81–100 of 328 results

Spacecraft and Space Missions

TESS's First Year of Science

NASA’s latest exoplanet hunter has found more than two dozen new worlds, at least one of which might be habitable.

Exomoon (art)


Exomoon or No Exomoon?

Last October, the first discovery of a potential exomoon was announced. But is Kepler-1625b-i an actual moon in another solar system? Or just an artifact of data reduction?

Planet formation (artist's concept)


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)


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)


Found: Exoplanet in the "Hot Neptune 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


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)


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)


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


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.


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)


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


NASA’s TESS Mission Announces New Planets, Supernovae

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


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

Pro-Am Collaboration

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


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.


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


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


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


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


Iron and Titanium Found in Ultrahot Jupiter

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