PIA21443: Hubble Sees Recurring Plume Erupting From Europa


Hubble Sees Recurring Plume Erupting From Europa

Caption:

These composite images show a suspected plume of material erupting two years apart from the same location on Jupiter's icy moon Europa. The images bolster evidence that the plumes are a real phenomenon, flaring up intermittently in the same region on the satellite. Both plumes, photographed in ultraviolet light by NASA's Hubble's Space Telescope Imaging Spectrograph, were seen in silhouette as the moon passed in front of Jupiter.

The newly imaged plume, shown at right, rises about 62 miles (100 kilometers) above Europa's frozen surface. The image was taken Feb. 22, 2016. The plume in the image at left, observed by Hubble on March 17, 2014, originates from the same location. It is estimated to be about 30 miles (50 kilometers) high. The snapshot of Europa, superimposed on the Hubble image, was assembled from data from NASA's Galileo mission to Jupiter.

The plumes correspond to the location of an unusually warm spot on the moon's icy crust, seen in the late 1990s by the Galileo spacecraft (see PIA21444 ). Researchers speculate that this might be circumstantial evidence for water venting from the moon's subsurface. The material could be associated with the global ocean that is believed to be present beneath the frozen crust.

Cataloging Keywords:

Name Value Additional Values
Target Europa Jupiter
System Jupiter
Target Type Satellite Planet
Mission Galileo Hubble Space Telescope (HST)
Instrument Host Galileo Orbiter Hubble Space Telescope (HST)
Host Type Orbiter Orbiting Telescope
Instrument
Detector
Extra Keywords Color, Plume, Ultraviolet, Water
Acquisition Date
Release Date 2017-04-13
Date in Caption 2014-03-17 2016-02-22
Image Credit NASA/ESA/W. Sparks (STScI)/USGS Astrogeology Science Center
Source photojournal.jpl.nasa.gov/catalog/PIA21443
Identifier PIA21443