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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

Exoplanets

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

Celestial News & Events

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

Celestial Objects to Observe

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.

NTB via Juno

Celestial News & Events

Stormy Times on Jupiter, Comet Howell Steps Up, and More

Colder weather might be coming, but don't pack away that telescope! You'll miss a powerful storm that's remaking Jupiter's North Temperate Belt, a returning comet, Mira on the rise, and a bright supernova in the Great Bear.

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

Solar System

Study Suggests Jupiter Could Have 600 Moons

New detections of candidate moons suggest that the king of planets could have hundreds of smaller satellites.

Venus-Jupiter conjunction

Celestial Objects to Observe

How Bright Are the Planets?

What do Venus and Jupiter have in common? Revisions to planets' magnitudes in this year's Astronomical Almanac have revealed some surprises.

Moment of impact

Explore the Night with Bob King

Texas Amateur Detects Possible Impact on Jupiter

It looks like Jupiter got slammed again! A bright flash from a possible impact lit up the planet's South Equatorial Belt Tuesday night. 

Flakey Red Spot

Explore the Night with Bob King

Jupiter Is Outstanding at Opposition

Prime-time Jupiter viewing kicks off this month when the planet reaches opposition on June 10th. 

Solar System

Astronomers Identify Weather Cycle on Jupiter

Astronomers have identified a periodic clearing at the gas giant's equator; amateurs may have spotted the change at the end of 2018.

Solar System

Future Planetary Probes Can Learn from Cassini

An unusual water composition at Saturn’s moon Phoebe means that future spacecraft will have to be on the lookout for different water ratios than we are used to on Earth.

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