Question

how is the life on the earth how human made?
how is the Milky Way so big how many black holes are .?
there in the planet is there any planet which have organisms .?answer my one question only​

Answer 1

Answer:

Ques:-How is the Milky way so big??

Ans:- 52,850 light years

Answer 2

Answer:

1- We know that life began at least 3.5 billion years ago, because that is the age of the oldest rocks with fossil evidence of life on earth. These rocks are rare because subsequent geologic processes have reshaped the surface of our planet, often destroying older rocks while making new ones.

2- So astronomers often use “light years” instead of kilometres to measure really big distances like the size of galaxies. A light year is the distance light would travel in a year. Light zips through space at 300 000 kilometres per second, so this makes the Milky Way just over 100 000 light years across. ten million black hole