An exoplanet or extrasolar planet is a planet outside our solar system that orbits a star. This is a list of habitable exoplanets and possible exoplanets. We are introducing you top 10 potentially habitable exoplanets, that is based on estimates of habitability by the habitable exoplanets catalog (HEC), and data from the NASA Exoplanet Archive. The HEC is maintained by the Planetary Habitability Laboratory at the University of Puerto Rico at Arecibo.
The American scientists analyzed the data collected by a Kepler space telescope in scattered cluster of stars on a joint of constellations of the Swan and Lira. In one of them the scientists found two small impossible planets. Earlier the existence of these plants was considered as the impossible. Soren Meibom (from the Harvard-Smithsonian center of astrophysics in Cambridge) and his colleagues analyzed the data collected by a Kepler space telescope at supervision over cluster of stars in constellations of the Swan and Lira. In total scientists tracked fluctuations in brightness of 377 stars. In the scattered congestion NGC 6811 in Swan constellation which is removed from on 3 thousand light years, they found two impossible planets which brightness periodically went down. Scientists tracked its changes and came to a conclusion that blinking of these stars arose because on their disk passed rather small giant planets of Kepler-66b and Kepler-67b, whose radius were more than terrestrial everything by 2,8-2,9 times.
The telescope Kepler found at once two potentially manned planets rotating round the general star. Only twenty years ago astronomers didn’t know about existence of similar planets, and the Solar system, even taking into account the latest discoveries in area of exoplanet, continued to be considered as the unique. However opening of planetary system at a star of Kepler-62 is capable to change this representation. Planets from this scattering differ by the size, and round a star they do a complete revolution for the period of 6 days to 9 months. Two most remote of these planets and the most suitable lives were open for emergence by the astronomer from the Washington University Eric Eygol. The most extreme, Kepler 62f probably a firm planet, by only 1,4 times of the continent, makes a turn round a star in 267 Earth days. Her neighbor, Kepler 62e, which has also got to a zone of a habitability, in 1,6 times more Earth, year on it makes 122 Earth days, and from a star she receives 20% more energy, than our planet.
Astronomers from Japan and New Zealand offered new strategy of search of the Earth-sized planets, which number in our galaxy scientists estimated at 100 billions pieces. Strategy is based on a gravitational microlensing method. In the research astronomers suggested to combine the information obtained from space observatory “Kepler” and as a result of application of a gravitational microlensing. The combination of two techniques will allow to find Earth-sized planets, which are in orbits from 0,5 to 10 astronomical units (distance from Earth to the Sun). The planet of the terrestrial sizes on considerable removal from a star can’t almost be found a transit method which is applied on a telescope “Kepler”. The space observatory fixes falling of brightness of a star when the planet passes between it and Earth. Thus, “Kepler” is capable to find about 17 billions planets of terrestrial type in the Milky Way. The transit method of supervision exoplanet is the most widespread, on an equal basis with a Doppler method.
Astronomers discovered a little exoplanet, which has less dimensions and weight, than the smallest planet Mercury in the solar system. The planet Kepler 37b moves around the star in Lira constellation every 13 days. It has 210 light years distance from the Earth. This planet is stone planet, and has approximately 427 Celsius temperature, because of that fact, there cannot go any speech about life.The moon-size Kepler 37b is so close to its parent star, at just 0.10 AU, that it likely has no atmosphere or liquid water on its surface.Kepler 37b was discovered by telescope “Kepler”. The $600 million Kepler mission launched in March 2009, and has found more than 2,740 candidate alien worlds so far.
Astronomers have previously detected superflares from a variety of star types, which release bursts that have 10 to 10,000 times more energy than the largest solar flare ever detected from our sun. Scientists wanted to know how common these outbursts might be from stars like the sun, those with masses and temperatures similar to our star. Even normal solar flares can damage satellites, endanger astronauts and wreak havoc on electrical grids on Earth, suggesting that superflares might be catastrophic to life on Earth.
Astronomers have discovered at least one unseen alien planet, and possibly another, around a distant star by observing the odd behavior of a planet already known to orbit the same star. The newfound planet has about the mass of Saturn and orbits its host star once every 57 days. It was revealed by its gravitational effects on the previously known planet around the parent star KOI-872. The find is an apparent validation of what scientists call the transit timing variation method of finding extrasolar planets.
As said alien solar systems that are home to so-called Hot Jupiters are unlikely homes for Earth-like planets. Hot Jupiters get their name from the fact that they are approximately Jupiter’s size, but extraordinarily near their stars, at about a tenth of the distance from Mercury to our sun. These roaster planets are among the alien worlds that astronomers have discovered most often since their size and proximity to their parent stars mean they exert large gravitational tugs on their hosts that scientists can readily spot.
As space agency announced on April 4 NASA’s prolific Kepler space observatory, which has discovered more than 2,300 potential alien planets to date, will keep hunting strange new worlds for at least four more years. The $600 milllion Kepler observatory launched in March 2009 on a mission to find Earth-size planets in the so-called habitable zones of their parent stars, a just-right range of distances that could support liquid water and, perhaps, life as we know it.