21–40 of 266 results
Planet formation (artist's concept)

Exoplanets

Youngest Confirmed Exoplanet Provides Clues on Its Formation

Observations of the youngest confirmed planet, CI Tau b, suggest it's still hot from its birth — a point in favor of a quick-start model of formation.

PDS 70 (art)

Exoplanets

Astronomers Directly Detect Newborn Planets

Infant planets are coming together in a system 370 light-years away, and they’re shedding light on the early lives of Saturn and Jupiter in our solar system.

Exocomets around Beta Pictoris (art)

Exoplanets

Found: Exoplanet in the "Neptunian Desert" & Exocomets Around Beta Pictoris

Two teams of astronomers have announced the discovery of a Neptune-size planet in an unexpected orbit and three exocomets whizzing around nearby star Beta Pictoris.

August 2012 issue of Sky & Telescope

Exoplanets

Solar System "Twin" Is Missing Its Baby Jupiters

Exceptional new images of the LkCa 15 system, a young, Sun-like star thought to host infant gas giant planets, shows those planets don't exist.

Kepler 47 (artist's concept)

Exoplanets

Third Planet Found Orbiting Binary Star System Kepler 47

Astronomers have found a third planet circling a pair of stars in the Kepler 47 system.

HR 8799e (artist's impression)

Exoplanets

Best View Yet of Baby Giant Exoplanet

Astronomers have taken the best spectrum yet of exoplanet HR 8799e, a gas giant in its infancy.

Super-puff exoplanet

Exoplanets

Inflating a Super-Puff Planet

Super-puffy exoplanets are a problem. They shouldn’t exist — and yet we've detected half a dozen of them. Here's what theory might be getting wrong.

Exoplanets

Tilted Exoplanets Could Explain Odd Orbits

Scientists think a significant fraction of exoplanets may be rolling on their sides. If they were, it would explain a longstanding mystery.

Sub-Saturn (art)

Exoplanets

Scientists Question Popular Planet Formation Theory

New studies are challenging the core accretion theory, the primary model astronomers use to understand how worlds form in our solar system and beyond.

Confirmed TESS exoplanets

Exoplanets

NASA’s TESS Mission Announces New Planets, Supernovae

The TESS mission announces eight confirmed planets along with hundreds of exoplanet candidates.

Exoplanets

Exploring the Escaping Atmosphere of HAT-P-11b

The atmospheres of planets close to their host stars live a tenuous existence. New observations from the Hubble Space Telescope show signs of a Neptune-like exoplanet’s atmosphere being eroded away.

Illustration of planet transit

Exoplanets

Amateur Planet Hunters Have a New Online Resource

A database run by the American Association of Variable Star Observers will organize and archive data on transiting exoplanets collected by amateur astronomers.

Illustration of surface of planet orbiting Barnard's star

Exoplanets

A Chilly Super-Earth May Orbit Barnard's Star

One of the closest stars to the Sun hosts a planet at least three times as massive as our own where temperatures might be just low enough to freeze liquid water.

Exoplanets

Planets Appear More Massive Than Disks Where They Form

Infant worlds might gobble up dust quickly, the interstellar environment might feed protoplanetary disks, or planet-building dust could be hiding in plain sight. Although disks of gas and dust around young stars are a necessary precursor to planet formation, an expanded survey of stars in our Galaxy confirms earlier doubts…

Illustration of Kepler-1625b and exomoon in transit

Exoplanets

Hubble Boosts Case for Exomoon

Exoplanet Kepler-1625b might harbor a moon the size of Neptune—potentially the first confirmed exomoon—but researchers urge caution.

Art: a super-Earth we could call Vulcan

Exoplanets

Super-Earth Discovered in (Fictional) Vulcan System

Thirty years ago, Gene Roddenberry, of Star Trek fame, and three astronomers made the case that the orange-hued star 40 Eridani A ought to host Vulcan, Mr. Spock's home. Now, a robotic survey has discovered a planet around that very star.

Beta Pictoris b

Exoplanets

Astronomers "Weigh" Beta Pictoris b

Astronomers have a precise new mass measurement for Beta Pictoris b, a young gas giant still in the throes of formation 63 light-years from Earth.

Hottest Jupiter

Exoplanets

Iron and Titanium Found in Ultrahot Jupiter

New observations provide solid evidence of heavy metals in a gas giant exoplanet’s atmosphere.

Exoplanets

Planet Formation Caught in the Act

A team of scientists has captured evidence that PDS 70b, the first directly imaged instance of early planet formation, is actively accreting material, and they’ve measured the rate at which it’s growing.

Brown Dwarf with Aurora

Exoplanets

Auroras Discovered Around Rogue Brown Dwarf

Astronomers have discovered auroras around a set of brown dwarfs — including one that wanders the galaxy by itself — indicating surprisingly strong magnetic fields in these failed stars.

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