British astronomers have discovered in the constellation Hare a planet that makes one revolution around the star NGTS-10 in a record 18 hours. This was reported on February 20 by the scientific journal Monthly Notices of Royal Astronomical Society.
Scientists named the record-breaking planet NGTS-10b. Her secret is that only 2.5 million kilometers separate her from the star. In the solar system, Mercury is closest to the star. Moreover, from it to the Sun – about 58 million kilometers, and one revolution takes almost 88 days.
NGTS-10b is more than a thousand light-years from Earth. In size and mass, it is only one third inferior to the Sun. Researchers found the planet when they observed fluctuations in the brightness of its star – a yellow dwarf with an age of 10 billion years. Among other things, they found that NGTS-10b is about a third inferior to the Sun in size and mass.
According to James McCormack, a professor at Warwick University, planets such as NGTS-10b are extremely rare. They are so close to their stars that they pass through their discs, which makes it theoretically very easy to find. In fact, in recent years of research, astronomers managed to find only seven planets with an orbital period of less than a day.
However, a distinctive feature of NGTS-10b is that its orbit is not necessarily stable. Scientists suggest that it is gradually approaching the star, with the result that over the next decade the “year” on it will decrease by another seven seconds. According to astronomers, the planet will last another 38 million years, after which it will fall into the upper atmosphere of the star.
NGTS-10b is a hot jupiter. So scientists call gas giants that rotate so close to their stars that their atmosphere heats up to temperatures of 727-1027 degrees. This, in turn, leads to the fact that the atmosphere of the planets consists of unusual compounds: it can rain from rubies or sapphires, and at the heart of the clouds are lead and glass.