發現遙遠類地行星的大氣層：宇宙格局的重大改變！

A group of scientists has made a major breakthrough in the search for life beyond our solar system. They have discovered an atmosphere around a rocky planet called LHS 1140b. This planet is about 48 light-years away from Earth and orbits a small, cool red star. What makes this discovery so important is that LHS 1140b is located in the 'habitable zone' of its star. The habitable zone is the area around a star where the temperature is just right for liquid water to exist. Water is a key ingredient for life, so planets in this zone are of great interest to scientists.

The researchers found that the atmosphere of LHS 1140b contains helium. Helium alone cannot support life, but the scientists believe there could be other gases in the atmosphere that they have not detected yet. Dr Collin Cherubim from Harvard University, who led the study, said this is the first time anyone has found an atmosphere around a rocky planet in the habitable zone of another star. This is a big step forward because, until now, no one had found an atmosphere on a planet like this.

The discovery is important because it brings us closer to answering one of the biggest questions in science: Are we alone in the universe? For a planet to support life, it needs to have water and an atmosphere. The fact that LHS 1140b has an atmosphere means it could have the right conditions for life. Other planets, like K2-18b and the TRAPPIST-1 planets, are also being studied for signs of life. However, LHS 1140b is the first rocky planet in the habitable zone with a confirmed atmosphere. Scientists are excited about what they might find next as they continue to search for life on other worlds.