Space is huge, a study found in the Milky Way galaxy teeming with billions of Earth-sized planets, orbiting stars like our sun and existing in the Goldilocks region – neither too hot nor too cold for life.
Astronomers using NASA data have calculated that for the first time in our galaxy alone, there are at least 8.8 billion Earth-sized stars in the habitable temperature zone. The study was published in the journal Proceedings of the National Academy of Sciences.
That there are planets with intelligent life like on Earth, that is, 8.8 billion biological dice, so the possibility of a second Earth is very large. A method for finding suitable planets and analyzing and evaluating their atmospheres.
In the Milky Way, about 1 in 5 stars have the same size, temperature, color and age, and there are planets the size of Earth and in the habitable zone where water can exist in liquid form, according to a complex calculation based on four years of NASA Kepler telescope observations.
The Kepler telescope scanned 42,000 stars, checking minute fluctuations in their brightness to gauge how many Earth-like planets there are. Scientists then extrapolated this to the rest of the galaxy, which contains hundreds of billions of stars. Kepler scientist Natalie Batalha said there was still a lot of data to go through before this could be considered a definitive number.
There are about 200 billion stars in our galaxy, 40 billion of them like our sun. One of the co-authors estimates the number of sun-like stars at nearly 50 billion, meaning there will be at least 11 billion planets like ours. An earlier study found that 15% of stars more common than red dwarfs have Earth-sized planets close enough to be in the Goldilocks zone neither too hot nor too cold. Scientists at a second Kepler science conference said they found 833 new candidate planets with the space telescope, bringing the total number of planets they discovered to 3,538, but most are not suitable for life.
Hoang Quoc Phuong- AT