you need
  • - telescope.
search of new planets is for astronomers, and for humanity as a whole, not just a matter of knowing the world.People do not leave hopes to find other civilizations in the universe, and recent studies have strengthened the belief that humanity is not alone.
solar system is part of the Milky Way galaxy.When you see the Milky Way in the sky, you must understand that this is our galaxy.It has the shape of a disk, the solar system is almost on its outskirts.
Our star system consists of nine planets in their order from the sun: Mercury, Venus, Earth is below, and then Mars, Jupiter, Saturn, Uranus, Neptune and Pluto.The first four planets are considered to be inner planets of our solar system, and the rest - external.
Planets outside our solar system, called exoplanets scientists.Due to space telescope, allowing to explore the starry sky with a very high resolution, so far, astronomers were able to detect in our galaxy alone, more than 700 confirmed planets!And given the planet whose existence has yet to confirm their number passes for 1000!
Scientists are trying to study the characteristics of the detected planets.Most of them are unsuitable for life, but there are some that are much like Earth.The probability that some of them have a life, is quite large.It should be borne in mind that in our galaxy more than 50 billion stars - so many it's hard to imagine.At the same time about 20 billion of them may have a planet.This is the conclusion scientists have done research-based Space Telescope "Kepler" - 44% of them studied the stars were discovered planet.Considering the total number of stars in our galaxy, it is clear that discovered the planet at the moment are only a tiny fraction of their real number.
To find planets in other galaxies is very difficult because of their remoteness.However, scientists have assured that the number of planets in other galaxies billions.This is evidenced by the total number of galaxies in the universe - as calculated by astronomers of over a hundred billion.And in each of them - hundreds of millions of stars.Therefore, the total number of planets in the universe seems truly overwhelming.
Today scientists are big enough to speak confidently about the opening of several planets in other galaxies.To see them through a telescope can not be so distant planets can be calculated based on the effects produced by gravitational microlensing.The presence of a planet causes the gravitational distortions of light that can be detected using sensitive instruments.
In 2013, the telescope "Kepler" has failed.However, based on the data it has already passed and now scientists continue to discover more and more of the planet.