Planets

Saturn's moon Mimas has a giant impact crater, named Hershel, that stretches across a third of its surface and makes it resemble the "Death Star" from Star Wars.

An Icy Moon of Saturn May Be Hiding a Vast Ocean Under Its Crust, Surprising Astronomers

Researchers suggest a global ocean lies 15 miles beneath the surface of Saturn's "Death Star" moon, Mimas—a shocking discovery that could redefine what a habitable world looks like

An artist’s rendering of a pantheon of planets similar to Earth

This Planned NASA Telescope May Help Us Identify Worlds Like Our Own

The innovative Habitable Worlds Observatory will offer ways to detect signs of life on other planets

A photo of Ingenuity taken by the Perseverance rover in April 2023. The helicopter arrived on Mars attached to Perseverance in February 2021.

NASA's Ingenuity Mars Helicopter Has Taken Its Final Flight

Originally designed for up to five flights on Mars, Ingenuity performed 72 over three years, until one of its rotor blades was damaged during landing on January 18

An artist's impression of the planet orbiting its star with the trail of gas behind it. The planet, called WASP-69b, completes one orbit in less than four days.

This Distant Exoplanet Has a 350,000-Mile-Long Tail, Like a Comet

A stream of particles flung from the planet's star is causing its atmosphere to boil away and lose 200,000 tons of mass per second

A photo of Saturn taken by the Hubble Telescope last October. Small dark marks called ring spokes are visible on the planet's left side, just inside the widest black band of space between rings.

What Are These Mysterious Dark 'Spokes' on Saturn's Rings?

A Hubble image highlights the seasonal features, which scientists think could be caused by interactions between the planet's magnetic field and solar wind

Uranus with its rings and moons, showcasing storms and a polar ice cap on the planet. The new Webb image was produced by combining longer and shorter exposures.

See the James Webb Telescope's Stunning New Image of Uranus With Its Rings and Moons Clearer Than Ever

The gleaming ice giant could soon become a top priority for exploration

Saturn's moon Enceladus, represented in a composite of several images taken by NASA's Voyager 2 probe

Life-Sparking Gas Strengthens Evidence That Enceladus, a Moon of Saturn, Could Be Habitable

Evidence of hydrogen cyanide in data from the Cassini spacecraft adds to a growing list of molecules that could, in theory, support life on the icy moon

For the inner four planets in this solar system, each planet orbits the sun three times for every two orbits of the planet immediately to its outside. For the fourth, fifth and sixth planets, they orbit four times for every three orbits of its outer neighbor.

Astronomers Discover Rare Solar System Where Planets Orbit in Mathematical Harmony

The "resonant" planets could provide insight about how such systems form and evolve—and why our own solar system is not synced up

The James Webb Space Telescope's first image of Saturn.

Saturn's Rings Will Temporarily Disappear From View in 2025

From Earth’s perspective, we’ll be looking at the gas giant’s rings edge-on, making them nearly impossible to see

The asteroid sample that is now on display at the National Museum of Natural History. By studying the retrieved space rocks, scientists aim to better understand how water and organic material first arrived on Earth.

How to See NASA's Bennu Asteroid Sample in Person

A tiny piece of the space rock made its public debut at the Smithsonian National Museum of Natural History, as scientists study the rest of the sample

An artist's rendition of the collision between Earth and the protoplanet Theia, which, according to the prevailing theory, resulted in the moon's formation.

Mysterious Lumps in Earth's Mantle May Be Remains of the Crash That Formed the Moon

Chunks of a protoplanet called Theia became lodged within Earth after the two worlds smashed together, new computer simulations suggest

An image of Pluto taken by the New Horizons spacecraft in 2015

A Supervolcano on Pluto May Have Spewed Ice Just a Few Million Years Ago

An unusual crater on the dwarf planet hints at past volcanic activity—and a possible vast ocean beneath its surface, scientists say

Previous analyses of seismic activity on Mars suggested its core was surprisingly large, with a low density. Two new studies suggest the opposite.

Mars' Core May Be Smaller Than Thought, Wrapped in a Sea of Molten Rock

Based on seismic waves from a meteorite impact, two teams of scientists suggest the Red Planet has another layer deep beneath its surface

The statue of the Little Prince outside Villa Albertine’s Fifth Avenue headquarters

New 'Little Prince' Statue Sits Near Central Park and Gazes Up at the Stars

Antoine de Saint-Exupéry wrote and illustrated much of the beloved novella while living in the city in the 1940s

The capsule holding the asteroid sample shortly after touching down in the desert on September 24 at the Department of Defense's Utah Test and Training Range.

A Sample of Ancient Asteroid Dust Has Landed Safely on Earth

NASA's OSIRIS-REx mission retrieved bits of rock and dust from the asteroid Bennu, which could help scientists uncover the origins of life on our planet

The James Webb Space Telescope will help scientists look for signs on life on other planets.

What Would Signal Life on Another Planet?

Astronomers have long debated what kind of chemistry might serve as a bona fide alien biosignature

An artist's rendition of exoplanet K2-18 b and the dwarf star it orbits. New observations from the James Webb Space Telescope support the idea that the world, discovered in 2015, has a hydrogen-rich atmosphere and water ocean.

This Exoplanet May Be a Distant Ocean World, James Webb Telescope Finds

The observatory detected evidence of methane and carbon dioxide—and tentatively observed a molecule that, on Earth, is only made by living things

The surface of Mars’ Pontours rock contains a network of hexagonal mud cracks that hints at historical seasons of flooding and drying.

Mud Cracks on Mars Hint at Conditions That Could Have Formed Life Long Ago

Hexagonal ridges on the Red Planet's surface suggest an ancient cycle of wet and dry periods, ideal for creating molecules necessary for cells

An artist's rendition of the highly reflective exoplanet LTT 9779 b orbiting its host star.

This Mirror-Like Exoplanet Is the Most Reflective Ever Discovered

The ultra-hot world is wreathed in metallic clouds that prevent the planet from evaporating and keep its atmosphere intact

The James Webb Space Telescope's first image of Saturn.

See the James Webb Telescope's First Image of Saturn and Its Rings

The new shot also features three of the planet's many moons, including Enceladus, a strong candidate for hosting life

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