There are different types of galaxies in the universe. Some are spiral galaxies like the Milky Way. Some are elliptical galaxies. And some are irregular galaxies. The shape of our Milky Way galaxy is___. A. spiral B. elliptical C. irregular D. circular 相关知识点: 试题来源: 解析 ...
NASA and The Hubble Heritage Team Astronomers have estimated that there are around 200 billion galaxies in the observable universe. But when we see other types of galaxies portrayed in science-fiction films, they tend to have the same basic shape as ours. This would be an example of our ...
In 1926, Edwin Hubble put forward the first-ever morphological classification scheme for galaxies; the Hubble’s classification. It recognizes three major types of galaxies; Elliptical, Spiral, and Lenticular. These broad categories of galaxies are subdivided to form a system called tuning fork diagra...
Spiral galaxies are the most common type in the universe. OurMilky Wayis a spiral, as is the rather close-byAndromeda Galaxy. Spirals are large rotating disks of stars and nebulae, surrounded by a shell of dark matter. The central bright region at the core of a galaxy is called the “g...
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Stellar-mass black holes are the result of a star around 10 times heavier than the Sun ending its life in a supernova explosion, while supermassive black holes found at the center of galaxies may be millions or even billions of times more massive than a typical stellar-mass black hole. ...
Besides our Milky Way galaxy, there are millions and millions of galaxies in the known universe. The Hubble Space Telescope discovered more than 10,000 galaxies by viewing a small part of space continuously for 12 days. What is the Milky Way?
The halo and the central bulge together are called the spherical component. How many galaxies are there in a universe? Recent estimates put the total number of galaxies in the universe at about a couple hundred billion. This would mean that the total number of stars in the universe are ...
Elliptical galaxies have less dust than their spiral counterparts, and so the star-making process has all but ended. Most of their stars are older. Although they make up a smaller portion of the visible galaxies, astronomers think that over half the galaxies in the universe are elliptical. ...
Elliptical Galaxies Less than one in seven galaxies in our universe are elliptical galaxies. As the name suggests, these galaxies are either range from having a spherical to egg-like shape. In some regards they look similar to large star clusters, however, the presence of large amounts of dar...