UNIVERSE
SOLAR STRUCTURE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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100 light years
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1000 light years
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10, 000 light years
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100, 000 light year
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Detailed explanation-1: -Our galaxy probably contains 100 to 400 billion stars, and is about 100, 000 light-years across. That sounds huge, and it is, at least until we start comparing it to other galaxies. Our neighboring Andromeda galaxy, for example, is some 220, 000 light-years wide.
Detailed explanation-2: -Recent research has doubled the Milky Way’s span to perhaps 200, 000 light-years, showing that while the population of stars grows less dense in our galaxy’s outer rim, a gauzy scattering stretches well past what scientists had previously observed.
Detailed explanation-3: -The galaxy we live in, called the Milky Way Galaxy, is a barred spiral galaxy composed of at least 100 billion stars. It is approximately 100, 000 light years across and about 1000 light years thick. It has a central bulge that is about 10, 000 light years in diameter.
Detailed explanation-4: -For most space objects, we use light-years to describe their distance. A light-year is the distance light travels in one Earth year. One light-year is about 6 trillion miles (9 trillion km). That is a 6 with 12 zeros behind it!