The article discusses papers that were published in the journal "Nature" on star formation in galaxies in the early universe. One paper by an international team of astronomers supports a t...
Stars on the main sequence burn by fusing hydrogen into helium. Large stars tend to have higher core temperatures than smaller stars. Therefore, large stars burn the hydrogen fuel in the core quickly, whereas, small stars burn it more slowly. The length of time that they spend on the main ...
Most galaxies haveblack holesat their centers that can produce a tremendous amount of energy, which astronomers can see over great distances. In some cases, a galaxy’s central black hole isextremely largeor active, even in relatively small galaxies. Material circling the black hole may be accel...
The Hubble Space Telescope is deployed from the cargo bay of the space shuttle Have you ever stared at the night sky and wondered what the universe looks like up close? Even if you're lucky enough to have access to a ground-based telescope, whose clarity depends on atmospheric factors ...
How did Andromeda's dwarf galaxies form? Hubble Telescope finds more questions than answers Into the deep (field) with ESA's Euclid 'dark universe' telescope: Space photo of the day Latest in Galaxies NASA diagnoses fracture in a 'huge cosmic bone' using X-ray observatory Gaze at a cl...
How are elliptical galaxies formed? How did the heliocentric theory impact the Scientific Revolution? How did the Arecibo Observatory telescope collapse? Describe asteroids, meteors, and comets. What is a crater s angular size? How was the Arecibo Observatory built? How did the Kuiper belt form?
the reason is that the longer light travels through space, the redder it becomes. For the most distant galaxies you have to look all the way into the infrared part of the spectrum, and only with the launch of James Webb did we have a telescope big and sensitive enough to see so...
Though we know much more about the processes of galaxy formation and evolution than we did even a decade ago, many key points still elude us. One particular puzzle is that of how star formationendsin a galaxy. We think that galaxies eventually transition from bright, blue, star-forming di...
How many galaxies are there in the universe? How can the universe be both infinite but expanding? How do you think the Universe is going to end? What is the Universe - space or matter? How many dimensions are needed to describe the universe? How did the mass of the universe come into...
2.According to the lecture, how did distant galaxies appear to eighteenth-century astronomers? A. Like the moons of planets B. Like small clouds C. Like variable stars D. Like bright points of light 你的答案: 正确答案:B 题目解析: 登录 后才能查看题目解析,还没有账号? 马上注册 推...