NASA Messenger - views of Earth

Tips for creating and manipulating planet textures for Celestia.
Topic author
LoneHiker
Posts: 53
Joined: 10.10.2005
With us: 19 years 1 month

NASA Messenger - views of Earth

Post #1by LoneHiker » 10.10.2005, 09:36

Hi all,

For those interested in Earth textures have a look at the Messenger spacecraft site here:

http://messenger.jhuapl.edu/

During its recent flyby Messenger took a series of photos that were later composited into an animation and a couple of stills.

It's very rare to get color imagery of Earth outside of low orbit. While only an approximation of true color, and perhaps suffering some exposure difficulties, it's still very interesting data.

The very low albedo of the oceans is quite apparent, as is the warm-gray specular reflection of the sun off the water surfaces. This clearly demonstrates the default specular reflection color in Celestia imparts a much too blue appearance. The same physical process (Rayleigh scattering) that gives the sky its blue color is also responsible for scattering out short wavelength (violet/blue) light passing through the atmosphere, which is why the specular reflection appears this color.

When Messenger finally reaches its destination around Mercury it should provide plenty of new material for texture artists. So all you Mercury fans check back later. ;)

Lone

bdm
Posts: 461
Joined: 22.07.2005
With us: 19 years 4 months
Location: Australia

Re: NASA Messenger - views of Earth

Post #2by bdm » 10.10.2005, 11:33

LoneHiker wrote:When Messenger finally reaches its destination around Mercury it should provide plenty of new material for texture artists. So all you Mercury fans check back later. ;)

Lone

How good of the space agencies to spend all that money just to get us some Celesta textures. Saves us from spending the money. :)

Topic author
LoneHiker
Posts: 53
Joined: 10.10.2005
With us: 19 years 1 month

Re: NASA Messenger - views of Earth

Post #3by LoneHiker » 10.10.2005, 22:41

bdm wrote:
LoneHiker wrote:When Messenger finally reaches its destination around Mercury it should provide plenty of new material for texture artists. So all you Mercury fans check back later. ;)

Lone
How good of the space agencies to spend all that money just to get us some Celesta textures. Saves us from spending the money. :)


Yes, think of the airfare. What with the price of fuel and all. ;)

Lone


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