text: Plants on other planets may not be green
  
  April 12, 2007 
  
  On Wednesday, NASA scientists said that, unlike green plants on the planet Earth, plants on other planets may be the color red or yellow. 
  Plants on Earth are green because they contain chlorophyll. The chlorophyll appears green because it absorbs mainly blue and red light in order to produce food for the plant via photosynthesis, while reflecting the green light frequency. 
  Scientists at NASA point out that if the stars for other planets were in a different state than our sun and if the light frequency that reached the planets' surface was different, then the plants on those planets would have also evolved a different type of photosynthetic pigment other than chlorophyll. This pigment would be dedicated towards the different light frequencies received by the planet causing the plant to appear a different color from green such as red and yellow.
tokens: Plants on other planets may not be green April 12 , 2007 On Wednesday , NASA scientists said that , unlike green plants on the planet Earth , plants on other planets may be the color red or yellow . Plants on Earth are green because they contain chlorophyll . The chlorophyll appears green because it absorbs mainly blue and red light in order to produce food for the plant via photosynthesis , while reflecting the green light frequency . Scientists at NASA point out that if the stars for other planets were in a different state than our sun and if the light frequency that reached the planets ' surface was different , then the plants on those planets would have also evolved a different type of photosynthetic pigment other than chlorophyll . This pigment would be dedicated towards the different light frequencies received by the planet causing the plant to appear a different color from green such as red and yellow .
nps.text: Plants
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nps.text: other planets
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nps.text: Wednesday
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nps.text: NASA scientists
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nps.text: green plants
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nps.text: the planet Earth
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nps.text: plants
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nps.text: other planets
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nps.text: Plants
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nps.text: Earth
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nps.text: they
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nps.text: chlorophyll
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nps.text: The chlorophyll
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nps.text: mainly blue and red light
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nps.text: order
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nps.text: food
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nps.text: the plant
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nps.text: photosynthesis
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nps.text: the green light frequency
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nps.text: Scientists
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nps.text: NASA
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nps.text: the stars
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nps.text: other planets
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nps.text: a different state
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nps.text: our sun
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nps.text: the light frequency
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nps.text: the planets' surface
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nps.text: the plants
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nps.text: those planets
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nps.text: a different type
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nps.text: photosynthetic pigment
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nps.text: chlorophyll
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nps.text: This pigment
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nps.text: the different light frequencies
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nps.text: the planet
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nps.text: the plant
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nps.text: a different color
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