GENERAL KNOWLEDGE

Detailed explanation-1: -Most nebulae are of vast size; some are hundreds of light years in diameter. A nebula that is barely visible to the human eye from Earth would appear larger, but no brighter, from close by.

Detailed explanation-2: -Mostly the stuff of the cloud was simple atoms of hydrogen and helium, but it was peppered here and there by more complicated elements forged in the internal furnaces and death explosions of older stars. Even as a new sun took shape at the center of the cloud, disturbances formed farther out.

Detailed explanation-3: -The Sun and the planets formed together, 4.6 billion years ago, from a cloud of gas and dust called the solar nebula.