PIA00371: Jupiter - Io In Front of Jupiter's Turbulent Clouds

Jupiter - Io In Front of Jupiter’s Turbulent Clouds


This photograph of the southern hemisphere of Jupiter was obtained by Voyager 2 on June 25, 1979, at a distance of 12 million kilometers (8 million miles). The Voyager spacecraft is rapidly nearing the giant planet, with closest approach to occur at 4:23 pm PDT on July 9. Seen in front of the turbulent clouds of the planet is Io, the innermost of the large Galilean satellites of Jupiter. Io is the size of our moon. Voyager discovered in early March that Io is the most volcanically active planetary body known in the solar system, with continuous eruptions much larger than any that take place on the Earth. The red, orange, and yellow colors of Io are thought to be deposits of sulfur and sulfur compounds produced in these eruptions. The smallest features in either Jupiter or Io that can be distinguished in this picture are about 200 kilometers (125 miles) across; this resolution, it is not yet possible to identify individual volcanic eruptions. Monitoring of the erupture activity of Io by Voyager 2 will begin about July 5 and will extend past the encounter July 9.

Background Info:

The Voyager project is managed for NASA by the Jet Propulsion Laboratory.

Cataloging Keywords:

Name Value Additional Values
Target Jupiter Earth, Io
System Jupiter Earth
Target Type Planet Earth, Satellite
Mission Voyager
Instrument Host Voyager 2
Host Type Flyby Spacecraft
Instrument Imaging Science Subsystem (ISS)
Extra Keywords Color, Volcano
Acquisition Date
Release Date 1996-11-13
Date in Caption 1979-06-25
Image Credit NASA/JPL
Source photojournal.jpl.nasa.gov/catalog/PIA00371
Identifier PIA00371