The Kepler mission has detected thousands of exoplanets since 2014, 30 of which are less than twice the size of the Earth today known to circle in the habitable zones of their stars.
The Kepler mission was launched on March 7, 2009 from Cape Canaveral. Telescope has helped find planets outside the solar system.
On September 25, 2018, his last picture was taken and five days later the fuel was used up.
When it started, it weighed 1,052 kg and was 4.7 m long and 8.9 ft wide 2.7 m).
The satellite usually looks for Earth-like planets, meaning they are rocky and orbit within the habitable zone or Goldilocks zone of a star.
In total, Kepler has found around 5,000 unconfirmed exoplanet candidates, and another 2,500 confirmed exoplanets that scientists have now proven to be real.
Kepler is currently on mission to discover more exoplanets ̵
K2 is the spacecraft's second mission and was implemented out of necessity over the request when two spacecraft reaction wheels failed.
These wheels control the direction and height of the spacecraft and help steer it in the right direction.
The modified mission examines exoplanets for weak red dwarf stars.
While the planet found thousands of exoplanets during its eight-year mission, five in particular have dropped out.
1) "Earth 2.0"
In 2014, the telescope made one of its greatest discoveries when it identified the exoplanet Kepler Although it is 1,400 light-years away, it shares many features with our planet.
It has an Earth-like orbit, receives approximately the same amount of sunlight and has the same Length of the year.
Experts are still not "you are not sure if the planet is home to life, but sa If plants were transferred there, they would probably survive.
2) The first planet orbiting two stars
Kepler found a planet orbiting two stars, known as a binary star system in 2011.
The system known as Kepler-16b is about 200 light-years away from Earth.
Experts compared the system to the famous "Double Sunset" pictured on Luke Skywalker's home planet Tatooine in Star Wars: A New Hope.
3) Finding the First Habitable Planet Outside the Solar System
Scientists found Kepler-22b in 2011, the first habitable planet that astronomers had found outside the solar system.
The habitable super-earth appears to be a large rocky planet with a surface temperature of about 72 ° F (22 ° C), similar to a spring day on Earth.
4) Discovery of a "Super Earth"
The telescope found its first "Super Earth" in April 2017, a giant planet called the LHS 1140b.
He orbits a red dwarf star at a distance of about 40 million light-years, and scientists believe it contains gigantic oceans of magma.
5) Find the & # 39; Trappist 1 & # 39; star system
The Trappist 1 Star system, which houses seven Earth-like planets, was one of the greatest discoveries of 20 17
Each of the planets orbiting a dwarf star for only 39 million light-years probably holds water on its surface.
Three of the planets have such good conditions that scientists claim they have already developed their lives.
Kepler discovered the system in 2016, but scientists unveiled the discovery in a series of publications released in February this year.
Kepler is a telescope with an incredibly sensitive instrument known as a photometer and the smallest of changes of the light emitted by stars.
How does Kepler discover planets?
The telescope has an incredibly sensitive instrument Known as a photometer that detects the slightest changes in the light emitted by stars.
It tracks 100,000 stars simultaneously and seeks telltale drops of light intensity that indicate a planet orbiting the satellite and its distant target.
When a The planet is moving in front of a star as seen from Earth and is referred to as a "transit".
Tiny dips in the brightness of a star during a transit can help scientists determine the orbit and size of the planet as well as the size of the star.
Based on these calculations, scientists can determine if the planet is in the "habitable zone" of the star and therefore whether it could accommodate the conditions for the growth of alien life.
Kepler was the first spaceship to survey the planets in our own galaxy, and over the years their observations confirmed the existence of more than 2,600 exoplanets – many of which could be important targets in the search for extraterrestrial life