At the time of its construction in the 1950s, the Dwingeloo Radio Observatory was the largest rotatable telescope in the world with a dish diameter of 25 meters. It was quickly overtaken in the rankings but was used by astronomers for decades until it slowly fell into disuse in the early ...
题目Telescopes(望远镜)have come a long way since the first ones were invented early in the 17th century.Traditional telescopes allow astronomers to view objects in space thanks to the visible(看得见的)light those objects emit(发出),or reflect.However,for modern telescopes,any Electr...
Galileo was one of the first people to use a telescope to study the sky. Since then telescopes have become the most important tool used by astronomers. Scientists never stop finding new ways to make these instruments more powerful. In the next several years two new telescopes with different pu...
Astronomers have used the James Webb Space Telescope to spot several of the building blocks of stars, planets, and even life in ice form swirling around two infant stars, or "protostars." The complex organic molecules (COMs) spotted range from relatively simple molecules to complex compounds. ...
Black holes are used by astronomers to study how quasars come into being.C. When different galaxies meet in space, the black holes become bigger and biggerD. Some scientists think there’s one black hole in a galaxy, but others think there’re two.64. From the second paragraph we can ...
A Dobsonian telescope is a type of Newtonian telescope which is created for increasing the sizes of telescopes available for purchase and use by amateur astronomers. Answer and Explanation:1 The Dobsonian telescope was created by John Dobson in 1965. Dobsonian telescopes feature simplified designs that...
Four hundred years ago, an Italian scientist named Galileo Galilei became the first person to see the craters(环形山) on the moon. Galileo was one of the first people to use a telescope to study the sky. Since then, telescopes have become the most important tool used by astronomers. Scienti...
Astronomers seldom use large telescopes for visual observations. Instead, they record their data for future study. Modern developments in photoelectric imaging devices are supplanting photographic techniques for many applications. The great advantages of detectors such as charge-coupled devices is their hig...
B. Black holes are used by astronomers to study how quasars come into being.C. When different galaxies meet in space, the black holes become bigger and biggerD. Some scientists think there’s one black hole in a galaxy, but others think there’re two.64. From the second paragraph we ...
Of all the inventions used in astronomy, the telescope is the most important instrument for astronomers. Whether they use it atop a mountain in a huge observatory, or in orbit, or from a backyard observing spot, skygazers are benefitting from a great idea. So, who invented this incredible ...