Exoplanets in the TRAPPIST-1 system may not have atmospheres
The planets recently discovered by NASA in the TRAPPIST-1 system, which have been hailed as second Earths by some in the media, may not be suitable for human habitation. According to researchers at the Geneva Observatory, these planets may not have atmospheric.
The TRAPPIST-1 planetary system, the most recognizable in recent months, is being studied by a number of scientific institutions. It was also looked at by scientists at the Geneva Observatory, whoóThe researchers came to some very interesting conclusionsów.
Last month, NASA announced the discovery of seven rocky Earth-sized planets in the TRAPPIST-1 system, with theórych at least three are in the ecosphere, meaning life could potentially exist on them.
The planets found by NASA are orbiting wokóTRAPPIST-1 star. TRAPPIST-1 is an ultracold red dwarf, który is located in the constellation Aquarius about 40 light years from our solar system. This star is the size of Jupiter, but is about 80 times more massive than it.
Vincent Bourrier of the Geneva Observatory, który led a team of researchers observing the ultra-cold red dwarf in the system discovered by NASA believes that the star radiates such large amounts of energy that it could completely deprive the orbiting planets of potential atmospheres. Teamół under Bourier’s direction previewed the star with the Hubble Space Telescope's ultraviolet wavelength.
The researchers found that the TRAPPIST-1 red dwarf emits less Lyman-alpha radiation than similar objectsów. This is because it is much cooler. At the same time, it radiates large amounts of high-energy X-rays. The total radiation across the spectrum is very high. Within a billionóin years it could have destroyed the atmospheres of planets in the system. Also those located in the ecosphere.