The Earth-size exoplanet GJ 1132 b has no atmosphere.

The Earth-size exoplanet GJ 1132 b has no atmosphere.

"Artist’s impression of exoplanet GJ 1132 b and its host M-dwarf star. Credit: Dana Berry, Skyworks Digital, CfA"

"JWST confirms GJ 1132 b lacks an atmosphere. This challenges the habitability of planets around M-dwarfs."

(ScitechDaily, JWST Solves the Mystery: Earth-Like Planet GJ 1132 B Has No Atmosphere)

The Earth-size exoplanet GJ 1132 b has no atmosphere. And that causes some kind of re-estimation of the habitability of the M-type stars. Those M-type stars have violent eruptions that can raise the temperatures of their entire solar systems. Those solar systems are always quite small, and if the planet is in the habitable zone, that means it's locked because of tidal forces. 

The GJ 1132 b is almost a so-called hot Earth. That means there might not be a lifeform. But another question is, can we escalate those observations to other red dwarfs? Red dwarfs, or M-spectral class stars, are not all similar. Some of them are more active than others. 

If the planet is very young, that can explain the lack of atmosphere. The volcanic activity can explain the smoke or fog around the exoplanet GJ 1132 b. Or that slightly larger than Earth exoplanet can pull solar wind from its star, GJ 1132, an M4-type red dwarf, around it. This means the planet’s gravity pulls the gas that the red dwarf sends around it. And if the GJ 1132 b has a magnetosphere that pulls plasma around it. This means G J1132 b borrows its atmosphere from the star GJ 1132. 

The M-6 spectral Class star Proxima Centauri is under the influence of Alpha Centauri, and that means Alpha Centauri A and B’s star wind can affect Proxima Centauri and blow its atmosphere away. Or the gravitational effect of the bigger parts of this triple star system’s larger participants. Can pull the Proxima Centauri atmosphere off. The reaction can go like this. 

"Artist’s impression of GJ 1132 b – which now should be updated given its definitive lack of atmosphere. Credit: NASA/JPL-Caltech/Robert Hurt" (ScitechDaily, JWST Solves the Mystery: Earth-Like Planet GJ 1132 B Has No Atmosphere)

"Comparison of best-fit size of the exoplanet GJ 1132 b with the Solar System planet Earth, as reported in the Open Exoplanet Catalogue of 2015-11-14.  Open Exoplanet Catalogue (2015-11-14). Retrieved on 2015-11-14." (Wikipedia, GJ 1132 b)

Radiation from a binary star made the red dwarf shine brighter. That made M-star blow its atmosphere larger. Then the gravity and solar wind blew that material away. Some M-stars are more active than others. There are many variables that determine if a planet can have an atmosphere. If the red dwarf is very young, that means it's more active than older red dwarfs. Another thing is this. Planet formation is similar around red dwarfs as it was in our solar system. The planet that forms around M-type stars must have time to freeze.

The difference between M-stars and spectral class G-stars is that red dwarfs formed from a more mature nebula than G-stars. Those interplanetary nebulae formed when stars exploded as novae and supernovae. That means there are more heavy elements in the red dwarf system than in the G-type star systems. That means, there could also be more radioactive isotopes in those planets than in G-type stars’ planets. This could cause an effect. That some of those rocky planets are hotter than they should be. But that is hard to prove. 

The red dwarf could also form in a binary star system when the star’s heliospheres touch each other. That can cause the small star forms in that whirl. There is also a possibility that a red dwarf travels around space, and some bigger star traps it into its gravity field. The red dwarf can also steal planets from bigger stars' solar systems. If they travel close to the distant planets of the larger stars, those red dwarfs can take those planets to orbit around themselves. 

They can also trap rogue planets in their gravity field. There is a possibility that the Proxima Centauri planets originally orbited Alpha Centauri. Then Proxima trapped them in orbit around itself. 

https://scitechdaily.com/jwst-solves-the-mystery-earth-like-planet-gj-1132-b-has-no-atmosphere/

https://en.wikipedia.org/wiki/GJ_1132_b

https://en.wikipedia.org/wiki/GJ_1132

https://en.wikipedia.org/wiki/Proxima_Centauri

Can a binary star's planet host lifeforms?

"A strange new planet has been found circling two stars at a right angle — like something out of sci-fi. It’s the first solid evidence of a so-called polar orbit around a binary system. Credit: SciTechDaily.com" (ScitechDaily, Planet Found Orbiting Two Stars at a Perfect 90-Degree Angle)

The polar planet that orbits the binary star at a 90-degree angle can host life. There is only one of those polar exoplanets known. That planet orbits two brown dwarfs. So it will not host lifeforms. But it tells that the polar exoplanets exist. 

There is the possibility that if the planet orbits the binary star at a perfect 90-degree angle to the star's layer. That thing makes it possible that there are lifeforms on that planet. The binary stars are quite complicated things. And if the planet's orbital angle is perfect conditions on that planet can be stable. That can offer the harbor for life. 

The planet can also lie to the binary star. That means the binary star can be like any star. The planetary systems can form around the stars. Or the star can capture rogue planets around it. There is the model that the rogue planets are the most common planet types in the universe. Those planets can form in supernova remnants or when some cosmic shockwave travels through the small molecular clouds. 

"This is an artist’s impression of the exoplanet 2M1510 (AB) b’s unusual orbit around its host stars, a pair of brown dwarfs. The newly discovered planet has a polar orbit, which is perpendicular to the plane in which the two stars are traveling. Credit: ESO/L. Calçada" (ScitechDaily, Planet Found Orbiting Two Stars at a Perfect 90-Degree Angle)

"Using ESO’s Very Large Telescope (VLT), astronomers have found an exoplanet orbiting a pair of peculiar stars at an angle of 90 degrees. There have previously been hints that these so-called polar planets around two stars could exist, but we now have clear evidence that this is the case. This special system was found by observing the orbital path of the two stars being pushed and pulled in a way that could only be explained by the presence of a planet on a polar orbit. This video summarizes the discovery, explaining the nature of these peculiar stars and the method astronomers used to find this odd planet. Credit: ESO" (ScitechDaily, Planet Found Orbiting Two Stars at a Perfect 90-Degree Angle)

In that case, the planet axle is in the same direction as the binary star, so participants can orbit each other at close distance. 

Can act as the lone star. In that case. Those planets have night and day like on Earth. The other versions are so-called open or long-distance binary- or multiple stars. There is the possibility that both of those stars have their own planetary systems. Maybe those planets have not night at all. 

The binary star systems are more common than the lone star systems. In the 1990s most researchers thought that binary stars could not have planets because their gravity effect would destroy the protoplanet. 

Today we know. Also, binary stars have planets. The fact is that almost every red dwarf that we know has exoplanet systems. So, we can expand that model to other stars. That means that almost all stars should have planetary systems. Things like Barnard star's planetary systems tell us that the smallest red dwarfs can have multiple planets around them. Barnard's star is roughly larger than Jupiter's. And it has four planets.

https://scitechdaily.com/planet-found-orbiting-two-stars-at-a-perfect-90-degree-angle/

https://scitechdaily.com/a-century-old-cosmic-mystery-solved-four-hidden-planets-found-near-earth/