Welcome to Astronomy & Telescope Astronomy



· Home
· AvantGo
· Content
· Downloads
· Encyclopedia
· Feedback
· Forums
· Journal
· Members List
· Private Messages
· Recommend Us
· Reviews
· Search
· Statistics
· Stories Archive
· Submit News
· Surveys
· Top 10
· Topics
· Web Links
· Your Account

  Who's Online

There are currently, 12 guest(s) and 0 member(s) that are online.

You are Anonymous user. You can register for free by clicking here




Select Interface Language:


  Random Headlines

[ Observing ]

·Astronomy: Observing - Specialist-THE OBSERVING SPECIALIST
·Astronomy: Observing - Object-DECIDING WHAT TO OBSERVE
·Astronomy: Observing - TYPES OF OBSERVING

  Voyager: Astronomy: Voyager - GALILEO
Posted on Saturday, December 11 @ 01:41:54 CST by astronomy


Intrigued by the Voyager findings at Jupiter, planetary scientists once again turned their attention toward that planet in the early 1980s. They designed a mission to orbit Jupiter and monitor the planet and its satellites for at least two years. In addition, a probe was to be deployed from the spacecraft into Jupiter's atmosphere.

The launch was scheduled for May 1986 from a space shuttle, but the Challenger disaster in January of that year put all shuttle missions on indefinite hold. By the time shuttles were flying again, nearly two years later, the launch window that had afforded a direct path to Jupiter had come and gone.

Galileo did not have enough power for a direct flight, so a three-year flight path was designed to "sling" Galileo to Jupiter using gravity assists from Venus and Earth. The flight path also brought it near asteroids Gaspra in 1991 and Ida in 1993. High-resolution images of Gaspra indicated that it was possibly a fragment of a larger body, while those of Ida revealed that it was orbited by a small moon.

The spacecraft finally made it to Jupiter in December 1995. On 7 December 1995, the probe parachuted into the upper cloud decks and returned 57 minutes of data before the signal was lost. Scientists were surprised to discover that, rather than being rich in water, oxygen, carbon, and other materials, Jupiter's mostly hydrogen atmosphere was rather primitive and unprocessed, resembling that of the Sun. Moreover, its atmosphere was dry, even clear in places, with no trace of water vapor or ice. The atmosphere was also denser and windier than expected. It is possible that the probe entered an area that was much drier than the rest of the atmosphere, so its findings are not conclusive.

Meanwhile, the orbiter has returned tantalizing data on the Galilean satellites (so called because they were first seen from Earth by Galileo), discovering, among other things, that Europa may have a relatively thin icy crust covering a mantle of liquid water or slush. This concoction may contain chemicals that could nurture life.




Don't have an account yet? You can create one. As a registered user you have some advantages like theme manager, comments configuration and post comments with your name.

  Related Links

· More about Voyager
· News by astronomy

Most read story about Voyager:
Astronomy: Voyager - GALILEO


  Article Rating

Average Score: 0
Votes: 0

Please take a second and vote for this article:

Very Good



 Printer Friendly Printer Friendly

 Send to a Friend Send to a Friend


Associated Topics


"Login" | Login/Create an Account | 0 comments
The comments are owned by the poster. We aren't responsible for their content.

No Comments Allowed for Anonymous, please register

  Astronomy & Telescope Astronomy

All logos and trademarks in this site are property of their respective owner. The comments are property of their posters, all the rest © 2004 by Astronomy & Telescope Astronomy
You can syndicate our news using the file backend.php or ultramode.txt