Juno Archives

This JunoCam image of Jupiter’s moon Io captures a plume of material ejected from the (unseen) volcano Prometheus. Indicated by the red arrow, the plume is just visible in the darkness below the terminator (the line dividing day and night). The image was taken by NASA’s Juno spacecraft on October 15. NASA/JPL-Caltech/SwRI/MSSS

Astrogeology, Caves, Craters, Mountains, Subsurface, Lava Tubes, Imaging & Spectroscopy, Io, Jupiter, Press Release

Juno Will Make A Very Close Flyby of Volcanic World Io On Saturday

by Keith CowingDecember 29, 2023December 29, 2023

NASA’s Juno spacecraft will on Saturday, Dec. 30, make the closest flyby of Jupiter’s moon Io that any spacecraft has made in over 20 years. Coming within roughly 930 miles […]

Schematic of the observing routine on Jupiter by VLT/ESPRESSO on the 22 July 2019. The small circles represent the FOV of the fibre proportional to the size of Jupiter’s disk in the context of these observations (0.5 arc seconds in diameter for the size of the FOV), and their respective labels. We also included a grid to tentatively map the relative position of each observing position in latitude and longitude. Grid lines have intervals of 15∘ on both coordinates. The solid black line on the right side of the spherical grid represents the morning terminator, while the blue dotted line marks the location of the 12 h local time meridian. The picture of the planet’s disk was taken from the Planetary Virtual Observatory and Laboratory. Picture credits go to Gary Walker.

Astronomy & Telescopes, Atmospheres, Climate, Weather, Brown Dwarfs, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Jupiter, Press Release

Comparative Exolanetology: Jupiter Targeted By VLT/ESPRESSO Exoplanet Hunter

by Keith CowingDecember 26, 2023December 26, 2023

For the first time, an instrument to find planets light years away was used on an object in the Solar System, in a study on Jupiter’s winds.

This enhanced image of the Jovian moon Ganymede was obtained by the JunoCam imager aboard NASA's Juno spacecraft during the mission's June 7, 2021, flyby of the icy moon on Juno's 34th pass close to Jupiter. This is an extended, upscaled and artistically enhanced version of a previously released JunoCam image: PIA24681. larger image

Biosignatures & Paleobiology, Ganymede, Icy Worlds, Imaging & Spectroscopy, Press Release, Water/Hycean Worlds & Oceanography

Salts and Organics Observed on Ganymede’s Surface

by Keith CowingOctober 30, 2023October 30, 2023

Data collected by NASA’s Juno mission indicates a briny past may be bubbling to the surface on Jupiter’s largest moon.

Io, Europa, Ganymede, Callisto -- NASA.gov

Callisto, Europa, Ganymede, Icy Worlds, Io, Mapping, Geodesy, Cartography, Bathymetry, Missions & Hardware, Status Report

Source Of Radio Emissions Induced By The Galilean Moons Io, Europa and Ganymede: in situ Measurements By Juno

by Keith CowingAugust 11, 2023August 11, 2023

At Jupiter, part of the auroral radio emissions are induced by the Galilean moons Io, Europa and Ganymede. Until now, except for Ganymede, they have been only remotely detected, using […]

Astronomy & Telescopes, Biochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Ganymede, Icy Worlds, Imaging & Spectroscopy, Io, Press Release

Webb Telescope Offers New Views Of Ganymede And Io

by Keith CowingJuly 28, 2023

With its sensitive infrared cameras and high-resolution spectrometer, the James Webb Space Telescope (JWST) is revealing new secrets of Jupiter’s Galilean satellites, in particular Ganymede, the largest moon, and Io, […]

Biosignatures & Paleobiology, Callisto, Europa, Ganymede, Gas Giants, Icy Worlds, Imaging & Spectroscopy, Io, Jupiter, Missions & Hardware, Status Report, Water/Hycean Worlds & Oceanography

Jupiter Science Enabled by ESA’s Jupiter Icy Moons Explorer

by Keith CowingMay 7, 2023April 14, 2024

ESA’s Jupiter Icy Moons Explorer (JUICE) will provide a detailed investigation of the Jovian system in the 2030s, combining a suite of state-of-the-art instruments with an orbital tour tailored to […]

Europa, Icy Worlds, Imaging & Spectroscopy, Press Release, Water/Hycean Worlds & Oceanography

Juno Mission Captures Images of Europa

by Keith CowingDecember 17, 2022December 17, 2022

This view of Jupiter’s icy moon Europa was captured by JunoCam, the public engagement camera aboard NASA’s Juno spacecraft, during the mission’s close flyby on Sept. 29, 2022.

Europa, Icy Worlds, Imaging & Spectroscopy, Missions & Hardware, Press Release

Citizen Scientists Enhance New Juno Images Of Europa

by Keith CowingOctober 7, 2022

Science enthusiasts have processed the new JunoCam images of Jupiter’s icy moon, with results that are out of this world.

Europa, Icy Worlds, Imaging & Spectroscopy, Jupiter, Missions & Hardware, Press Release, Water/Hycean Worlds & Oceanography

Highest-Resolution Close-Up of Jupiter’s Moon Europa Yet By Juno

by Keith CowingOctober 5, 2022November 17, 2023

Observations from the spacecraft’s pass of the moon provided the first close-up in over two decades of this ocean world, resulting in remarkable imagery and unique science.