Everything else in the galaxy revolves around this powerful gateway to nothingness. In its immediate surroundings is a tightly packed region of dust, gas and stars called the galactic bulge. In the case of the Milky Way, this bulge is peanut-shaped, measuring 10,000 light-years across,accordi...
This is how our galaxy became known as the Milky Way.There are about 200 billion stars in the Milky Way , including the sun. If you tried to count themone by one,it would take you over 3000 years! The thickest part of the Milky way is about 10000 lightyeats. The diameter(半径) of...
Milky Way plane means that dust obscures those that are more than a few thousandlight-yearsfrom the Sun. Byanalogywith open clusters in external galaxies similar to the Galaxy, it is surmised that they follow the general distribution ofintegratedlight in the Galaxy, except that there are ...
The Milky Way Galaxy is an immense and very interesting place. Not only does it measure some 120,000–180,000 light-years in diameter, it is home to planet Earth, the birthplace of humanity. Our Solar System resides roughly 27,000 light-years away from the Galactic Center, on the inner ...
It lies on the far side of the galaxy from us and is heavily obscured by the intervening gas, dust and stars. It is approximately 78000 light years away and about 10000 light years in diameter. It is orbiting our galaxy in a period of about 1 billion years but it cannot be expected ...
急!请英语物理强人进来帮做道题,谢谢1.Our galaxy, the Milky Way, has a diameter (proper length) of about 1.2 105 light-years. As far as an astronaut is concerned, how long (in years) would it take to cross the Milky Way, if the speed of the spacecraft is 0.99549c?
inMilky Way Galaxy Also known as: The Galaxy Written by Paul W. Hodge Professor Emeritus, Department of Astronomy, University of Washington, Seattle. Author ofThe Andromeda Galaxy;Higher then Everest: An Adventurer's Guide to the Solar System; and others. ...
Thegalaxyis surrounded by a huge hot-gas halo that is several hundreds of thousands of light-years in diameter. Astronomers estimate that the halo's mass is about the same as that of all the stars in the Milky Way. Many of the Milky Way's stars, however, are tough to view. That is...
The numbers are pretty astounding. NASA estimates the galaxyat 100,000 light-years across. Since one light year is about 9.5 x 1012km, so the diameter of the Milky Way galaxy is about 9.5 x 1017km in diameter. The thickness of the galaxy ranges depending on how close you are to the ...
Just over half-way through its five-year mission, Gaia's two telescopes have located a billion stars. That's still only one percent of the Milky Way's estimated stellar population, scattered over an area 100,000 light years in diameter. ...