Planets
Analyze This: Some 5,000 planets orbit stars other than our sun
A new cache of confirmed exoplanet discoveries marks a milestone in planets found beyond our solar system.
Planets
More Stories in Planets
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PlanetsMercury’s surface may be studded with diamonds
Billions of years of meteorite impacts may have transformed much of Mercury's graphite crust into precious gemstones.
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PlanetsLet’s learn about Pluto
Once known as a pipsqueak planet, Pluto is now the solar system’s best known dwarf planet.
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PlanetsNo, organic molecules alone don’t point to life on Mars
These carbon-based molecules, found in a meteorite, may reflect merely a mixing of water and minerals on the Red Planet over billions of years.
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SpaceThe long-awaited James Webb Space Telescope has a big to-do list
The James Webb Space Telescope has been in the works for so long that new fields of science have emerged for it to study.
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SpaceAstronomers may have found first known planet in another galaxy
The spiral-shaped Whirlpool galaxy may be home to the first planet spotted outside our own Milky Way galaxy.
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PlanetsNASA’s Perseverance rover grabbed its first Martian rocks
Two finger-sized pieces of stone drilled from a basalt rock are the first bits of Mars ready to be brought to Earth.
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PlanetsPluto is no longer a planet — or is it?
In the 15 years since Pluto lost its status as a planet, some scientists continue to use whatever definition works best for them.
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PlanetsJupiter’s intense auroras heat up its atmosphere
Jupiter’s hotter-than-expected upper atmosphere may be warmed by charged particles slamming into the air above the poles.
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SpaceThis image may be the first look at exomoons in the making
These observations offer some of the best evidence yet that planets around other stars have moons, or exomoons.