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Solar System

What thorny ethical issues await us once we make it to Mars? A composite image of the red planet, composed by processing about 1000 Viking Orbiter red- and violet-filter images have been to provide global color coverage at a scale of 1 km/pixel.

Think Big

When Humans Begin Colonizing Other Planets, Who Should Be in Charge?

The biggest threat humans pose to other worlds is what we don’t know—or what we think we know, but don’t

Watch the moon from this moonscape in Craters of the Moon State Park, Idaho.

Fifteen Perfect Spots to Watch the Total Solar Eclipse as it Crosses the U.S. This Summer

One of the most exciting astronomical event in U.S. history is happening in August

New Research

Ancient Asteroid Collision Is Still Raining Space Rocks Down on Earth

A new study shows that today’s meteorites considerably differ from those of the ancient past

The bow-shaped wave on Venus

New Research

Scientists Spot Massive Wave in Venus’ Atmosphere

The 6,200-mile long bow-shaped wrinkle may have been caused by gravity waves

Three of Saturn's moons photographed by the Cassini spacecraft

New Research

Earth’s Moon Could Be Made From 20 Mini Moons

Our celestial buddy could have formed after multiple impacts—not one giant smash up

This collage of images from NASA's Cassini spacecraft shows Saturn's northern hemisphere and rings as viewed with four different spectral filters. Each filter is sensitive to different wavelengths of light and reveals clouds and hazes at different altitudes.

New Research

Check Out New Pictures of Saturn From Cassini’s Latest Orbit

New images of the ringed planet herald the spacecraft’s demise

The meteorite sample recovered near Perth in western Australia.

Cool Finds

Stargazers Help Track Down a Freshly Fallen Meteorite in Western Australia

A network of cameras and smartphone apps are helping Australian researchers hunt for space rocks

Two natural color images from NASA's Cassini spacecraft show the changing appearance of Saturn's north polar region between 2012 and 2016.

New Research

The Swirling Storm Above Saturn’s North Pole Changed Colors

The years-long shift may be a sign of changing seasons

The new dwarf planet—too small to join the ranks of our solar system's eight planets—orbits the sun roughly twice as far away as Pluto.

New Research

Say Hello to Our Solar System’s Newest Dwarf Planet

Spotting the dwarf planet could help in the search for Planet Nine

Cool Finds

After Two Years, Lost NASA Spacecraft Phones Home

Using the Deep Space Network, mission control has reestablished contact with the solar observatory STEREO-B

An artist's conception of four of the new planets, orbiting a single dwarf star. These small, rocky worlds are far closer to their star than Mercury is to our sun, but the star is smaller and cooler than our own.

New Research

Kepler Just Found 104 New Planets Outside of Our Solar System

Is anyone home?

Galaxy GN-z11 seen in its youth by the Hubble telescope. GN-z11 is shown as it existed 13.4 billion years in the past, just 400 million years after the Big Bang.

Life in the Cosmos

If Telescopes Are Time Machines, the JWST Will Take Us the Furthest Back Yet

The James Webb Space Telescope promises to peer back into the making of the first galaxies

A view of twilight on Pluto

New Research

New Evidence Strengthens the Case for Pluto’s Underground Ocean

Features on the dwarf planet’s smooth surface suggest that not all is frozen on that tiny, distant world

An artists' conception of a dust storm on Mars. New research may explain why the truly massive dust storms seem to occur irregularly on the Red Planet.

Mars Weather Forecast Calls for Massive Dust Storms — Here’s Why

Planetary-wide dust storms on Mars, lasting for months, may be linked to the motion of the Red Planet around the solar system.

Mercury’s northern volcanic plains shown in enhanced color to emphasize rocks types. The bottom left portion of the image displays large wrinkle ridges, formed during lava cooling. Near the top of the image, a bright orange region shows the location of a volcanic vent.

New Research

See Mercury’s Landscape in Stunning Detail

A new map of the planet’s surface captures the depths of craters and the peaks of volcanic mountains

An illustration of the path Mercury will take across the sun on May 9.

Cool Finds

For The First Time in a Decade, Watch Mercury Cross the Sun’s Face

Next week’s transit of Mercury is one of the major astronomical events of the year

The Hale Crater on Mars, one area where slope lineae occur

New Research

Boiling Water Could Explain Mysterious Dark Streaks on Mars

Researchers simulate some of the Red Planet’s unique features in an Earth-bound chamber

This artist's concept shows the distant dwarf planet Makemake and its newly discovered moon. Makemake and its moon, nicknamed MK 2, are more than 50 times farther away than Earth is from the sun.

Think Big

Hubble Spies a Tiny Moon Orbiting Dwarf Planet Makemake

Our solar system still has plenty of surprises

Avalanches may have triggered the jets of material spewing from Comet Hartley 2.

Avalanches on Comets May Help Make the Icy Bodies Visible

Tumbling rocks may have lit up Comet Hartley 2, allowing its discovery in 1986

The bright spots of Occator Crater are shown in enhanced color in this view from NASA's Dawn spacecraft.

New Research

New NASA Images Shed Light on Ceres’ Bright Spots

Yet the dwarf planet serves up fresh mysteries

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