Free Republic
Browse · Search
General/Chat
Topics · Post Article

Skip to comments.

Astronomy Picture of the Day -- A Dangerous Sunrise on Gliese 876d
NASA ^ | April 29, 2012 | (see photo credit)

Posted on 04/29/2012 4:55:30 AM PDT by SunkenCiv

Explanation: On planet Gliese 876d, sunrises might be dangerous. Although nobody really knows what conditions are like on this close-in planet orbiting variable red dwarf star Gliese 876, the above artistic illustration gives one impression. With an orbit well inside Mercury and a mass several times that of Earth, Gliese 876d might rotate so slowly that dramatic differences exist between night and day. Gliese 876d is imagined above showing significant volcanism, possibly caused by gravitational tides flexing and internally heating the planet, and possibly more volatile during the day. The rising red dwarf star shows expected stellar magnetic activity which includes dramatic and violent prominences. In the sky above, a hypothetical moon has its thin atmosphere blown away by the red dwarf's stellar wind. Gliese 876d excites the imagination partly because it is one of the few extrasolar planets known to be in or near to the habitable zone of its parent star.

April 29, 2012

(Excerpt) Read more at 129.164.179.22 ...


TOPICS: Astronomy; Astronomy Picture of the Day; Science
KEYWORDS: apod; astronomy; gliese876d; science; xplanets
Navigation: use the links below to view more comments.
first previous 1-2021-32 last
To: cripplecreek

I just looked at your photobucket. Very cool.


21 posted on 04/29/2012 8:50:25 AM PDT by samtheman ( http://www.youtube.com/watch?v=CZ-4gnNz0vc)
[ Post Reply | Private Reply | To 20 | View Replies]

To: SunkenCiv

That planet is in or near the habitable zone of its star? Maybe they just don’t go above ground during the day...


22 posted on 04/29/2012 10:30:05 AM PDT by TheOldLady (FReepmail me to get ON or OFF the ZOT LIGHTNING ping list)
[ Post Reply | Private Reply | To 3 | View Replies]

To: cripplecreek

I also have Photoshop CS3 and would love some pointers.


23 posted on 04/29/2012 11:53:31 AM PDT by Army Air Corps (Four Fried Chickens and a Coke)
[ Post Reply | Private Reply | To 20 | View Replies]

To: KevinDavis

Ping.


24 posted on 04/29/2012 11:54:47 AM PDT by Army Air Corps (Four Fried Chickens and a Coke)
[ Post Reply | Private Reply | To 3 | View Replies]

To: Army Air Corps
I learn a lot from tutorials.

30+ Photoshop Tutorials for Creating Space and Planets

photoshop Mosaic

Planets are actually pretty easy, the toughest thing I've found to do is to create a halfway realistic starfield. Once I have one I never let it go. Here's a real basic starfield I made if you want to keep it and use it to build on.

starfield
25 posted on 04/29/2012 12:10:40 PM PDT by cripplecreek (What does it profit a man if he gains the whole world but loses his soul?)
[ Post Reply | Private Reply | To 23 | View Replies]

To: cripplecreek

Thanks! I do the same thing when I create an effect layer - I store it an reuse or tweak it.


26 posted on 04/29/2012 12:16:26 PM PDT by Army Air Corps (Four Fried Chickens and a Coke)
[ Post Reply | Private Reply | To 25 | View Replies]

To: SunkenCiv

27 posted on 04/29/2012 12:18:31 PM PDT by BIGLOOK
[ Post Reply | Private Reply | To 1 | View Replies]

To: SunkenCiv

That’s a proctoscope photo of my digestive tract after consuming Habaneros.


28 posted on 04/29/2012 12:43:43 PM PDT by Rebelbase
[ Post Reply | Private Reply | To 1 | View Replies]

To: Rebelbase

Did Doctor Rawls perform the procedure?

http://www.youtube.com/watch?v=QI1go72c5H8


29 posted on 04/29/2012 2:49:27 PM PDT by greenhornet68
[ Post Reply | Private Reply | To 28 | View Replies]

To: shibumi; PGalt; moose07; cripplecreek; Erasmus; Army Air Corps

Thanks!


30 posted on 04/29/2012 4:21:52 PM PDT by SunkenCiv (FReepathon 2Q time -- https://secure.freerepublic.com/donate/)
[ Post Reply | Private Reply | To 4 | View Replies]

To: samtheman; blueunicorn6; greenhornet68; 2nd Bn, 11th Mar; ml/nj; Erasmus; Ernest_at_the_Beach; ...

LOL


31 posted on 04/29/2012 4:21:52 PM PDT by SunkenCiv (FReepathon 2Q time -- https://secure.freerepublic.com/donate/)
[ Post Reply | Private Reply | To 5 | View Replies]

To: BIGLOOK

Whoops, thanks BIGLOOK.


32 posted on 04/29/2012 4:23:28 PM PDT by SunkenCiv (FReepathon 2Q time -- https://secure.freerepublic.com/donate/)
[ Post Reply | Private Reply | To 27 | View Replies]


Navigation: use the links below to view more comments.
first previous 1-2021-32 last

Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.

Free Republic
Browse · Search
General/Chat
Topics · Post Article

FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson