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Juno Stories

Mapping Io’s Hidden Heat With NASA’s Juno
2 min read

Description This graphic illustrates the areas of Jupiter’s moon Io sampled by the Microwave Radiometer (MWR) instrument aboard NASA’s Juno spacecraft during two close flybys. The black overlapping lines show the instrument’s footprints during Perijove 57 on Dec. 30, 2023,…

Jul 22, 2026
Article
NASA’s Juno Peers Beneath Io’s Surface
2 min read

Description This map represents data captured by the Microwave Radiometer (MWR) aboard NASA’s Juno spacecraft, indicating heat rising from just beneath the surface of Jupiter’s moon Io. While infrared instruments measure the temperature of the moon’s surface, the lowest frequency…

Jul 22, 2026
Article
NASA’s Juno Takes Temperature of Jupiter’s Fiery Moon Io
5 min read

Lee esta historia en español aquí.  NASA’s Juno mission has provided the first measurements of the temperature below the surface of Jupiter’s moon Io, revealing significant heating within the shallow subsurface of the most volcanically active world in the solar system.…

Jul 22, 2026
Article
NASA’S Juno Misson Captures Jupiter Moon Thebe
1 min read

Description NASA’s Juno spacecraft captured this view of Thebe, the second largest of Jupiter’s inner moons, during a close pass on May 1, 2026. The spacecraft’s Stellar Reference Unit (SRU) captured this image from a distance of approximately 3,100 miles…

May 5, 2026
Article
Europa’s Ice Shell (Artist’s Concept)
1 min read

Description This artist’s concept depicts a cutaway view showing Europa’s ice shell. It contains a shallow layer of small imperfections (cracks, pores, and voids) that extend down from the surface hundreds of feet. The icy moon of Jupiter is thought…

Jan 29, 2026
Article