The world's most powerful telescope, now orbiting space, will offer new tools to address the timeless question about life in the universe: Are we alone on Earth? JWST DiscoverMagazine
years ago, no other planets were known apart from those in our solar system. But since then, more than 4,000 other planets, called the exoplanets, have been discovered orbiting other stars. NASA estimates that the true number of exoplanets could be trillions.
There could be important signs of life in the composition of the atmospheres of the exoplanets. When an exoplanet passes across the face of its star, sunlight passes through its atmosphere and could be picked up by the JWST. Spectroscopy would then be used to discover which wavelengths are missing from the light. Atoms and molecules in the atmosphere absorb certain wavelengths and therefore leave a unique fingerprint for the JWST to detect.
that if the JWST detected CFCs in exoplanet atmospheres, then that would be a tell-tale indication that a civilization is there.Of course living things on exoplanets might resemble nothing like life on Earth. Sometimes even life on Earth can seem alien, such as “. This is a class of organism, mostly microbes, that live in extremely harsh environments where life is impossible for other living creatures. Some live at very high temperatures, up to 250 Fahrenheit.
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