juno-01
What will happen when NASA spacecraft Juno
gets close to the biggest, baddest planet 04 July 2016?

Getting there

Juno will begin studying Jupiter in low orbit the fourth. There are many unknowns. What will Jupiter do to Juno?

A scary video [link]

Let's learn more from the Juno mission web site. Plenty to explore there. For example, the "Spacecraft and Instruments" link.

Juno mission home page [link]

(For help nanigating NASA sites see this [link])

Lucky us — a video describing exploration of Jupiter's magnetic field was published 29 June with this description: "Published on Jun 29, 2016 NASA is sending the Juno spacecraft to Jupiter, to peer beneath its cloudy surface and explore the giant planet's structure and magnetic field. Juno's twin magnetometers, built at Goddard Space Flight Center, will give scientists their first look within Jupiter at the powerful dynamo that drives its magnetic field. In this interview, Deputy Principal Investigator Jack Connerney discusses the Juno mission and its magnetometers."

Exploring Jupiter's magnetic field [link]

Quoting from the explanation published with the video: "NASA's Juno spacecraft has crossed the boundary of Jupiter's immense magnetic field. Juno's Waves instrument recorded the encounter with the bow shock over the course of about two hours on June 24, 2016. "Bow shock" is where the supersonic solar wind is heated and slowed by Jupiter's magnetosphere. It is analogous to a sonic boom on Earth. The next day, June 25, 2016, the Waves instrument witnessed the crossing of the magnetopause. "Trapped continuum radiation" refers to waves trapped in a low-density cavity in Jupiter's magnetosphere."

Jupiter roars [link]

Quoting from the explanation published with the video: "Published on Jun 9, 2016 - A new study using data from Chandra X-ray Observatory has shown that storms from the Sun are triggering auroras in X-ray light."

Chandra sees Jupiter auroras in X-rays [link]

Quoting from the explanation published with the video: "Published on Jun 30, 2016 - This composite video illustrates the auroras on Jupiter relative to their position on the giant planet.

As on Earth, auroras are produced by the interaction of a planet's magnetic field with its atmosphere. The Jupiter auroras observed by NASA's Hubble Space Telescope are some of the most active and brightest ever caught by Hubble, reaching intensities over a thousand times brighter than those seen on Earth. Hubble's sensitivity to ultraviolet light captures the glow of the auroras above Jupiter's cloud top.

The auroras were photographed on May 19, 2016, during a series of far-ultraviolet-light observations taking place as NASA's Juno spacecraft approaches and enters into orbit around Jupiter. The aim of the program is to determine how Jupiter's auroras respond to changing conditions in the solar wind, a stream of charged particles emitted from the sun.

The full-color disk of Jupiter in this video was separately photographed at a different time by Hubble's Outer Planet Atmospheres Legacy (OPAL) program, a long-term Hubble project that annually captures global maps of the outer planets.

Auroras are formed when charged particles in the space surrounding the planet are accelerated to high energies along the planet's magnetic field. When the particles hit the atmosphere near the magnetic poles, they cause it to glow like gases in a fluorescent light fixture. Jupiter's magnetosphere is 20,000 times stronger than Earth's. These observations will reveal how the solar system's largest and most powerful magnetosphere behaves."

Hubble sees Jupiter auroras in UV [link]