B) liquid waterC) enough radiationD) the size of a planetAccording to de Wit, what is the possible reason for astronomers' failure to discover a planet orbiting an ultracool dwarf?A) There is no such planet at all.B) No one was observing ultracool dwarfs.C) Ultracool dwarfs are too ...
根据第五段中Only,under that steam atmosphere there could possibly be liquid water at high pressure.(只是,在蒸汽的大气层下,可能存在高压下的液态水)可知,开普勒-138d行星可能含有高压液态水。故选D。(3)细节理解题。根据最后一段The "water worlds" are outside their star's habitable place—the area ...
Saturn's largest moon, Titan, is the only body beyond Earth known to host stable bodies of liquid on its surface. (Image credit: NASA/JPL/University of Arizona/University of Idaho) Scientists have known for a while that Saturn's largest moon, Titan, has rivers and sea...
Maybe they're carbon based Liquid water is needed, and the technology is based on radio waves What else are we looking for? But there is no evidence that aliens look like humans Not even anything we can imagine T...
Current experiments are teaching us how many exoplanets there are, what the conditions are on those planets, how common it is for exoplanets to have surface temperatures that allow for liquid water, and possibly how many exoplanets exhibit atmospheric abundances that favor the existence of life. We...
If you lived on one of them,you could possibly see the clouds around the next planet.More importantly,three of the planets are at the perfect distance (距离) from the Sun. (5) If there is liquid water (液态水),there could be life. For scientists,the finding is not an end.Next,they...
"Even if diamond planets are only one in a billion, the vast size of the universe means there could still be trillions of diamond planets in the niv s These worlds contain far more carbon than Earth. Near their cores, the planets are also believed to contain liquid silicon carbide (碳化硅...
particularly for those that orbit in the host star's habitable zone. Also known as the "goldilocks zone", this is the region of the solar system where conditions are warm enough (but not too warm) so that it is possible for liquid water (and therefore life) to exist on the planet's ...
planets orbit very close to their star, and only the outer two have orbits larger than Mercury in our system. The green areas represent each star’s “habitable zone,” which is the distance from the star where we calculate that surface temperatures would be consistent with liquid water. The...
Why are planets and moons sphere-shaped? Why is Uranus the coldest planet in the solar system? What makes Saturn different from other planets? Why do Uranus and Neptune contain no liquid metallic hydrogen?Explore our homework questions and answers library Search Browse Browse by subject Ask a...