New Dwarf Planet Found in Our Solar SystemCalla Cofield,SPACE.com
Scientists yesterday made the dramatic announcement that they had found the first new planet in the solar system in three quarters of a century. The planet " a giant lump of rock and ice, more than nine billion miles from the Sun " is the first to be discovered since Pluto in 1930. ...
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。
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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...
six or seven planets. Now it became clear that the ”perfect” system of the past had been incomplete. Uranus was a planet which was larger than all the inner planets and could not be neglected. 1 Moreover, the discovery of Ceres in 1801 (i.e. only twenty years later) and ...
“It’s a useful planet because it may be like an early Earth,” says Soares-Furtado. Here is what scientists know about the planet: The planet is known as HD 63433d and it’s the third planet found in orbit around a star called HD 63433. ...
found another one while using Earth-based telescopes to confirm the existence of a different planet initially 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,LP 890-9,in just 2.7 days...
The other planet was discovered circling a star called 55 Cancri, which already has three known planets. The discovery of the new planet, using the Hobby-Eberly Telescope in Texas, makes 55 Cancri the first quadruple planetary system found beyond the Solar System. ...
One of them is a gas giant at least 5.6 times as massive as Jupiter, the largest planet in the solar systemIt was detected around a star known under the scientific designation HD28185.Many of the previously discovered extrasolar planets of similar size were found close to stars or revolved...