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Neptune

A two-panel horizontal image. On the left is Neptune observed by the Hubble Space Telescope. It is a blue circle, tilted about 25° to the left. There are white smudges at 7 o’clock and just above 5 o’clock. At right is an opposing view of the planet, using data from Hubble and JWST. It is a multihued blue orb. There are white smudges in the same spots as the image on the left but also at the center of the planet and at the top. There are cyan smudges vertically along the right side, and the top of these areas is more translucent than the bottom.
Posted inNews

After 30-Year Search, Scientists Finally Find an Aurora on Neptune

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 10 April 202510 April 2025

The planet’s elusive aurorae are much colder than expected, which is how they evaded detection for so long.

The orange moon Titan passes in front of the striped disk of the planet Saturn, with Saturn’s rings seen edge on, forming a thin line between the moon and planet.
Posted inNews

Long-Gone Moon Could Explain Birth of Saturn’s Rings

Damond Benningfield, Science Writer by Damond Benningfield 20 October 202224 May 2023

Named Chrysalis, the moon could have disintegrated during a close encounter with the gas giant roughly 100 million years ago.

Uranus and Neptune as seen by Voyager 2
Posted inResearch Spotlights

A Unified Atmospheric Model for Uranus and Neptune

by Morgan Rehnberg 1 August 20221 August 2022

In a new model, three substantial atmospheric layers appear consistent between the ice giants.

Líneas de campo magnético simuladas en amarillo alrededor de la luna de Saturno Triton.
Posted inResearch Spotlights

Encontrando los océanos ocultos de las lunas usando campos magnéticos inducidos

by Morgan Rehnberg 5 May 20225 May 2022

Un análisis de componentes principales de modelos especulativos puede predecir con más seguridad que las técnicas anteriores la p^ppresencia de un océano subsuperficial en un objeto planetario.

The dark blue orb of Neptune is viewed by Voyager 2 at an upward angle from the south pole. A dark navy storm spot, the Great Dark Spot, is just to the right of the center of the planet, and white high-altitude clouds are scattered around the planet.
Posted inNews

Diagnosing Neptune’s Chilly Summer

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 28 April 202228 April 2022

A pandemic project analyzing a trove of infrared images revealed an unexplained phenomenon taking place in Neptune’s atmosphere.

Simulated magnetic field lines in yellow around Neptune’s moon Triton.
Posted inResearch Spotlights

Finding Moons’ Hidden Oceans with Induced Magnetic Fields

by Morgan Rehnberg 9 March 20225 May 2022

A principal component analysis of speculative models can more confidently predict the presence of a planetary object’s subsurface ocean than previous techniques.

An illustration of a spacecraft flying over Uranus
Posted inNews

The Ice Giant Spacecraft of Our Dreams

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 7 January 20203 December 2021

Scientists imagined some innovative technologies that could enhance a future mission to Uranus or Neptune.

Neptune imaged by Voyager 2 in 1989
Posted inNews

New Tiny Moon of Neptune Discovered

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 20 February 20194 April 2023

The moon’s size and orbit point to it being the remnant of a collision with Neptune’s moon Proteus.

Neptune crescent from Voyager 2
Posted inNews

Uranus and Neptune Should Be Top Priority, Says Report

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 14 December 201817 November 2021

Voyager 2 visited the ice giants in the 1980s, the only craft ever to do so. Planetary scientists argue that new missions to each planet would also benefit heliophysics and exoplanet research.

The interior structure of Neptune
Posted inNews

Diamonds Really Do Rain on Neptune, Experiments Conclude

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 15 September 201723 December 2021

Researchers subjected hydrocarbon samples in a laboratory to Neptune-like pressures. The samples, reminiscent of molecules found in the ice giant’s atmosphere, compressed into nanodiamonds.

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