141–160 of 345 results


An Atmosphere of Heavy Metals

Researchers have found strong evidence of titanium oxide in the atmosphere of a hot giant planet, adding new insights to the complex motions of these planets’ extreme atmospheres.

Tau Ceti system


Four Exoplanets Might Orbit Sun-like Star

Astronomers have used an innovative technique to discover four super-Earth-size planet candidates orbiting Tau Ceti, a Sun-like star 12 light-years away.

Saturn's moons


Best Exomoon Candidate Yet?

Astronomers have found one of the best exomoon candidates in data collected by the Kepler spacecraft.



New Age Estimate for TRAPPIST-1

A new study suggests that the seven-planet dwarf star could be much older than the Sun.


How Do Earth-Sized, Short-Period Planets Form?

Matching theory to observation often requires creative detective work. In a new study, scientists have used a clever test to reveal clues about the birth of speedy, Earth-sized planets.


Rogue Planets: Not as Plentiful as Thought

A new study finds that rogue planets — those floating free in the galaxy, unbound to any star — are not as plentiful as we once thought.

hot Jupiter WASP-121b


Exoplanet Might Have Ozone-like Layer

Astronomers have potentially detected a stratosphere in the atmosphere of a hot Jupiter.


Discovery of a Free-Floating Double Planet?

An object previously identified as a free-floating, large Jupiter analog turns out to be two objects — each with the mass of a few Jupiters. This system is the lowest-mass binary we’ve ever discovered.


A Partly Cloudy Exoplanet

Direct imaging of exoplanets was once only possible for the brightest of planets orbiting the dimmest of stars — but new observations of the Jupiter-like exoplanet 51 Eridani b provide tantalizing clues about its atmosphere.

Exoplanet Family Tree


Kepler Team Releases Final Exoplanet Catalog

The most comprehensive and detailed exoplanet catalog released yet marks the end of an era for Kepler, the planet-hunting telescope.

Hottest Jupiter


KELT-9b: Hottest Hot Jupiter Exoplanet Yet

Astronomers announce the discovery of bloated gas giant KELT-9b, the hottest "hot Jupiter" exoplanet known orbiting a short-lived massive star.

Giant ringed planet


Help Astronomers Track a Giant, Ringed Planet

The possible discovery of a massive ringed planet in Orion needs confirmation — and amateur astronomers can help.

trappist-1 orbits


Seventh TRAPPIST-1 Planet Confirmed

Astronomers have confirmed the existence of the seventh planet around the ultracool dwarf star TRAPPIST-1.

Warm Neptune HAT-P-26b


Watery Skies of "Warm Neptune" Hint at Planet's Formation

Astronomers have detected water in the cloud-free skies of "warm Neptune" HAT-P-26b, a clue in the larger mystery of how these planets formed.


Gravitational Lensing Reveals "Iceball Earth" 13,000 Light-Years Away

Astronomers have discovered an "iceball Earth" orbiting a star 13,000 light-years away. Multiple eyes on the sky have revealed some of this world's secrets.

LHS 1140 b


Welcome to LHS 1140b: A Super-Earth in the Habitable Zone

The MEarth exoplanet survey nabs LHS 1140 b, a rocky planet transiting its host star just 41 light-years distant.

artist's concept of TRAPPIST-1 system


Seven-Planet Star Hides Age, Might Be Deadly

The star with seven exoplanets puts out enough high-energy radiation to tear away the inner planets’ atmospheres in a few billion years.


Find New Worlds, Film an Eclipse & Do Some Citizen Science!

Hankering to discover new solar systems or understand our own? These citizen science projects and public data troves will help you fill your free time.

illustration of TRAPPIST-1 planet sky


Seven Earth-Sized Planets Found Orbiting Dim Star

Astronomers have found seven Earth-sized planets around a cool red dwarf, all of which have the potential for liquid surface water.

TW Hydrae


Hubble Catches Exoplanet Shadow Play

A unique method reveals the influence of a planet within the stellar disk around TW Hydrae.