THE HUNT FOR EXOPLANETS

Meet the scientists who are hunting for worlds outside our Solar System in an attempt to find Earth-like planets that, like our own, could be hospitable to life.

Written by Jonathan O’Callaghan

Up until 1992 the thought that there might be other sentient life out there in the universe was one that was generally met with incredulity and disbelief. Those branding aliens as real were looked upon disdainfully, and the mere suggestion that humans were just one of many types of life in the cosmos was not one that was given much credibility.

However, the discovery of an exoplanet (one

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Methods of finding exoplanets

Transit method

As a planet passes in front of a distant star, it will cause a dip in the brightness of the star relative to us. Therefore, by measuring the brightness of many stars at once, we can detect the transits of planets as they pass in front of a star. This method is useful for finding a lot of planets, and it can also determine the mass and size of the planet as well as its orbital period. It is currently the favoured method of planet hunting, used by NASA’s Kepler telescope among many others.

Microlensing

This method of

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Imaging exoplanets

The James Webb Space Telescope

The most exciting area of planet hunting currently being developed is undoubtedly that of direct imaging. To directly image exoplanets, something known as a coronagraph is used, an instrument present on several telescopes including NASA’s Hubble Space Telescope. This blocks the light of the host star, allowing the scope to see around the star and possibly detect a planet. On the right of this page you can see an incredible composite image of a dust disc around the Fomalhaut star taken by Hubble, and within this disc a planet called Fomalhaut b was discovered on

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Stars with planets can be tracked on their chemical composition

Yes, the stars with low metallicity may be a planet, but it would be better that the protoplanetary cloud had more manganese and silicon. (Image NASA, JPL-Caltech, T. Pyle, SSC.)

For a long time the thesis of a direct connection with the presence of the metallicity of the star the planet is in doubt: even the stars had lower solar metallicity, could boast a throng of planets. On the other hand, no one could guarantee that stars with low content of elements heavier than helium planets do not, because to detect exoplanets alongside such luminaries much harder.

That's

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Foreign Land: WAITING FOR MONTHS

The outgoing year was memorable discovery in distant star systems, a number of interesting planets. But next year could be really memorable: probably the first time we will be able to find a true "twin" of our cozy Earth. Thanks to the work space telescope Kepler number of known extrasolar planets over the last year exceeded 700 — despite the fact that continue to analyze the data and wait for confirmation yet of the thousands of potential new discoveries. Only yesterday we wrote about a really significant event in this area, for the first time when it was possible to

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The revolution in astronomy recognized the existence of extraterrestrial life

March 6, 2012 10:10

Kepler found a bunch of planets in one constellation of the Milky Way. And if you look to the other?

Scientists believe that only in our galaxy — the Milky Way — there may be hundreds of billions of planets.

Scientists preliminary results of a fascinating study, which has recently become very fruitful. Specifically, has mapped the Milky Way, and counted the number of open exoplanets — that is, those who are outside the solar system, orbiting other stars — near and far. And it turned out that the number is, well over a

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The revolution in science: the Milky Way is inhabited

January 14, 2012 18:06

Scientists have come to the final conclusion that intelligent life beyond our Earth is not only possible, but also exist.

By counting the number of open exoplanets in the Milky Way, you will get a number greater than one thousand — 1235 exoplanets. But these planets have been found only in a very small area of the Milky Way in the constellation Cygnus — only four of the visible sky. And this "bust" with the planets is not surprising modern science, but it became the basis for the revolutionary conclusions. The journal Nature published the

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The revolution in astronomy recognized the existence of extraterrestrial life

January 13, 2012 18:43

Scientists believe that only in our galaxy — the Milky Way — there may be hundreds of billions of planets Vladimir Lagowski — 13.01.2012 Scientists preliminary results of a fascinating study, which has recently become very fruitful. Specifically, has mapped the Milky Way, and counted the number of open exoplanets — that is, those who are outside the solar system, orbiting other stars — near and far. And it turned out that the number is, well over a thousand, are too large.

Only NASA's Kepler space telescope (Kepler) for only 136 days of

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American astrophysicist proposed method of detecting extrasolar planets satellites

12.06.2008

Text: Mikhail Karpov

  Astrophysicist Darren Williams Behrend College of the University of Pennsylvania, USA, proposed a method by which you can detect satellites of exoplanets, according to Space.com. According to him, the satellite of the planet from another star system can be seen through their influence on the infrared radiation of the planet.

The satellites of exoplanets are of great interest to the scientific community, since it is possible for them there are the conditions for the existence of life. It is known that the

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Five of the most unusual exoplanet

25/01/2009

Search for planets orbiting distant stars — one of the most promising and interesting, but at the same time and the challenges currently facing astronomers. The main goal pursued by scientists, is search for extraterrestrial life, and if we can detect a planet in a distant star that is inhabited by living organisms, it would be the greatest discovery since the beginning of human observation of celestial objects.

 

PSR B1620-26 b SWEEPS-10 OGLE-2005-BLG-390Lb HD 149026b

Although the problem of finding extrasolar planets is very complicated

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