Solar System

Curiosity is able to take pictures of itself on Mars using a camera mounted to its robotic arm. This mosaic was made from 55 snapshots taken in October 2012.

An Insider's Biography of a Celebrity Mars Rover

The chief engineer for Curiosity offers a peek at the NASA rover’s tumultuous rise to stardom in a new tell-all book

This Weekend, Astronomers Get Their Best Ever Look at an Oort Cloud Object

Looking at the Oort cloud is like looking back in time—a superpower hampered by the fact that the Oort cloud is very, very, very, very far away

Curtains of light weave across the sky over Fairbanks, Alaska, on September 12.

Powerful Solar Flare Paints the Sky With Candy-Colored Auroras

Two back-to-back flares sent clouds of charged particles racing toward Earth, creating auroras that may last through the weekend

The full moon is seen near Earth's horizon from the International Space Station.

Earth Is Making the Moon All Warm and Soft on the Inside

A new model boosts the notion that a layer of rock near the moon’s core is squishy and perhaps partially melted

A statue in front of the Holy Cross church in Warsaw, Poland, guides viewers toward the August 2014 supermoon.

Inspiring Photos of the Biggest, Brightest Supermoon of 2014

Feast your eyes on these snapshots from around the world

Titan’s Ocean Might Be as Salty as the Dead Sea

New data from the Cassini mission shows that the ocean under Titan's ice shell is likely very salty

Flatten Out the Moons and Planets, And You Can See Just How Big Earth Actually Is

Comparing their surface areas side-by-side gives a sense of scale to some of the solar system's inhabitants

The Sun Is Spraying Water Into Space

When the solar wind hits oxygen-rich rocks, water can form

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The Coolest Science of 2013, in GIFs

This year, we saw dissolving electronics, flying meteors, gravity-defying chains and rotting pineapples

A closeup of one of the rocks, with a patch of dust brushed away by Curiosity's instruments, that provides evidence of an ancient lake.

Curiosity Found Evidence of An Ancient Freshwater Lake on Mars

Drilling into Martian rock revealed that it formed at the bottom of a calm lake that may have had the right conditions for sustaining life

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Picture of the Week—Iron in the Sun’s Corona

The robotic Cassini spacecraft which is now orbiting Saturn looked back toward the eclipsed Sun and saw a view unlike any other.

Fantastic Photos of our Solar System

In the past decade, extraordinary space missions have found water on Mars, magnetic storms on Mercury and volcanoes on the moons of Saturn

Since early 2004, the Mars rovers have gathered images of rocks and terrain where water, the presumed prerequisite of life, once flowed (an artist's rendition).

Life Beyond Earth

An ocean on Mars. An Earth-like planet light years away. The evidence is mounting, but are astronomers ready to say we're not alone?

The surface of Wild 2 is pockmarked with craters.

Clues from a Comet

The first mission to collect space matter from beyond the moon offers insights into the solar system's creation

This image of the Sun's outermost layer, or corona, was taken June 10, 1998, by TRACE (Transition Region and Coronal Explorer). The Earth-orbiting NASA spacecraft, launched two months earlier, has an unobstructed view of the Sun eight months of the year. It is helping to solve the mystery of why the Sun's corona is so much hotter (3.6 million degrees Farenheit) than its surface (11,000 degrees Farenheit). TRACE is also shedding light on solar storms, which damage satellites and disrupt power transmissions.

Celestial Sightseeing

From Triton's active geysers to the Sun's seething flares, newly enhanced images from U.S. and foreign space probes depict the solar system as never before

9-planet solar system

Caution, Planets Ahead

The world's largest (maybe) 9-planet solar system model goes up along Route 1 in northern Maine

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Look! Up in the Sky! It's a Bird! It's a Planet. It's a Very Large Ball of Ice!

It's Pluto, with its moon, Charon

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