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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

Comets

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

Celestial News & Events

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

Celestial News & Events

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.

Illustration of Jupiter Trojans

Solar System

Trojan Asteroids Are in a Class of Their Own

Hordes of debris trapped by Jupiter and Neptune have distinct colors that mark them as possibly the last remnants of the material that built the giant planets.

Jupiter, color-enhanced

Spacecraft and Space Missions

Jupiter’s Magnetic Field Has Weird Structure

Juno observations reveal that Jupiter’s magnetic field has a wacky plume.

Explore the Night with Bob King

Jupiter Shines with a Mighty Light

Jupiter's at opposition this week. Close and bright, it shines like a midnight version of Venus. No matter your scope, the biggest planet is always a crowd-pleaser.

Solar System

Hubble: Weather Watcher of the Outer Solar System

Hubble's powerful eye scouts the outer planets once an Earth year, shedding light on planetary weather, like Jupiter's Great Red Spot and Neptune's Great Dark Spot.

Jupiter's South Pole

Spacecraft and Space Missions

Amazing Storms, Jet Streams on Jupiter

NASA’s Juno spacecraft has found breathtaking cyclones at Jupiter’s poles and probed how deep the planet’s jet streams go.

Explore the Night with Bob King

Mars Flies By Jupiter in a Close Dawn Conjunction

The new year opens with the magnificent pairing of the solar system's largest planet with one of its smallest.

Jupiter's Great Red Spot

Solar System

Juno Probes Depths of the Great Red Spot

NASA’s Juno spacecraft peeked under the clouds of the most iconic weather feature in the solar system, Jupiter’s Great Red Spot, revealing a complex structure deep below the surface.

Explore the Night with Bob King

An Exquisite Venus–Jupiter Conjunction

Venus bids farewell at dawn, but not before a close encounter with returning Jupiter.

5th Jupiter flash on record

Planets

New Impact Flash Seen on Jupiter

Flash! A comet or asteroid fragment whacked Jupiter on May 26th. It's the sixth time that observers on Earth have witnessed an impact on the giant planet.

Curlicue Madness

Explore the Night with Bob King

Jupiter Close, Bright, and Up All Night

It's easy to like Jupiter. No other planet offers such a bounty of amazing sights through the telescope, especially this week when it reaches opposition.  On April 7th, the largest planet in the solar system will rise at sunset and shine all night. That's the date Jupiter lines up behind…

Solar System

Jupiter Returns with a Stormy Surprise

The gas giant is emerging in the glow of dawn sporting an tumultuous North Temperate Belt.

View of the Moon-Jupiter meeting, October 28, 2016

Celestial News & Events

Jupiter Greets Crescent Moon in the Pre-Dawn Sky

On Friday, October 28th, the waning crescent Moon and brilliant Jupiter get together for an early morning conjunction.

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