Plants on alien worlds may not be green


	Plants on alien worlds may not be green

dorine

4-11-2007 10:19 AM

1365 views

tags:

science, space, alien world

dorine says:

Real good article.

4 Comments |

Add a Comment

4-18-2007 12:24 AM

Deepti

interesting stuff....

4-19-2007 2:13 AM

fattyacid_1004

It's cool.

5-3-2007 1:48 AM

raverbelle

very cool indeed!!!

5-27-2007 6:23 AM

RobinLKM

This information is nice. I also saw an article about the possible composition of extraterrestial life.

-Kim-Miau Lee
www.AstronomyNotes.net

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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/f7e759b6-3186-4d23-8e6a-52c6fc9ab70d/30E06649-B158-46DA-9CC3-F48742B437C3/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://space.newscientist.com/article/dn11578-for-plants-on-alien-worlds-it-isnt-easy-being-green.html" href="http://space.newscientist.com/article/dn11578-for-plants-on-alien-worlds-it-isnt-easy-being-green.html" style="font-size: 11px;">space.newscientist.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://space.newscientist.com/article/dn11578-for-plants-on-alien-worlds-it-isnt-easy-being-green.html"><div align="center"><img src="http://content7.clipmarks.com/blog_cache/space.newscientist.com/img/E16468E2-C43C-4B32-B8EB-E82B2A166794" alt="Plants on Earth-like planets orbiting stars somewhat brighter than the Sun might look yellow or orange (Illustration: Doug Cummings/Caltech)" /></div></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://space.newscientist.com/article/dn11578-for-plants-on-alien-worlds-it-isnt-easy-being-green.html"><P>The greenery on other planets may not be green. Astrobiologists say plants on Earth-sized planets orbiting stars somewhat brighter than the Sun may look yellow or orange, while those on planets orbiting stars much fainter than the Sun might look black. </P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://space.newscientist.com/article/dn11578-for-plants-on-alien-worlds-it-isnt-easy-being-green.html"><P>Vegetation colour matters to astrobiologists because they want to know what to look for as a sign of life on planets outside the solar system. Terrestrial photosynthesis depends mostly on red light, the most abundant wavelength reaching the Earth's surface, and blue light, the most energetic. Plants also absorb green light, but not as strongly, so leaves look green to the eye.</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://space.newscientist.com/article/dn11578-for-plants-on-alien-worlds-it-isnt-easy-being-green.html"><P>Extraterrestrial plants will look different because they have evolved their own pigments based on the colours of light reaching their surfaces, says Nancy Kiang of the NASA Goddard Institute for Space Sciences in New York, US.</P></blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/30E06649-B158-46DA-9CC3-F48742B437C3/blog/" title="blog or email this clip"><img src="http://content8.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>

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