Chatroom
 

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Bad Astronomy and Universe Today Forum > Space and Astronomy > Astronomy
Register FAQ Members List Calendar Mark Forums Read

Reply
 
LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old 22-May-2008, 12:39 PM
Nadme's Avatar
Nadme Nadme is offline
Senior Member
 
Join Date: Nov 2007
Location: Stars & Stripes
Posts: 740
Default Sunrise on Gliese 876d?

Mustafar is tame compared to this!

http://antwrp.gsfc.nasa.gov/apod/ap080521.html

Artist's conception of what sunrise on Gliese 876d might look like!

It is beautiful though.
Reply With Quote
  #2 (permalink)  
Old 23-May-2008, 06:18 PM
eburacum45's Avatar
eburacum45 eburacum45 is offline
Senior Member
 
Join Date: Jun 2003
Location: old york
Posts: 4,550
Default

Here is the apparent size of Gliese 876 as seen from Gl 876 d, compared with the Sun as seen from Earth, in an image made using Celestia..
http://img339.imageshack.us/img339/8...ese876dsn2.jpg
Bear in mind that Gliese 876 is actually quite a bit smaller than the Sun, but this planet is so close to it that it looks huge.

I've switched off the atmosphere display on both planets, for an easier comparison; but since Gl 876d has a mass between 5.88 and 7.5 times that of the Earth, it almost certainly has an atmosphere of some sort, probably so thick that you can't see the star.

It would also be very hot there; which the APOD image shows quite nicely. The surface of the planet may in fact be completely molten. Not the most appealing of worlds, even if you are a salamander.
Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
sunrise and sunset on planisphere rockinreel Astronomical Observing, Equipment and Accessories 1 17-November-2005 05:11 AM
How is sunrise determined? Spiro Astronomy 2 08-April-2003 05:43 PM


All times are GMT. The time now is 02:57 AM.


Powered by vBulletin® Version 3.6.8
Copyright ©2000 - 2008, Jelsoft Enterprises Ltd.
LinkBacks Enabled by vBSEO 3.0.0
©  2006 Bad Astronomy and Universe Today