looking star

Exoplanets

Hubble Reveals Possible Water-Vapor World

New Hubble Space Telescope observations reveal the warm sub-Neptune GJ 9827d might have a steamy atmosphere.

a blue orb with a red ring at its top on a black background

Exoplanets

Unexplained Auroras Found on a Lonely Brown Dwarf

James Webb Space Telescope observations of a faint, giant world have revealed the signature of aurorae — even though the world has no star.

An artist's representation of the six-planet system on black with multi-color geometrical pattern in the background

Exoplanets

Six Sub-Neptunes Discovered 100 Light-Years Away

Astronomers have uncovered six sub-Neptune exoplanets dancing in lock-step around the same distant star, shedding light on their formation.

artist's impression of weird inflated planet

Exoplanets

Webb Telescope Peers into Puffy Planet with Clouds of Sand

A mere 200 light-years away, there's a planet with the density of styrofoam and clouds of sand. How did it get so weird?

Terrestrial Synestia (art)

Exoplanets

Two Worlds Have Ended in a Planetary Collision — and a New One Has Begun

A star's sudden brightening and, two years later, its sudden dimming point to a cataclysmic collision between two large worlds.

Artist's concept shows blue-streaked surface of a massive solid planet

Exoplanets

How Did Two Hot and Super-dense Neptunes Form?

Astronomers have discovered two Neptune-size planets that are denser than rock and in searingly close orbits to their star. How did these odd worlds form?

Illustration of an exoplanet planet and its red cool dwarf star on a black background that is speckled with some small stars. The planet is large, in the foreground on the right and the star is smaller, in the background at the lower left. The planet is various shades of blue, with wisps of white scattered throughout. The left edge of the planet (the side facing the star) is lit, while the rest is in shadow. The star has a bright red glow

Exoplanets

Hubble, Webb Data Hint at Ocean Worlds

Data coming from the Webb and Hubble space telescopes suggests two exoplanets might be water worlds. But the evidence isn’t yet definitive.

Artist's illo of airless TRAPPIST-1c and red dwarf star host in background

Exoplanets

Exoplanet News: No Air on Venus Twin, Young Jupiter Discovery

Astronomers have discovered Jupiter's younger sibling in a system 88 light-years away. Meanwhile, only 40 light-years away, a Venus-size world turns out to be airless (or nearly so).

Habitable-zone planet that looks much like Earth (art)

Exoplanets

Where to Look for Life: Homing in on the Habitable Zone

Scientists are refining the definition of the habitable zone in an effort to aid future efforts at finding life.

Giant planets around a small, red-colored star

Exoplanets

Giant Planets Around Small Stars

Leading theories say giant planets shouldn’t be able to form around very low-mass stars. But a new study finds that, nevertheless, they do.

Visualization of airless TRAPPIST-1b and its red dwarf star host

Exoplanets

Exoplanet TRAPPIST-1b Has No Atmosphere

The TRAPPIST exoplanets offer the James Webb Space Telescope some of the best opportunities to observe rocky worlds. But Webb images show the innermost planet b has no atmosphere.

Exoplanets

New Planets in the Neighborhood

A planet-hunting consortium is marking five successful years by releasing data on more than 50 worlds.

Dark planet with translucent atmosphere in front of bright star

Exoplanets

JWST Investigates an Exoplanet "Corgi"

The James Webb Space Telescope has found the tiny tail of a close-in exoplanet that's losing its atmosphere.

Illustration of a planet and its star on a black background. The planet is large, in the foreground at the centre, and the star is smaller, in the background and also at the centre. The planet is rocky. The top quarter of the planet (the side facing the star) is lit, while the rest is in shadow. The star is bright yellowish-white, with no clear features.

Exoplanets

Webb Telescope Confirms Earth-size Exoplanet, Tries to Sniff Its Air

The James Webb Space Telescope has confirmed its first exoplanet, a rocky Earth-size planet, and attempted to take the measure of its atmosphere.

WASP-39b artist's illustration

Exoplanets

Webb Telescope Surveys a Hot Saturn

A collection of five research studies delve into the atmosphere of exoplanet WASP-39b as astronomers seek to better understand the chemistry of a world beyond the solar system.

White dwarf surrounded by debris disk (art)

Exoplanets

Ancient White Dwarf Hosts Planetary Graveyard

Scientists have discovered one of the oldest planetary graveyards in the Milky Way: a cool white dwarf "polluted" with rocky debris.