SOLAR SYSTEM

Detailed explanation-1: -Nebula – • The most abundant element in the universe is hydrogen. The Crab Nebula is a supernova remnant, all that remains of a tremendous stellar explosion. Observers in China and Japan recorded the supernova nearly 1, 000 years ago, in 1054.

Detailed explanation-2: -Hydrogen is a clean alternative to methane, also known as natural gas. It’s the most abundant chemical element, estimated to contribute 75% of the mass of the universe.

Detailed explanation-3: -About 4.6 billion years ago our solar system formed from a cloud of gas and dust which slowly contracted under the mutual gravity of all of its particles. The cloud was made largely of hydrogen (H) with some helium (He) and small amounts of the remaining naturally occurring chemical elements.

Detailed explanation-4: -By examining the spectra of nebulae, astronomers infer their chemical content. Most emission nebulae are about 90% hydrogen, with the remaining helium, oxygen, nitrogen, and other elements.

Detailed explanation-5: -Most Diffuse nebula contain mostly hydrogen with smaller amounts of helium, oxygen, sulfur, and other heavier elements. Eventually, when the stars born from the nebula progress, their solar wind will blow away the nebula into space leaving almost nothing but an open cluster of stars.