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, 7 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


Astrophysics
[ Astrophysics ]

·Astronomy: Astrophysics - Signal-READING THE SIGNALS
·Astronomy: Astrophysics - Question-AGE-OLD QUESTIONS
·Astronomy: Astrophysics - THE INCREDIBLE EXPANDING UNIVERSE
·Astronomy: Astrophysics - DISTANT NEIGHBORS
·Astronomy: Astrophysics - THE BIRTH OF ASTROPHYSICS
 

 
  Planet Observation: Astronomy: Pluto - A MOON FOR PLUTO
Posted on Tuesday, December 07 @ 13:14:31 CST by astronomy
 
 
  Planet Observation

A MOON FOR PLUTO

In 1978, James Christy discovered that Pluto has a moon. He named it Charon, after the mythological boat-man who ferried the souls of the dead across the River Styx to Hades. When astronomers determined Charon's orbit, they were startled to note that between 1985 and 1990, observers on Earth could see the Pluto-Charon system essentially edge-on, and watch the two bodies eclipse and occult one another every 3.2 days.



By taking measurements during these eclipses, scientists worked out that Pluto has a diameter of 1,425 miles (2,300 km), and Charon is fully half its size: 760 miles (1,220km). They are separated by 12,100 miles (19,500 km), making almost a
"double planet." Scientists also estimate the masses of Pluto and Charon together amount to less than 1/400 Earth's mass.

 
 
  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 Planet Observation
· News by astronomy


Most read story about Planet Observation:
Astronomy: Planet Observation - FINDING PLANET

 

  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

Planet Observation
 
 


 
 
"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