Re: No comments on a new planet in our solar system?Achernar
句中有明确的时间状语last year(去年),表示过去某个特定时间发生的动作,所以要用一般过去时,discover的过去式是discovered。A选项是原形,用于一般现在时;C选项是现在完成时,表示过去发生的动作对现在造成的影响或结果,这里没有这种语境;D选项是一般将来时,表示将来的动作,均不符合题意。
New Dwarf Planet Found in Our Solar SystemCalla Cofield,SPACE.com
32.C 细节理解题.根据句子Astronomers now believe there may be thousands of previously unknown objects orbiting the Sun at this distance,这里天文学家相信是有可能而不是一定,所以A选项不正确;根据句子Astronomers have discovered a new PINK planet on the edge of our solar system一个新的发现但是不是第...
This gravitational shepherding could explain why the most-distant objects in our Solar System have similar orbits and these orbits keep them from ever approaching the proposed planet too closely, which is similar to how Pluto never gets too close to Neptune even though their orbits cross, according...
所以选项B不正确;根据句子The small planet---given the name 2012VP 113 by scientists---is 80 times further from the Sun than the Earth可知D选项不正确.But the latest discovery suggests that our solar system has a number of planets at its edges可知最新的发现表明我们的太阳系边缘有许多行星.所以...
Read the full-text online article and more details about "Meet Xena, the First New Planet to Be Found in Our Solar System since Pluto ; Minus 400F and Made of Unwelcoming Rock and Ice, Our Newest Cosmic Neighbour Has Had Astronomers Racing against One An
NASA’s new citizen science platform, Planet Patrol, invites the public to collaborate with professional astronomers in searching for exoplanets using star-studded images from the TESS satellite. HelpNASAfind exoplanets,worlds beyond our solar system, through a newly launched website calledPla...
Just as the Moon rocks brought home by Apollo astronauts revolutionised our understanding of early Solar System history, so materials from the Red Planet are likely to recast our thinking on the possibilities for life beyond Earth. But Nasa now acknowledges the way it's going about achieving the...
"They let us piece together the history of our Solar System. But almost all of these icy worlds are painfully small and faint: it's really exciting to find one that's large and bright enough that we can study it in detail." The new dwarf planet is estimated at roughly 700 kilometers...