根据“And in the center of our galaxy is a black hole. It’s called Sagittarius (人马座) A.”可知,“人马座A”是我们银河系中心的一个黑洞。故选D。 (2)题详解: 词句猜测题。分析“A black hole is a place where matter is so dense that the pull of its gravity(引力) is very, very ...
Scientists have long believed that there is a black hole in the center of our galaxy(星系), the Milky Way. But last Thursday, scientists released the first image(画像) ever of this black hole. The scientists hope the image will help them learn more about black holes and how they work.Al...
Nemesis Theory proposes that there is a second sun in our solar system, a death star that will one day cause mass extinction on Earth.
Does that mean either researcher is convinced that there's a black hole in our solar system, or even thinks there's probably one out there? No, they both said. It's possible that the TNO anomaly doesn't really point to a single heavy object, or that the OGLE anomaly is a fluke, or...
Are there gas planets in the Kepler-62 solar system? What are the characteristics of outer planets? What is an extrasolar planetary system? What is the shape of a black hole? What shape is a black hole? What is the geocentric model of the universe?
B. There is a black hole at its center. C. It's the biggest spiral galaxy in the universe. D. It takes 100, 000 years to get there from Earth.Which of the following is the main factor in categorizing galaxies? E. Shape. F. Size. G. Number of stars. . Distance from the sun....
根据SPIRAL GA LAXIES部分的"Our solar system is located on one of the arms of the Milky Way. Our galar y has a huge black hole at its center that billi ons of stars circled around."(我们的太阳系位 于银河系的一个旋臂上。 其中心有一个巨大的黑 洞,由数十亿颗恒星环绕。 )可知银河系...
C.Returning a tent. 11.What is the woman's motivation for climbing? A.To have fun. B.To improve her fitness. C.To get close to nature. 12.Where will the speakers do rock climbing together? A.At a gym B.In the...
Scientists have long believed that there is a black hole in the center of our galaxy(星系), the Milky Way. But last Thursday, scientists released the first image(画像) ever of this black hole. The scientists hope the image will help them learn more about black holes and how they work. ...
There is evidence that Algol systems—that are interacting intermediate-mass binaries—are depleted in C (Tomkin et al. 1993; Sarna and De Greve 1996). Note that the mass-budget values discussed above should be revised in this scenario because only a fraction of the massive AGB stars should ...