Welcome to Astronomy & Telescope Astronomy

 
 

  Modules

· Home
· AvantGo
· Content
· Downloads
· Encyclopedia
· FAQ
· 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, 13 guest(s) and 0 member(s) that are online.

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

  Search



 

  Languages

Select Interface Language:

 

  Random Headlines


Star
[ Star ]

·Astronomy: Star - STAR COLORS
·Astronomy: Star - STAR BRIGHT
·Astronomy: Star - OBSERVING STARS
·Astronomy: Star - STAR MOTIONS
·Astronomy: Star - DISTANCES
·Astronomy: Star - ANNIE JUMP CANNON
·Astronomy: Star
 

 
  Venus: Astronomy: Venus - REPAVE THE PLANET
Posted on Saturday, December 11 @ 01:35:39 CST by astronomy
 
 
  Venus

REPAVE THE PLANET

About 600 million years ago, something reset the goo-clock on Venus's surface, and nobody knows why or how. Impact craters are by far the most common landform in the Solar System, but Venus has less than a thousand of them.

Given the rate at which new impacts occur, this means that the planet lias somehow erased all traces of the first 85 percent ot its history. There are various theories to explain this.

Venus may have a thin, soft crust that cannot preserve ancient terrain. Or episodes of plate tectonics might have erased old features, but these periods alternate with times (like now) when it is quiescent. Or maybe Venus has spasms of volcanism. Or perhaps we are seeing Venus soon after its geo-engine shut down. Or some combination of the above. The fact is, scientists do not yet know.

Some scientists think that Venus is still volcanically active. The amount ofsulfur dioxide—a common volcanic gas—in the atmosphere has changed over the last 15 years, perhaps indicating a recent eruption followed by a settling-out of the gas. Also, the tallest mountains are too high to be held up by Venus's crust alone, so either they are recently built or they are supported by hot rock still rising from below.

 
 
  Login

Nickname

Password

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 Venus
· News by astronomy


Most read story about Venus:
Astronomy: Venus - GREENHOUSE EFFECT

 

  Article Rating

Average Score: 0
Votes: 0

Please take a second and vote for this article:

Excellent
Very Good
Good
Regular
Bad

 

  Options


 Printer Friendly Printer Friendly

 Send to a Friend Send to a Friend

 

 
 
Associated Topics

Venus
 
 


 
 
"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