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View Full Version : Red Suns and Black Trees: Shedding a New Light on Alien Plants



Fraser
2011-Apr-20, 12:10 PM
  The grass may definitely not be greener on some alien worlds, suggests a new study from the UK. For example, planets in double-star systems could have grey or black vegetation. (...)Read the rest of Red Suns and Black Trees: Shedding a New Light on Alien Plants (432 words) © Jason Major for Universe Today, [...]

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Ronald Brak
2011-Apr-20, 12:35 PM
Well, there is little overall difference between the energy from different colours of visible light reaching the earth's surface, so it appears that plants are green because they use chlorophyll a and b and chlorophyll a and b is green. Here are some photosynthetic pigments and the parts of the spectrum they absorb:

http://course1.winona.edu/sberg/ILLUST/fig15-5.jpg

So why do plants on earth use generally use chlororphyll a and b when other pigments can be used? Possibly because they are the most practical.