Planets

Astronomers Find What May Be First Exomoon—And It's an Absolute Unit

Astronomers suspect that there's Neptune-sized celestial body trailing an exoplanet about 8,000 light years

An artist’s conception of a distant Solar System Planet X, which could be shaping the orbits of smaller extremely distant outer solar system objects like 2015 TG387.

New Discovery Stirs Up Signs of the Elusive Planet 9

A new minor planet called "the Goblin" is the second most distant known object in the solar system

Illustration of NASA's Transiting Exoplanet Survey Satellite (TESS) observing an M dwarf star with orbiting planets.

TESS Space Telescope Will Find Thousands of Planets, but Astronomers Seek a Select Few

NASA's new space telescope has already discovered two planets, but the hunt for a world like Earth is just getting started

Jupiter's Magnetic Field Is Super Weird and Has Two South Poles

Analysis of data from the Juno probe shows the giant planet's field is much different from our own and suggests it has a dissolved core

An eroded area of the Medusae Fossae Formation.

Most of Mars' Dust Comes From One Place

Erosion of the Medusae Fossae Formation has, over billions of years, likely covered the entire planet in 10 feet of volcanic dust

Jupiter Officially Has 12 New Moons

The new satellites are mostly tiny and include one oddball that is on a collision course with some of the 78 other moons orbiting the planet

A 2018 colorized image of Jupiter's south pole created by citizen scientist Gabriel Fiset, using data from NASA's Juno spacecraft.

How Jupiter May Have Gifted Early Earth With Water

A new model of the solar system suggest we have gas giants to thank for our watery world

These two views from NASA’s Curiosity rover, acquired specifically to measure the amount of dust inside Gale Crater, show that dust has increased over three days from a major Martian dust storm. The images were taken by the rover’s Mastcam.

Massive, 'Unprecedented' Dust Storm Puts Mars Rover at Risk

Engineers have not received any transmissions from the Opportunity rover since Sunday

An illustration of lightning on Jupiter's northern hemisphere, using an image from the JunoCam.

Jupiter's Lightning Is More Earth-Like Than We Thought

Juno is providing scientists with new insights into the gas giant's flashes of light

The imagined surface of Kepler-186f, an Earth-size planet orbiting a small red star.

NASA's New Exoplanet Travel Bureau Lets You 'Tour' Far-Distant Planets In 360 Degrees

Eager space tourists can now visit sunny Kepler-186f, a moon of Kepler-16b or the Earth-like TRAPPIST-1e virtually

Illustration of Sedna, a minor planet with an unusual orbit.

Is the Mysterious Planet Nine Just a Swarm of Asteroids?

Researchers investigate alternative explanations for wacky orbits of objects in our solar system

Artist’s impression of satellites and debris in low-Earth orbit. Currently 70 percent of all cataloged objects are in low-Earth orbit, which extends to 2000 km above the Earth’s surface.

Greening the Future of Outer Space

A team of scientists and policy experts want to develop space sustainably for future generations

Pluto, and its largest moon Charon, as seen from the New Horizons spacecraft.

Is Pluto Actually a Mash-up of a Billion Comets?

Researchers speculate the beloved dwarf planet could actually be a giant comet

Images of 2015 BZ509 captured by the Large Binocular Telescope Observatory.

Is This Backwards-Orbiting Asteroid an Interstellar Visitor?

The space rock could have been captured from another star system during the early days of our solar system

This test image from one of the four cameras on TESS captures a portion of the southern sky along the plane of our galaxy.

200,000 Stars Twinkle in First Test Image From NASA’s Planet-Hunting Satellite

Once its cameras are calibrated, TESS will capture 400 times as much sky as this test image

Venus shines brightly in the distance in this picture taken on the International Space Station.

Venus and Jupiter May Meddle With Earth's Orbit and Climate

In 405,000-year cycles, the tug of nearby planets causes hotter summers, colder winters and drier droughts on our home planet

Gaia's all-sky view of our Milky Way Galaxy and neighboring galaxies, based on measurements of nearly 1.7 billion stars.

New Star Map Could Change Everything We Know About the Milky Way

The map includes 1.7 billion stars and is already revealing new details about star evolution and the formation of our galaxy

Five Things to Know About NASA's New Planet-Hunting Satellite

TESS will scan the skies in search of the next crop of exoplanets

A piece of the Almahata Sitta in Sudan

Diamonds Trapped in Strange Meteorite Came From Solar System's Earliest Planets

Impurities in the diamonds could only have formed within a planet the size of Mercury or Mars

What's the Difference Between Moths and Butterflies and More Questions From Our Readers

You asked, we answered

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