Hubble Eyes Planet Thats Had Multiple Atmospheres – Nerdist

Using NASAs Hubble telescope, astronomers have observed an exoplanet that may have had two completely separate atmospheres in its lifetime. The exoplanet (that is, a planet outside our solar system), currently has an atmosphere gassed into existence from volcanoes and a roiling surface. But astronomers think some of that same atmosphere had a previous life; long before it was sucked into the planets mantle in the first place.

CNN reported on the discovery, which NASA recently announced. The astronomers say they used Hubble to observe the planet indirectly, detecting its atmospheric fingerprints thanks to the way they distort the light coming from its parent star.

The planetwhich has the ever-showy moniker, GJ 1132 borbits inside a star system 41 light-years away. And basically sounds like Mustafar from Star Wars.

Thanks to the gravitational pull from its parent star, as well as a nearby planet, GJ 1132 b is constantly subjected to tidal forces. That is, the gravitational pulls of both its parent star and the nearby planet are simultaneously tugging on GJ 1132, causing its crust to crack, its mantle to churn, and all of the subsequent volcanic activity. Which includes the outgassing of hydrogen, hydrogen cyanide, methane, and an aerosol haze.

NASA Goddard

In the planets past, however, the hydrogen from that toxic mix had another life as a blanket around GJ 1132. Using computer modeling, the astronomers think its likely GJ 1132 was once a sub-Neptune planet; that is a planet with a smaller radius than Neptune, but a larger mass. During this period of its life, it had an atmosphere of hydrogen and helium. But, thanks to the heat from its parent star, the helium blew off into space. The hydrogen, on the other hand, likely made its way into the planets magma mantle.

NASA says this is the first time astronomers have detected a secondary atmosphere on a planet outside of our solar system. Although well have to wait for the upcoming launch of the James Webb Telescope to observe GJ1132 directly. Using Webbs infrared vision, the astronomers think theyll even be able to see down to the planets surface. Which probably looks like an endless landscape of volcanoes and lava rivers. I.e. a great place to have a lightsaber duel.

NASA Goddard

Feature image: NASA, ESA, and R. Hurt (IPAC/Caltech)

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Hubble Eyes Planet Thats Had Multiple Atmospheres - Nerdist