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Newly discovered exoplanets may yield signs of life
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ANU astrophysicist and cosmologist Dr Brad Tucker says the new class of exoplanets recently found by astronomers could hold signs of life.
“It’s quite exciting because we look at our solar system and we see Earth, and we see that Mars and Venus are similar to Earth, obviously the atmospheres are different, but they’re about the same size, they’re rocky planets with atmospheres,” he told Sky News Australia.
“We then look at Jupiter and Saturn, these gas giants, and we look at Uranus and Neptune; they’re what we call these ice giants.”
Dr Tucker said there is a class of planet called mini-Neptunes, which are a midway point between Earth and Neptune and have more rocky cores but have high hydrogen content.
Dr Tucker also said some of these mini-Neptunes were at the optimal distance from their suns for liquid water to be present.
“Here, you have a planet that can be quite an abundance in the ingredients for life and in an environment that can keep life alive, essentially.
“The amazing thing about this is, about 20 per cent or so far of all the other star systems we’ve looked at, all the stars in the nighttime sky, all have these mini-Neptunes.
“This may be the type of planet we should be focussing on to study to look for life.”
“It’s quite exciting because we look at our solar system and we see Earth, and we see that Mars and Venus are similar to Earth, obviously the atmospheres are different, but they’re about the same size, they’re rocky planets with atmospheres,” he told Sky News Australia.
“We then look at Jupiter and Saturn, these gas giants, and we look at Uranus and Neptune; they’re what we call these ice giants.”
Dr Tucker said there is a class of planet called mini-Neptunes, which are a midway point between Earth and Neptune and have more rocky cores but have high hydrogen content.
Dr Tucker also said some of these mini-Neptunes were at the optimal distance from their suns for liquid water to be present.
“Here, you have a planet that can be quite an abundance in the ingredients for life and in an environment that can keep life alive, essentially.
“The amazing thing about this is, about 20 per cent or so far of all the other star systems we’ve looked at, all the stars in the nighttime sky, all have these mini-Neptunes.
“This may be the type of planet we should be focussing on to study to look for life.”
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