A。解析:第一个空,“the light from distant stars”是单数主语,谓语动词用“takes”;第二个空,“might”是情态动词,后面接动词原形“exist”。B选项第一个空“take”没有用第三人称单数形式;C选项第二个空“exists”形式错误;D选项第一个空和第二个空都错误。反馈...
their absorption lines equivalent widths and line ratios (Eisenhauer et al., 2005). In particular, their rotational velocities are similar to those of nearby Galactic disk B-stars. The central cluster does not contain any star earlier than O8V, although such stars do exist outside the central...
In this chapter we will focus on the disc-integratedsolar spectrum. It is particularly important when considering the Sun as a star, because then no horizontal spatial information can be gleaned and only the flux as a function of wavelength or/and time is available. Interestingly, the distribut...
If we pack much more matter into that small of a space, gravity wins out and the whole thing collapses into a black hole. Therefore, neutron stars exist in this precious balance of neutrons pushing against each other (known as neutron degeneracy pressure) and gravity. How long do neutron st...
But when they look at the stars, they turn emotional and believe that if aliens exist, they must be friendly and kind.I think it should be the opposite: Let’s turn the kindness we show toward the stars to mankind and build up trust and understanding between different peoples and ...
the length of time it takes for a white dwarf to reach this state is calculated to be longer than the current age of the Universe (approximately 13.8 billion years), and since no white dwarf can be older than the age of the Universe, it is thought that no black dwarfs yet exist. The...
Furthermore, there exist more recent catalogs of symbiotic stars, such as those compiled by Akras et al. [7] and Merc et al. [29]. BI Cru (= Hen 3-782 = WRAY 15-967): BI Cru is a D-type symbiotic object. It is one out of three currently known symbiotic stars in which CO ...
movement across the sky. The star with the highest proper motion isBarnard's Starin the constellation of Ophiuchus. It moves at about 10328.12 milliarcseconds declination and -798.58 milliarcseconds right ascension. A star with a larger proper motion could exist, but we have not discovered it ...
If nothing else, Tea Reader was heart-stoppingly beautiful; half Hawaiian, half Hungarian, five feet ten inches, and naturally possessed of the sort of proportions that most women insist exist only on foot-high plastic dolls. Her record company publicist once drunkenly confided in me that his...
That novel was composed of scratches on a page, dear. The characters inhabiting it have no life outside of those scratches. What happened to them? They all ceased to exist the moment the novel ended. 故事是由写在纸上的痕迹组成的。故事里的人物不会从痕迹里跑出来。之后会发生什么呢?当小说结...