A. planet B. galaxy C. universe D. constellation 相关知识点: 试题来源: 解析 B。本题考查银河系相关的概念。选项A“planet”(行星)与银河系概念完全不同;选项B“galaxy”(银河系),我们的太阳系位于银河系中,符合题意;选项C“universe”(宇宙)范围太大,不准确;选项D“constellation”(星座)与银河系不...
62.A.细节理解题 根据第一段"The name of our galaxy (银河),the Milky Way,comes from its appearance.It's a milky white band of glowing light that spreads across the night sky."可知我们银河系的名字来源于它的外观.它是一条乳白色的发光带,遍布
The Milky way is vast It takes 100000 years for light to travel from one end of the galaxy to the other The fastest spaceship we've ever built Only one thousandth of the speed of light So aliens may not have ...
They have had to be changed. 75.From sitting at the center of the universe, we now find the earth orbiting(绕轨道运行) the sun, which is just one of millions of stars in our own Milky Way Galaxy(银河系).76.But this is not the end of a long history of research. Huge questions r...
小题3:推理题:根据第四段中“Earth’s galaxy is called the Milky Way”地球所在的星系叫银河系,常理可知星系是有很多星星组成的。故选C。小题4:推理题:根据第五段最后一句“The supermassive black hole at the center of the Milky Way galaxy has a mass equal to about four million suns and would ...
A Lyrid meteor crosses the Milky Way galaxy in this photo taken by Tina Pappas Lee on Fripp Island, South Carolina. The photo was taken at approximately 4:45 a.m. local time on April 22, 2020.(Image credit: Courtesy of Tina Pappas Lee) ...
If the Earth is typical, intelligent life could develop on other such planets and potentially develop interstellar travel. Even at a slow pace of colonization (a small fraction of the speed of light), the Milky Way galaxy could be completely traversed in a few million years, a tiny fraction...
In the usual and most widespread textbook picture of the Milky Way Galaxy, disk stars like the Sun are referred to as Population I, the spheroidal or halo component in turn as Population II. The latter is thought of as the pressure-supported, metal-poor relic of the early Galaxy, with re...
The second important reason is size—the universe is huge. "Tools like the Hubble Telescope(哈勃望远镜)have shown us that there are at least 100 billion galaxies, " says Shostak. "And our galaxy, the Milky Way, has at least 100 billion stars. Some planets going around these stars might ...
But in 2022, as Space.com previously reported, researchers identified an unusual rocky object coming from the Oort cloud. When the objects in the Oort cloud interact with passing stars, dust clouds or even the weak gravitational tidal forces created by the Milky Way galaxy, they may spiral ...