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Helium- shrouded planets may be common in our galaxy
Planets having atmospheres rich in helium may be common in our Milky Way galaxy, according to a new theory based on data from NASA\'s Spitzer Space Telescope. \"We don\'t have any planets like this in our own solar system, but we think planets with helium atmospheres could be common around other stars,\" NASA Hubble Fellow and lead author of a new study, Renyu Hu, said on Thursday.
Los Angeles: Planets having atmospheres rich in helium may be common in our Milky Way galaxy, according to a new theory based on data from NASA's Spitzer Space Telescope. "We don't have any planets like this in our own solar system, but we think planets with helium atmospheres could be common around other stars," NASA Hubble Fellow and lead author of a new study, Renyu Hu, said on Thursday.
Using data from NASA's Spitzer Space Telescope, researchers have found hundreds of planets, which are the size of Neptune or smaller, with tight orbits that are closer to their stars than our own sizzling Mercury to our sun. Radiation from the stars would boil off hydrogen in the planets' atmospheres, scientists say in the new study.
Both hydrogen and helium are common ingredients of gas planets like these. Hydrogen is lighter than helium and thus more likely to escape. According to NASA, the next step to test this theory is to look at other warm Neptunes for signs of carbon monoxide and carbon dioxide, which are indicators of helium atmospheres.
