题型:阅读选择 题类: 难易度:困难
浙江省嘉兴市平湖市2022-2023学年九年级人文(阅读)上学期英语期末抽测试卷(2022.12)
An international team of scientists says it has discovered two new"super-Earth" type planets about 100 light-years away, one of which may be suitable for life.
Unlike any of the planets in our solar system, the nearly 1, 600 known super-Earths are larger than Earth, but lighter than icy planets like Uranus and Neptune.
Researchers at Belgium's University of Liège said that they found another one while using Earth-based telescopes to check the existence(存在) of a different planet first discovered by a NASA satellite in the same solar system.
NASA's satellite found planet LP 890-9b, which is about 30% larger than Earth and orbits its sun in just 2. 7 days. ULi ège researchers used their telescopes in Spain to take a closer look at the planet. That's when the stargazers(天文学家) discovered another planet, LP890-9c, which is 40% larger than Earth and takes 8. 5 days to orbit its sun.
Francisco Pozuelos, a researcher, said that the planet could be suitable to life though being a 3. 7 million miles from its sun. Earth, by comparison, is located over 93 million miles away from our sun. "Although this planet orbits very close to its star, at a distance about 10 times shorter than that of Mercury around our Sun, the amount of stellar irradiation(照射) it receives is still low, and could allow the presence of liquid water on the planet's surface, if it has enough air, " Pozuelos said. "This is because the star LP 890-9 is about 6. 5 times smaller than the Sun and has a surface temperature half that of our star. "
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