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Alien life: Earth’s algae and moss might survive underneath the sunshine of one other star

Experiments on Earth mimicking the rays from a purple dwarf star present that cyanobacteria, algae and moss can develop underneath these mild circumstances, backing the concept some exoplanets might host life


21 September 2022

Artist's impression of three planets orbiting an ultracool dwarf star

Moss and algae can survive underneath the dim mild that might come from purple dwarf stars like TRAPPIST-1

ESO/M. Kornmesser/N. Risinger (

Algae, moss and micro organism can all survive and develop within the mild produced by a purple dwarf star, in line with experiments on Earth. This boosts the concept that planets round purple dwarf stars like TRAPPIST-1 might host life.

Essentially the most promising exoplanets for all times orbit stars which are smaller and cooler than our solar, so that they radiate completely different profiles of sunshine. As an illustration, a star like TRAPPIST-1 would give out extra …



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