Instead, astronomers rely on a star'sphotosphereto determine its size. The photosphere is where the star becomes transparent to light and the particles of light, or photons, can escape the star. "As far as an astrophysicist is concerned, this is the surface of the star, as this is the...
A. The sun is the largest star in the universe. B. The moon has no light of its own. C. Planets always move in a straight line. D. Stars are all the same size. 相关知识点: 试题来源: 解析 B。本题主要考查对科普知识的理解。A 选项,太阳不是宇宙中最大的恒星,错误。C 选项,行星的...
Nebulas, or vast clouds of gas that often condense to become new stars, also have impressively large sizes. NGC 604 in the Triangulum Galaxy is commonly cited as one of the largest; it's roughly 1,520 light-years across. Galaxies are collections of star systems and everything inside those...
The majority of all stars in our galaxy, and even the Universe, are main sequence stars. Our Sun is a main sequence star, and so are our nearest neighbors, Sirius and Alpha Centauri A. Main sequence stars can vary in size, mass and brightness, but they’re all doing the same thing: ...
It all depends on what you mean by a "thing". The biggest physical object is probably a star. The largest possible red giant star could be as big as 2,100 times the size our Sun. Placed inside our own Solar System, a monster star like this would extend out past the orbit of Saturn...
What did Pythagoras discover about the stars? What is the brightest star in the Cancer constellation? What constellation contains the star Antares? What are small stars called? What is the name of the largest space telescope? Who discovered the Orion constellation?
thesunisthelargestsourceofbluelight.Moreover,bluelightisalsopresentinLEDlight.Butif bluelightisn?tharmful,then whyare weconstantlyrubbingoureyeswhen we?relookingat ourscreens? Theansweriseyestrain(眼疲劳): Morethan60percentofpeopleexperienceeye problemsassociated with digitaleyestrain.And bluelight,itseems...
What’s the brightest star you can see in the sky tonight? If you live below 83 degrees north latitude, the brightest star in the sky is Canis Alpha Majoris, orSirius. Seriously, (bad pun intended) the -1st magnitude star is usually the fifth brightest natural object in the sky, and ...
The largest known Galaxy is IC 1101, discovered by Sir William Herschel There are four main types of galaxies (Spiral, Lenticular, Elliptical, Irregular)Galaxy's centre? No one knows for sure. Some say it is a super-star, a collection of bright stars or a super-black hole. The centre ...
tookpartinwhatwasthelargestanimalrescueoperationever. Awarehousewasturnedintoarescuecenternearthehabitatandhundredsofpoolswerebuilt toholdabout100oiledbirdseach.Whenwalkingintothecenter,Icouldn?tbelievemyears.Ihad expectedtowalkintoachorusofhonkingandsquawking(尖声叫).Instead,thecentersounded likealibrary.Thepe...