Solar System

After Curiosity unexpectedly cracked open a Martian rock, it revealed yellow crystals that scientists determined were elemental sulfur.

NASA's Curiosity Rover Accidentally Discovers Sulfur Crystals on Mars

The rover’s wheel cracked open a rock and revealed pure elemental sulfur, which researchers have never seen on the Red Planet before

Meteors fly above Sydney, Australia, on July 28, 2022. The Southern Delta Aquariids will be easiest to see from the Southern Hemisphere, but will still be visible at southern latitudes in the United States.

How to Watch the Southern Delta Aquariids Meteor Shower

Though not as prolific as the Perseids, this annual spectacle is 'scientifically interesting' because its comet of origin remains a mystery

An artist's rendition of the eight planets in our solar system. The planets are depicted closer together than they really are.

Astronomers Propose New Criteria to Classify Planets, but Pluto Still Doesn't Make the Cut

The new definition would define planets based on mass, rather than more ambiguous shape and size characteristics

The European Space Agency's Planetary Defense Office tracks and observes near-Earth objects passing by our planet, such as those shown in this illustration. 

Two Massive Asteroids Will Fly Past Earth This Week. Here's What to Know

Within 42 hours of each other, the pair of large asteroids, which both have no chance of impacting our planet, will approach Earth as they orbit the sun

Jupiter's Great Red Spot is a large storm that has persisted for at least 190 years.

Jupiter's Signature Red Spot May Have Evolved More Than Once

The planet's massive storm, known as the Great Red Spot, seems to be different from a spot first observed at roughly the same location in the 17th century, a new study finds

An artist's rendering of the Voyager 1 spacecraft entering interstellar space.

After Months of Glitches and Gradual Fixes, Voyager 1 Is Fully Operational Once Again

Currently 15 billion miles away from Earth, one of NASA’s longest-tenured spacecraft is back from the brink after a technical failure last year put its future in question

Purple squares illustrate auroras on Mars, as detected by NASA’s MAVEN orbiter between May 14 and May 20. The brighter the purple, the more auroras present.

Mars Was Hit With a Solar Storm Days After Earth's Aurora Light Show, NASA Says

Studying this event could hold lessons for scientists about how to protect astronauts from radiation on future trips to the Red Planet

Captured by the Hubble Space Telescope, the heliosphere of a young star, LL Orionis, collides with an interstellar medium of dust. A similar event with our own sun, researchers say, might have occurred between two and three million years ago.

A Giant Interstellar Cloud May Have Once Enveloped Earth, Potentially Causing Ice Ages

Astronomers suggest this cold, dense cloud compressed our sun's protective field between two and three million years ago, leaving the Earth exposed to cosmic material

A simulated perspective of Olympus Mons, the tallest volcano in the solar system, with water frost at its peak.

Astronomers Discover Water Frost on Mars' Tallest Volcanoes

On early winter mornings, a thin layer of ice forms in craters atop the Red Planet's towering peaks, near its equator, according to a new study

The northern lights appear near Saskatoon in Saskatchewan, Canada, on May 11, 2024.

Missed the Auroras in May? Here’s How to See Them Next Time

Three veteran aurora chasers and a NASA scientist share everything you need to know to check these dazzling displays off your bucket list

An illustration of our solar system's planets in a line. This week, six planets appeared to be in a line from Earth's perspective, but they did not acutally align in space.

Missed the 'Parade of Planets'? These Upcoming Alignments Will Likely Be Better, Anyway

Astronomers tempered expectations of the celestial event this week, pointing to others in the near future as more exciting opportunities for sky watchers

A computer-generated model of Sif Mons, a volcano on Venus. The new study found evidence of recent volcanic activity at Sif Mons and the Niobe Planitia region.

Venus Might Still Have Active Volcanoes, as Recent Lava Flows Suggest 'Ongoing' Eruptions

Astronomers have again discovered evidence of recent volcanic activity on Earth's sister planet in data from the 1990s

An illustration of the sun's magnetic fields overlaid on an image of the sun captured by NASA's Solar Dynamics Observatory in 2016.

Researchers Trace the Origin of the Sun's Magnetic Field, Shedding Light on Space Weather and Solar Cycles

In a new study, scientists suggest the sun's magnetic field originates much closer to the star's surface than previously thought, a finding that could boost predictions of solar activity

A composite image of Jupiter, taken by the Juno spacecraft

The Seven Most Amazing Discoveries We’ve Made by Exploring Jupiter

The giant planet is a world of extremes

From Latourell, Oregon, the northern lights appear as ribbons of color in the night sky on May 11.

See 12 Breathtaking Images of the Northern Lights, Spotted in Shocking Places Over the Weekend

A period of unusually strong solar activity meant the colorful aurora borealis could be seen much farther south than normal

An angled view of the solar system with main asteroid belt discoveries in green and near-Earth objects in light blue.

Scientists Discover 27,500 Asteroids in Old Telescope Images Using A.I.

While most of the team’s new finds are located in the main asteroid belt, about 100 are near-Earth asteroids that pass close to our planet's orbit

The Eta Aquarids appear to originate from a bright star in the constellation Aquarius.

How to Watch the Dazzling Eta Aquarid Meteor Shower, Bringing an Unusual 'Outburst' to Skies This Weekend

This year's spectacle will be more impressive than usual, as the Earth passes through a concentrated clump of 3,000-year-old comet debris

This false-colored image of Mercury reflects the varying age and mineral composition of the surface.

The Seven Most Amazing Discoveries We’ve Made by Exploring Mercury

Only two robotic missions have made it to the Swift Planet, but they were crucial for upending many false assumptions of that sun-scorched world

Antarctic meteorite (HUT 18036) is found partially submerged in ice, as opposed to resting atop the surface. 

Meteorites Are Becoming Harder to Find as They Sink Into Antarctica's Melting Ice

The disappearing space rocks are burying valuable clues into the history and composition of our solar system, according to a new study

The Lyrids are slated to peak on April 21-22, though the moon will be nearly full, which could make the meteors more difficult to see.

How to Watch the Brilliant Lyrid Meteor Shower This Month

Fiery streaks will illuminate the night sky from April 15-29, with the spectacle's peak occurring from April 21-22

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