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M dwarf stars dominate ordsprog

M dwarf stars dominate the stellar population in the solar neighborhood, and so are attractive targets for searching for habitable planets. The models show that gas-giant planets are indeed likely to form?at distances sufficiently large enough to permit the later formation of habitable, terrestrial planets.

The results pose a challenge to existing theories of giant-planet formation, especially those in which planets build up gradually over millions of years. Studies like this one will ultimately help us better understand how our outer planets, as well as others in the universe, form.

This discovery is particularly exciting because the habitable zone for these stars - the region where a planet would be the right temperature for liquid water - is close to the star. Planets that are close to their stars are easier to find. The first truly Earth-like planet we discover might be a world orbiting a red dwarf.

Dimitar Sasselov

Stars we're looking at here are prior to the formation of planets, we think, but it's not going to be very much longer in astronomical terms before planets start forming.

It provides for us a window 41/2 billion years back in time to observe the formation conditions of giant planets. This is a little bit about rewriting the textbooks about the outer planets.

These are the types of stars around which you would expect to find habitable zones and planets that could develop life.

These are the oldest debris disks seen in reflected light, and are important because they show what the Kuiper Belt might look like from the outside. These are the types of stars around which you would expect to find habitable zones and planets that could develop life.

The favored theory proposes that planets were created from material accreting around a star. Around red dwarfs, the theory predicts Earth- and Neptune-sized planets to be more common than Jupiter-sized planets. The planets would be located between 0.1 and 10 times the Earth-Sun distance from their stars.

Bohdan Paczynski

It used to be that Pluto was a misfit. Now it turns out that Earth is the misfit. Most planets in the solar system look like Pluto, and not like the terrestrial planets.

Asteroids are the leftover building blocks of rocky planets like Earth. We can't directly see other terrestrial planets, but now we can study their dusty fossils.

Charles Beichman

It's different from the inner rocky planets. It's different from the outer gaseous planets. And as such, it holds many clues as to how the solar system was formed.

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The good thing about this is it shows that planets this size might be quite common in habitable zones.

This discovery implies that brown dwarf companions to average, sunlike stars exist at a separation comparable to the distance between the sun and the outer planets in our solar system.

Whether planets around these stars could be Earth-like would depend on orbital distance. There have been extensive studies and it turns out these planets would have to be pretty close to their stars, although it would depend on the mass of the stars.

Now we can say that planets around pulsars are probably not that unusual. Maybe planets can form around any kind of star.

Aleksander Wolszczan

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Denna sidan visar ordspråk som liknar "M dwarf stars dominate the stellar population in the solar neighborhood, and so are attractive targets for searching for habitable planets. The models show that gas-giant planets are indeed likely to form?at distances sufficiently large enough to permit the later formation of habitable, terrestrial planets.".