Scientists from the National aerospace administration of USA (NASA) announced the discovery of first planetary system comparable to the Solar for the number of planets orbiting the star. Discover the eighth planet in the system Kepler-90, this is considered to semiplaning, researchers helped artificial intelligence. How did this momentous discovery, and what it means for science in explaining the material LIGA.net.
WHERE TO START. In 2014, NASA scientists using the space telescope Kepler discovered a system of seven exoplanets orbiting the star is a yellow dwarf star in the constellation of the Dragon. Light, remote from the Sun of 2.5 thousand light years (about 780 parsecs), is called Kepler-90 (discovered within the mission of Kepler 90-th star, which was confirmed by the presence of the planet).
Planets have received names from the same Latin letters in order of their opening, b, c, d, e, f, g and h.
Kepler-90 can be called a miniature, compact version of the Solar system: the orbits in it are so close to each other that all of its planets would fit in the space between the Sun and the Earth.
As in Solar system, size of planets in Kepler-90 as their distance from the star increases. This pattern suggests that the gas giant planets in this system formed the same way as, for example, Jupiter and Saturn.
System – Solar analogs the number of planets, the researchers considered very rare in the Universe. Kepler-90 until you open it the eighth planet was one of the four known semiplaning systems – along with the TRAPPIST-1 in the constellation of Aquarius, HD 10180 in the southern constellation Hydra and HR 8832 in the constellation Cassiopeia.
HOW IT DEVELOPED. The majority of exoplanets impossible to find visually because of their large distance from the Solar system. Therefore, the Kepler telescope uses to find a method of transit photometry – watches for changes in the brightness of stars when passing through their prospective planets.
For nearly nine years in space, Kepler has collected a vast array of data. On this basis, we confirmed the existence of more than 2.5 thousand exoplanets, and about 5 thousand candidates awaiting verification.
However, to discover a new exoplanet prevent interference and various random factors. They also bothered to discover the eighth planet in the system Kepler-90, the existence of which the researchers suspected.
To confirm their guesses, NASA used a neural network, developed in collaboration with Google.
To begin with, the researchers trained the system to recognize the strong presence of planets in 15 thousands previously confirmed examples. Then the neural network has uploaded the data on 670 the stars, around which had previously found exoplanets. Thus, scientists wanted to test whether artificial intelligence to recognize not fixed people are weak signals about the passage of planets in disks of light.
The neural network has coped with this problem and discovered two new exoplanets – the sixth planetary system Kepler-80 (Kepler-80g) and eighth in Kepler-90 (Kepler-90i).
According to the researchers, Kepler-90i reminiscent of mercury: because of its proximity to the star (this is the third farthest planet from it), the average temperature of its rocky surface greater than 400 degrees Celsius – to put it mildly, unsuitable for life.
A planet so close to its sun that the conditional year (full rotation around the star) is equal to 14 earth days. The dimensions of Kepler-90i to 30% higher than earth’s.
WHAT WILL HAPPEN NEXT. Now Kepler-90 – the first known planetary system, except the Sun that has eight planets. And not recent, scientists believe. According to them, around studied Kepler stars can spin many satellites that have not yet opened.
Therefore, NASA will continue to use a neural network to search for new exoplanets around almost 150 thousand stars studied by Kepler. “This is just the beginning of a new method of hunting for planets,” intriguing, scientists say.
The researchers also announce the launch of new space telescopes that will continue to explore new worlds and “even tell you which of them may exist extraterrestrial life.”
See also: seven times heavier than Earth: scientists looking for life on another exoplanet