NASA’s Juno spacecraft has been orbiting the gas giant planet Jupiter since July 4, 2016, and has already greatly increased scientists’ understanding of this fascinating world, the “King of Planets.” For the past while now, Juno has been in an elongated 56-day orbit, which brings the spacecraft close in over the cloud tops before swinging out farther away from the planet again. The plan had been for Juno to then switch to a closer, 14-day orbit, but due to growing concerns over another engine burn possibly resulting in a less-than-desirable new orbit, that plan has now been scrapped. Juno will now remain in its current orbit for the remainder of the mission.
The Juno spacecraft has sent back a beautiful new view of Jupiter’s “Little Red Spot,” a smaller and paler version of the Great Red Spot, which is an anticyclone in the atmosphere (a large-scale circulation of winds around a central region of high atmospheric pressure). Other complex cloud patterns can also be seen. The image was first taken on Dec. 11, 2016. The amazing full image is below:
As reported a few days ago, the Juno spacecraft orbiting Jupiter had entered safe mode, a precautionary turning off of all but vital instruments and other components when a software performance monitor induced a reboot of the spacecraft’s onboard computer. Now, Juno has successfully exited safe mode and is otherwise healthy and ready to continue its exploration of Jupiter.
NASA’s Juno spacecraft has been busy orbiting Jupiter and providing fantastic new views of this giant world, something not possible since the previous Galileo mission. While almost flawless so far, the mission has had a few hiccups recently. Juno entered safe mode just shortly before its next close flyby of Jupiter this week, apparently the result of a software performance monitor inducing a reboot of the spacecraft’s onboard computer. The spacecraft is otherwise healthy and Juno is conducting its own software diagnostics to determine the specific cause of the problem. Before this, Juno took its first observations deep into Jupiter’s turbulent atmosphere.
Intriguing new findings about Jupiter’s moon Europa were announced today by NASA, and while they don’t involve any direct evidence for life, they do provide more information on how scientists could better search for such evidence, without having to drill through the icy crust to the ocean below. The new observations, by the Hubble Space Telescope, have added to the evidence for active water vapour plumes on Europa – an exciting possibility, since they would possibly originate from the subsurface ocean, similar to the plumes on Saturn’s moon Enceladus. And just like the Cassini spacecraft has already done at Enceladus, those plumes – geysers really – could be sampled directly by a future spacecraft such as Europa Clipper.