This discovery is particularly gezegde

 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.

 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.

 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.

 Venus has become somewhat of a 'forgotten planet' with the emphasis on Mars exploration in the U.S.. But Venus can tell us about Earth's future and about planets around other stars -- I expect we will discover a number of surprises from this most capable new mission.

 Besides being extremely close to Earth, this object is a T dwarf - a very cool brown dwarf - and the only such object found as a companion to a low-mass star. It is also likely the brightest known object of its temperature because it is so close.

 The separation between star and planet has not changed from 1999 to 2004, which means that they move together on the sky. In our case, we do have a normal plain image showing the bright star and the faint planet a little bit west of the star. The planet is only 156 times fainter than the star, because the planet is still very young and hence still forming, still contracting.

 The team has discovered the most Earth-like planet yet, and more importantly, has demonstrated the power of a new technique that is sensitive to detecting habitable planets.

 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.

 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.

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

 Next to reasoning, the greatest handicap to the optimum development of Man lies in the fact that this planet is just barely habitable. Its minimum temperatures are too low, and its maximum temperatures too high. Its day is not long enough, and its night is too long. The disposition of its water and earth is distinctly unfortunate (the existence of the Mediterranean Sea in the place where we find it is perhaps the unhappiest accident in the whole firmament). These factors encourage depression, fear, war, and lack of vitality. They describe a planet, which is by no means perfectly devised for the nurturing or for the perpetuation of a higher intelligence.
  James Thurber

 It used to take seven Earth days to model one Jupiter day, MIRACLE should allow us to run models in 'real time,' ... It will also let us model the giant planets that have been discovered orbiting nearby stars, which leads us into whole new areas of research.

 We expected that there might be Earth-mass planets here because the planet we know about is weird. It's too big for its mass and one of the best theories to explain that was that it was being puffed out by the tidal influence of a Earth-mass planet in a nearby orbit. Unfortunately that does not work.

 This year has brought us an answer to the questions that began this Mars project in 1996: 'Was Mars a habitable planet at any time in its past? Did water ever persist on the planet's surface?

 We may have had a 10th and 11th planet that collided. It's also possible that the outward migration of Neptune scattered comets and small planet bodies, inducing collisions in the asteroid belt. The close passing of a neighboring star could have had a similar effect.


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Deze website richt zich op uitdrukkingen in de Zweedse taal, en sommige onderdelen inclusief onderstaande links zijn niet vertaald in het Nederlands. Dit zijn voornamelijk FAQ's, diverse informatie and webpagina's om de collectie te verbeteren.


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