Featured Research

from universities, journals, and other organizations

New Spacecraft Tool Reveals Massive Gas Cloud Around Jupiter

Date:
February 28, 2003
Source:
NASA/Jet Propulsion Laboratory
Summary:
Using a sensitive new imaging instrument on NASA's Cassini spacecraft, researchers have discovered a large and surprisingly dense gas cloud sharing an orbit with Jupiter's icy moon Europa.

Using a sensitive new imaging instrument on NASA's Cassini spacecraft, researchers have discovered a large and surprisingly dense gas cloud sharing an orbit with Jupiter's icy moon Europa.

Stretching millions of miles around Jupiter, the donut-shaped cloud, known as a "torus," is believed to result from the uncommonly severe bombardment of ion radiation the jovian giant sends toward Europa. That radiation damages Europa's surface, kicking up and pulling apart water-ice molecules and dispersing them along the moon's orbit into a neutral-gas torus with a mass of about 60,000 tons.

The cloud's mass indicates the intense radiation Europa faces has more severe consequences than scientists thought, said Dr. Barry Mauk of Johns Hopkins University Applied Physics Laboratory, Laurel, Md. Mauk heads the laboratory's research team whose findings appear in the Feb. 27 issue of the journal Nature. The mass also shows that Europa, in an orbit some 671,000 kilometers (416,000 miles) from Jupiter, wields considerable influence on the magnetic configuration around the giant planet.

"Surprisingly, Europa's gas cloud compares to that generated by the volcanically active satellite Io," Mauk said. "But where Io's volcanoes are constantly spewing materials, mostly sulfur and oxygen, Europa is a comparatively quiet moon, and the water gas we see is a direct consequence of its icy surface being bombarded so intensely." he said.

"By acting as both a source and a sink of charged radiation particles, the dense gas torus gives Europa much greater influence than was previously thought on the structure of, and energy flow within, Jupiter's huge space environment, its magnetosphere," Mauk said.

The Applied Physics Laboratory team studied images of Jupiter taken in late 2000 and early 2001 with the laboratory's ion and neutral camera on NASA's Cassini spacecraft, now en route to Saturn. Mauk says this is the first substantial discovery made at an extraterrestrial planet using an innovative technique known as energetic neutral atom imaging.

"Planetary magnetospheres glow with energetic neutral atoms, much like a red-hot piece of iron glows with photons of light, and such neutral-atom glows can be remotely imaged," Mauk said. "To this point, no instrument has imaged that activity beyond Earth's magnetosphere. Energetic neutral atom imaging makes visible the three-dimensional structure of planetary space environments, which, until recently, were invisible to remote imaging techniques."

Research team members at the Applied Physics Laboratory and co-authors on the Nature paper, "Energetic Neutral Atoms from a Trans-Europa Gas Torus at Jupiter," include Dr. Donald Mitchell, Dr. Stamatios Krimigis, Dr. Edmond Roelof and Dr. Christopher Paranicas. Krimigis, head of the space department at the laboratory, is principal investigator for Cassini's magnetospheric imaging instrument, which includes the ion and neutral camera.

The magnetospheric imaging instrument built by the Applied Physics Laboratory is one of 12 science instruments on the main spacecraft and one of six instruments designed to investigate the space environments around Saturn and its moons. Cassini will begin orbiting Saturn on July 1, 2004, and release its piggybacked Huygens probe about six months later for descent through the thick atmosphere of the moon Titan. Cassini-Huygens is a cooperative mission of NASA, the European Space Agency and the Italian Space Agency. NASA's Jet Propulsion Laboratory, Pasadena, Calif., manages the mission for NASA's Office of Space Science, Washington, D.C. JPL is a division of the California Institute of Technology in Pasadena.

An energetic neutral atom image showing the donut-shaped cloud around Jupiter is available at http://photojournal.jpl.nasa.gov/catalog/PIA04432 and at http://www.jhuapl.edu/newscenter/pressreleases/2003/030227.htm .

For more information on Cassini visit http://saturn.jpl.nasa.gov .

For more information on the magnetospheric imaging instrument and its science mission visit http://sd-www.jhuapl.edu/CASSINI .


Story Source:

The above story is based on materials provided by NASA/Jet Propulsion Laboratory. Note: Materials may be edited for content and length.


Cite This Page:

NASA/Jet Propulsion Laboratory. "New Spacecraft Tool Reveals Massive Gas Cloud Around Jupiter." ScienceDaily. ScienceDaily, 28 February 2003. <www.sciencedaily.com/releases/2003/02/030228072013.htm>.
NASA/Jet Propulsion Laboratory. (2003, February 28). New Spacecraft Tool Reveals Massive Gas Cloud Around Jupiter. ScienceDaily. Retrieved September 19, 2014 from www.sciencedaily.com/releases/2003/02/030228072013.htm
NASA/Jet Propulsion Laboratory. "New Spacecraft Tool Reveals Massive Gas Cloud Around Jupiter." ScienceDaily. www.sciencedaily.com/releases/2003/02/030228072013.htm (accessed September 19, 2014).

Share This



More Space & Time News

Friday, September 19, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Boeing, SpaceX to Send Astronauts to Space Station

Boeing, SpaceX to Send Astronauts to Space Station

AFP (Sep. 17, 2014) — NASA selected Boeing and SpaceX on Tuesday to build America's next spacecraft to carry astronauts to the International Space Station (ISS) by 2017, opening the way to a new chapter in human spaceflight. Duration: 01:13 Video provided by AFP
Powered by NewsLook.com
East Coast Treated To Rare Meteor Sighting

East Coast Treated To Rare Meteor Sighting

Newsy (Sep. 16, 2014) — Numerous residents along the East Coast reported seeing a bright meteor flash through the sky Sunday night. Video provided by Newsy
Powered by NewsLook.com
Space Race Pits Bezos Vs Musk

Space Race Pits Bezos Vs Musk

Reuters - Business Video Online (Sep. 16, 2014) — Amazon CEO Jeff Bezos' startup will team up with Boeing and Lockheed to develop rocket engines as Elon Musk races to have his rockets certified. Fred Katayama reports. Video provided by Reuters
Powered by NewsLook.com
NASA Picks Boeing and SpaceX to Ferry Astronauts

NASA Picks Boeing and SpaceX to Ferry Astronauts

AP (Sep. 16, 2014) — NASA is a giant step closer to launching Americans again from U.S. soil. It has announced it has picked Boeing and SpaceX to transport astronauts to the International Space Station in the next few years. (Sept. 16) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins