The creator explains the groundbreaking discovery of LHS 1140b, the first rocky planet in a habitable zone with a confirmed atmosphere. She details its characteristics, explains why its proximity to a dim star is significant, and addresses the two main challenges for life (tidal locking and radiation), before revealing how this planet overcomes them due to its mass, and concludes with a call to follow for updates from the James Webb telescope.
Post caption
New alien host planet just dropped.
Nearly 50 light years away is a planet orbiting a red dwarf star that appears to be leaking helium. This is a huge deal. Most of the time when searching for life on other planets we look for rocky planets in what’s called the “habitable zone.” This is the zone of a solar system where planets are just the right distance from the star for liquid water to exist. So far, most planets that we’ve found in these zones have a few problems, but this one… seems to defy that. For more, follow along!
science.org/doi/10.1126/science.aea9708
#science #astronomy #exoplanets #aliens
Transcript
This is the first and only time astronomers have detected an atmosphere on an Earth like planet in the habitable zone. It's 40 nine light years away, and it's leaking helium, and there could be liquid water on the surface. This is a huge deal because this star is much dimmer and smaller than our sun, which means the habitable zone is right up next to it. So a year on this planet is only twenty five days for us. But being that close, you've got two big issues. One, planets that close are tidally locked, like our moon, meaning one side is always in darkness and the other is always facing the star. This planet is tidally locked, meaning the surface might look like a weird eyeball, super icy with an ocean at the center. The second problem is radiation because typically, the atmospheres of planets this close get ripped away by radiation from their tier. And without that, life as we know it can't worst, but not here. The detection of helium means that this planet has an atmosphere, even though the upper part is slowly evaporating into space. But this planet is over five times more massive than Earth, so scientists think that it could be holding on to a thicker atmosphere closer to the surface. And the James Webb Space Telescope is learning more, so to see it, follow