Planets are large bodies that orbit stars. What does this sentence mean? A. Planets are small bodies. B. Planets are stars. C. Planets are large bodies that move around stars. D. Planets are comets. 相关知识点: 试题来源: 解析 C。这句话的意思是行星是围绕恒星运行的大天体,答案是 C。A...
f, etc. There is no planet named 'a' because a represents the star. Some stars, such as Algieba and Fomalhaut, will have common names, but others will have more cryptic names, such as Kepler 47. Kepler is the name of a satellite in space that first spotted the star and then the p...
This dimming would come and go as the planet orbited the star, passing alternately (交替地) behind and in front of the star regularly.可知,当行星经过恒星时就会阻挡一些光线,也就是说经过的行星引起了TRAPPIST – 1 轻微的昏暗。D选项正确。 【4】段落大意题。根据文中第四段的astronomers expected ...
It was in this way that astronomers Udry and collaborators discovered a planet whose mass is only fi ve times that of the Earth, in orbit about a star known as Gliese 581. The orbital period is just under thirteen days. The parent star, approximately twenty light years distant, has only...
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Watch a distant planet's vast orbit in spectacular time-lapse Scientists don't know what these mysterious planets are made of NASA thinks space is teeming with planets that have gone rogue Cheops confirmed the orbital period of the third planet in the star system, the key to figuring out the...
HD II964 d by Any Other Name: What to call the planets we find beyond our solar system?This article advocates the naming of planets that orbit other stars. It refers to extrasolar planets or exoplanets designated by the International Astronomical Union (IAU). According to a policy set by ...
In the past 20 years, astronomers have confirmed the existence of nearly 1,900 planets that orbit stars other than our sun. These findings have led researchers to speculate which moons, planets and stars might be the best at supporting recognizable forms of life. Scientists have even investigated...
Giant planets orbiting faraway stars. Presents news about planets that orbit other stars. The question of how many stars in the Milky Way galaxy harbor planets; The number of planets detected t... Marcy,Geoffrey,W.,... - 《Scientific American》 被引量: 6发表: 1998年 加载更多来源...
that they are made of. Other properties are more of a function of the planet’s environment, like how far it is from the sun. The planets that humans know best are those in our own solar system — but these truths are not necessarily universal for planets that orbit other stars. ...