GENERAL KNOWLEDGE

Detailed explanation-1: -Scientists have begun tallying those clumps of matter and the resulting numbers are pretty wild. Our home galaxy, the Milky Way, contains at least 100 billion stars, and the observable universe contains at least 100 billion galaxies.

Detailed explanation-2: -One such estimate says that there are between 100 and 200 billion galaxies in the observable universe.

Detailed explanation-3: -By multiplying this number by the number of times this tiny patch of sky would fit into the entire sky, astronomers came up with an estimate of between about 100 and 200 billion galaxies.

Detailed explanation-4: -While estimates among different experts vary, an acceptable range is between 100 billion and 200 billion galaxies, said Mario Livio, an astrophysicist at the Space Telescope Science Institute in Baltimore, Maryland.