Although we have discovered many stars similar to the sun and many exoplanets similar to the Earth, a combination similar to the Earth-Earth has now been found for the first time. It is HD63433 and HD63433d. Astronomers discovered this star HD63433 as early as 2020.Type GV5 has a mass 99 times that of the sun, a diameter 912 times that of the sun, and an age of only about 414 million years, which is very young.
It was previously discovered that it has two larger planets, one HD63433b, with a diameter 2.105 times that of the Earth, and an orbital period of 7.1 days, and the other HD63433c, with a diameter 2.565 times that of the Earth, with an orbital period of 20.5 days.
latest discovery,It also has a smaller planet HD63433c with a diameter 1.043 times that of Earth, which is almost the same size.
However, it is very close to its star,The orbital period is only 4.2 days, and it is tidally locked., the temperature of the side facing the star is as high as 1530K, which is about 1300°C.
This is the first time humans have discovered a planet similar in size to the Earth and orbiting a star similar to the sun. Previously discovered Earth-like planets all orbited cold red dwarf stars.
More importantly, the HD63433 planetary system is only about 73 light-years away from the earth, making it a neighbor in the vast universe.
Next, we need to look for exoplanets that are in the habitable zone and have liquid water.