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Jupiter Uranus 12P comet

Explore the Night with Bob King

Jupiter Meets Uranus in Twilight; Supernova Erupts in Nearby Spiral Galaxy

Jupiter aligns with distant Uranus before it exits the evening sky as a bright supernova flares in the southern galaxy NGC 3621.

Detailed image shows volcanoes on Io's surface

Astronomy in Space with David Dickinson

NASA's Juno Mission Makes Closest Flyby Past Io

Juno has revealed Jupiter's volcanic moon Io as never before.

GRS 2017 Juno

Explore the Night with Bob King

Jupiter's Great Red Spot Just Keeps Getting Smaller

Jupiter's Great Red Spot may be reaching a milestone this year by shrinking to its smallest size in recorded observational history.

Io, as imaged by Juno

Solar System

Striking New Views of Jupiter and Its Moon Io

The James Webb Space Telescope and Juno mission turned their eyes to Jupiter and its volcanic moon Io, revealing fine details.

Jupiter from NASA

Pro-Am Collaboration

How to Measure Jupiter's Deflection of Starlight

Get involved in an extraordinary experiment to test Einstein's theory of General Relativity — and you can do it from your backyard.

Jupiter, Ganymede, Europa and double shadows, March 25, 2019

Solar System

Astronomers Find a Dozen More Moons for Jupiter

The discovery of a dozen new moons for Jupiter makes the king of planets the king of moons, too — at least for now.

Auroral oval on Jupiter

Solar System

The Light Show of Jupiter’s Dark Side

The unique vantage point of NASA's Juno spacecraft has revealed a new side to Jupiter's auroras.

Jupiter up close

Explore the Night with Bob King

Jupiter's Exceptionally Close Opposition

A sentinel in the autumnal sky, Jupiter marks its closest opposition since 1963.

NGC 628 looks like a giant blue-gold maelstrom with a blue middle

Galaxies

Webb Reveals Jupiter, Puffy Planet, and Galactic Maelstroms in a New Light

Round out your week with these stunning views of the universe from the James Webb Space telescope.

Jupiter in infrared

Solar System

Why Are Jupiter's Rings So Thin?

Why does the biggest planet in the solar system have such flimsy rings? New research shows Jupiter's moons may be to blame.

Possible Jovian impact flash

Explore the Night with Bob King

Amateurs Spot New Impact Flash at Jupiter

An amateur astronomer has discovered a possible new impact flash in Jupiter's equatorial region. Observers may yet see the dark impact scar.

Jupiter, Ganymede, Europa and double shadows, March 25, 2019

Planets

The 12-Year Cycle of Jupiter Oppositions

Jupiter is at opposition on August 19th. If we take the long view — 12 years long — we can watch Jupiter's oppositions as it passes through the zodiac constellations.

Jupiter and GRS

Explore the Night with Bob King

Jupiter Dazzles at Its Brightest and Closest This Year

Jupiter comes to opposition on August 20th, when it will shine brighter and closer than at any other time this year. With nights starting earlier and cooler temperatures arriving, there's no better time to make the most of the planet.

Infrared Jupiter

Solar System

Sights and Sounds of the Solar System

Spacecraft are returning sights and sounds from Venus, Jupiter, and beyond — here's a sampling.

Europa eclipses then occults Io

Explore the Night with Bob King

Mutual Event Season Heats Up at Jupiter

Jupiter is usually the one occulting and eclipsing the Galilean moons, but this observing season the moons also eclipse and occult one another.

Great Red Spot vs. flake

Solar System

Jupiter's Great Red Spot Gets Smaller — But Stronger

"Flakes" coming off the Great Red Spot have had some wondering if this epic storm is coming to an end. But observations and computer modeling show it's only getting stronger.

Lost Jovian moon J 23

Solar System

Amateur Astronomer Finds “Lost” Moons of Jupiter

An amateur astronomer has recovered four of five "lost" Jovian moons.

Explore the Night with Bob King

Jupiter and Saturn Embrace in Solstice Conjunction

Jupiter and Saturn fashion the Great Conjunction of 2020 when they pair up on December 21st, the winter solstice. That evening they'll be closest in nearly 400 years.

Jupiter and Saturn in conjunction

Conjunction

Jupiter and Saturn Have Historic Dusk Encounter

Don't miss the upcoming close conjunction of Jupiter and Saturn on December 21st!

Jovian sprite

Solar System

Juno Discovers Sprites and Elves on Jupiter

NASA's Juno spacecraft has captured ultraviolet images of a rare atmospheric phenomenon in Jupiter's atmosphere.