In this episode, our good friend Professor Jonti Horner, from the University of Southern Queensland, is back to help us answer a big mystery... is there life in other galaxies? We go looking for Alien life in other parts of the Universe to see who or what, is out there....
根据第二段中“Tools like the Hubble Telescope have shown that there are at least 100 billion galaxies”可知宇宙中有至少1000亿个星系。故填At least 100 billion.【小题2】根据第二段中“And our galaxy, the Milky Way, has at least 100 billion stars.”可知地球所在的星系是银河系。故填In the ...
The Earth: The Only Planet with Intelligent Life (3)Why was it hard to look for signs of intelligent life in the universe in the past? A. Because there were not any smaller planets. B. Because there were not any powerful telescopes. C. Because the astronomers were not interested in ...
Life in every body form and size you can imagine. Now imagine the other universe where life is nowhere to be found. Stars collide, galaxies explode, meteorites crash, asteroids everywhere. 想象一下有两个宇宙存在。在其中一个宇宙中,每一个星球上,生命都繁荣不息。有的飘荡于空中。有的遨游于大海...
15.Is there intelligent (有智力的) life on other planets?For years,scientists said"no."or"we don't know."But today this is changing.Seth Shostak and Alexandra Barnett are astronomers(天文学家).They believe intelligent life exists (存在) somewhere in the universe.They also think we sill soo...
The presence and distribution of dark matter in elliptical galaxies is expected to be constrained not only by the properties of the overall force field (as could be traced by an H I rotation curve), but also by the density and velocity dispersion profile of the luminous stellar component, ...
"This is long enough for other planets to have intelligent life," say Shostak and Barnett.The second reason is size---the universe is huge. "Tools like the Hubble Telescopes(哈勃望远镜)have shown that there are at least 100 billion galaxies," says Shostak. "And our galaxy,the Milky Way,...
根据第三段 In the past. it was hard to look for signs (迹象) of intelligent life in the universe. But now, powerful telescopes (高倍望远镜) allow scientists to discover smaller planets-the size of Mars or Earth-in other solar systems. These planets might have intelligent life.在过去,很...
科学家们认为世界上存有生命已有几百万年的历史了. Scientists there has been life for years. 2.我们还没有在其他行星上发现生命. We haven’t on other . 3.科学家们已经在宇宙中发现了许多别的星系. Scientists many other in the . 4.弄清
1.Is there intelligent (有智力的) life on other planets?For years,scientists said"no."or"we don't know."But today this is changing.Seth Shostak and Alexandra Barnett are astronomers(天文学家).They believe intelligent life exists (存在) somewhere in the universe.They also think we sill soon...