Space

A mosaic image shows magnetic activity on the solar disk, which is surrounded by the relatively faint corona.

New Research

A "Mangrove Forest" of Magnetism May Help Heat the Sun's Corona

New simulations might explain why the sun's atmosphere is bizarrely millions of degrees hotter than its surface

An artist's rendering of the Pluto system seen from the surface of one of its moons.

New Research

Weird Orbital Behaviors Offer Clues to the Origins of Pluto's Moons

Solving the mystery of these satellites could help astronomers understand "Tatooine" exoplanets that orbit binary stars

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Best Space Photos of the Week

See a Bubbly Nebula, an Artistic Earth and Other Spacey Treats

A celebratory star nest and a painterly view of home feature among our picks for this week's best space pictures

The Galileo spacecraft's view of the crazy cracks and brown gunk on Europa.

These Instruments Will Help NASA Figure Out If Life Can Thrive on Europa

The space agency has announced the suite of experiments that will fly on a mission to the icy moon of Jupiter

The last of the data from the New Horizons flyby won’t arrive until late 2016.

One Man's Lifelong Pursuit of Pluto is About to Get Real

When the New Horizons spacecraft races by the quasi-planetary body, Alan Stern will have finally met his match

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Best Space Photos of the Week

Dark Globs, a Salty Moon and More of This Week's Stellar Wonders

Mysterious star clusters and Europa in a can feature in our picks for this week's best space images

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Ask Smithsonian: How Many Rings Does Saturn Have?

The age, origin and purpose of Saturn's rings have mystified scientists since the days of Galileo

An artist's vision of a brilliant quasar at the core of a young galaxy.

Think Big

Rare Quartet of Quasars Found in the Early Universe

The quirky set of extremely bright black holes challenges theories for how the cosmos reached its current structure

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Best Space Photos of the Week

A Lopsided Supernova, Orbital Espresso and More Cosmic Wonders

An exploding star reveals its secrets and an astronaut takes a coffee break in this week's best space pictures

Humans traveling to Mars may need extra shielding for their brains.

New Research

A Trip to Mars Could Give You Brain Damage

Exposure to cosmic rays may cause defects that would make astronauts lose their curiosity during a mission

A shuttle astronaut's view of the International Space Station.

To Get Rid of Space Junk, Shoot It Down With Lasers

Proposals to send debris-targeting craft into orbit are piling up, and one mission may soon start test firing from the space station

Extreme Makeover: ISS Edition

How to give the International Space Station a little bit more room

Four of the astronauts who will be conducting spacewalks train at the Kennedy Space Center.

Behind the Scenes of the Last Mission to Repair the Hubble Space Telescope

Photographer Michael Soluri shares an intimate look at the team that saved the iconic observatory

Yum! A candy-colored view of the planet Mercury shows differences in its chemical makeup.

New Research

Earth May Have Become Magnetic After Eating a Mercury-Like Object

Swallowing a sulfur-rich protoplanet could help explain two lingering mysteries in the story of Earth's formation

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Best Space Photos of the Week

An Einstein Ring and an Asteroid "Dart" Are Among These Space Stunners

A lensed galaxy and a mission to manipulate a space rock feature among our picks for this week's best space images

When young planets collide.

New Research

The Moon Was Formed in a Smashup Between Earth and a Near Twin

But solving one puzzle of lunar origins has raised another linked to the abundances of tungsten in the primordial bodies

Best Space Photos of the Week

An Easter Typhoon and Galactic Ghosts Are Among These Spacey Visions

Astronauts spy a colossal eye and Hubble sees echoes of quasars past in our picks for the week's best space images

Best Space Photos of the Week

A Rocket Blessing and a Cubist Planet Are Among These Celestial Sights

Russia sends off the one-year crew and a Saturn probe gets artistic in our picks for this week's best space-related pictures

Best Space Photos of the Week

A Rainbow Eclipse and X-Ray Fireworks Are Among These Cosmic Treats

A solar eclipse painted the cloudy U.K. skies and an explosion rocked a stellar corpse in our picks for this week's best space images

"The show was another spectacular one! Reds and greens and yellows! The sky has just been on fire!" the photographer enthuses on Spaceweather.com.

Severe Solar Storm Paints the Sky Green on St. Patrick's Day

A burst of particles from the sun is hitting our atmosphere and lighting up the night as far south as Illinois

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