Jupiter

Jupiter's moon Ganymede is the largest moon in the solar system and is even wider than the planet Mercury.

An Ancient Asteroid Smashed Into Jupiter's Moon Ganymede and Tipped It Over, Study Finds

The cataclysmic impactor was 20 times the size of the rock that wiped out the dinosaurs on Earth

An artist’s depiction of HD 189733b encountering an eruption of x-rays from the star it’s orbiting

This Nearby Exoplanet Is Hot, Dangerous—and Smells Like Rotten Eggs

Located about 64 light-years away from Earth, the world is the first place astronomers have detected hydrogen sulfide outside our solar system

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

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

Europa’s icy surface hides an ocean of liquid water underneath, making it a prime target in the search for extraterrestrial life.

See the Messages NASA Will Send to Space on Its Upcoming Mission to Europa

A metal plate affixed to the Europa Clipper is engraved with a poem, tributes to scientists and waveforms representing the word "water" in 103 languages, among other drawings

An artist's rendition of the Europa Clipper mission, set to launch to Europa in October. The mission could provide new insights about the life-supporting potential of the moon, which hosts a massive saltwater ocean beneath its icy surface.

Jupiter's Moon Europa May Have Less Oxygen Than Previously Thought

The new findings could have implications for whether Europa's vast ocean contains the conditions necessary to support life

Io, Jupiter's third-largest moon, photographed by NASA's Juno spacecraft.

See Detailed New Images of Io From Another NASA Flyby of the Solar System's Most Volcanic World

The stunning views show lava flows and volcanic plumes, as scientists seek to learn what causes such volatile conditions on the moon of Jupiter

A view of Jupiter's moon Io captured by NASA's Juno spacecraft on December 30, 2023.

NASA Captures Stunning Images of Jupiter's Moon Io on Closest Flyby in 20 Years

The Juno spacecraft's instruments will help scientists better understand volcanic activity on the volatile moon's surface

A Quadrantid meteor flies through the sky, as captured by NASA's All Sky cameras.

What to See in the Sky in January: Meteor Showers, Planets and Comets

From the Quadrantids to a "swarm of stars," here are the celestial spectacles you won’t want to miss this month

An artist's concept of a simulated view from the rough, icy surface of the moon Europa with Jupiter looming over the horizon.

Jupiter's Moon Europa May Contain Carbon, a Crucial Ingredient for Life

The James Webb Space Telescope found carbon dioxide on Europa's surface, and astronomers say it likely originated in the moon's vast ocean

An artist's depiction of one of NASA's Voyager spacecraft entering interstellar space.

NASA Hears 'Heartbeat' From Voyager 2 After Losing Touch With the Distant Probe

The space agency has been trying to contact the 46-year-old craft after accidentally causing its antenna to point two degrees away from Earth

U.S. Poet Laureate Ada Limón wrote a poem that will be brought to Jupiter's moon Europa.

Read the Poem NASA Will Send to Jupiter's Moon Europa

Alongside Ada Limón's words, you can add your name to the spacecraft that will search for life on the icy moon

Saturn's rings and five of its moons, as captured by the Cassini spacecraft in 2011. The five moons, from left to right, are Janus, Pandora, Enceladus, Mimas and Rhea.

Saturn May Have Just Won the 'Moon Race' With 62 More Discovered

It will likely reign supreme as our solar system's planet with the most moons from now on, astronomers say

The rocket carrying the Jupiter Icy Moons Explorer launches from French Guiana on April 14. 

Juice Mission Launches to Explore Jupiter and Its Icy Moons

The spacecraft will investigate oceans that might lie beneath the moons' surfaces and study whether they could support life

Skywatchers can see five planets this week.

How to Watch Five Planets Align in the Night Sky This Week

Mercury, Venus, Mars, Jupiter and Uranus will appear as if in a parade in the Western sky on Tuesday

During World War II, Executive Order 9066 authorized the incarceration of 120,000 Japanese Americans (above: In Los Angeles in April 1942, dozens of families wait for a train to Manzanar War Relocation Center in Owens Valley, California).

Japanese American Artists Recall the Trauma of Wartime Incarceration

Smithsonian podcasts explore the legacy of Executive Order 9066 and the camera that almost didn’t make it to the Juno spacecraft launch

An enhanced-contrast image of Jupiter and its moon Ganymede taken by NASA's Cassini spacecraft in 2000.

Jupiter Reclaims Title of Planet With the Most Moons

After the discovery of 12 new moons, the gas giant now has 92 known natural satellites—and scientists expect to find more

HAARP's antennas

Why Scientists Are Sending Radio Signals to the Moon and Jupiter

Researchers conducted wide-ranging experiments at Alaska's HAARP facility, known for atmospheric research and conspiracy theories

James Webb Space Telescope composite image of Jupiter 

See the James Webb Space Telescope’s Stunning New Images of Jupiter

Its Near-Infrared Camera captured auroras, moons and the Great Red Spot

Europa became an interest to researchers as a place that potentially could harbor life after observations from Earth-bound telescopes and space probes found evidence of an ocean 10 to 15 miles beneath the icy surface. This drawing illustrates a possible water pocket within the ice that may contribute to ridges forming on the moon's surface.

Europa's Icy Shell May Be Habitable for Life

The moon of Jupiter could have shallow water pockets within its frozen surface

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