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Three planets with sizes and temperatures akin to those of the Earth and Venus are circling a dwarf star 40 light-years away. The star in question, named TRAPPIST-1 after the telescope used to observe it, is weaker and cooler than the Sun at the heart of our solar system. "With such short orbital
(via For plants on alien worlds, it isn't easy being green - space - 11 April 2007 - New Scientist)
The Photosynthetic Colors of Plants that live on various Habitable Planets and Habitable Moons in different Solar_Systems throughout The Universe.