SOLAR SYSTEM

Detailed explanation-1: -A nebula is a giant cloud of dust and gas in space. Some nebulae (more than one nebula) come from the gas and dust thrown out by the explosion of a dying star, such as a supernova. Other nebulae are regions where new stars are beginning to form. For this reason, some nebulae are called “star nurseries."

Detailed explanation-2: -In some nebulae, stars form out of large clouds of gas and dust; once some stars have formed inside the cloud, their light illuminates the cloud, making it visible to us. These star formation regions are sites of emission and reflection nebulae, like the famous Orion Nebula shown in the picture on the right.

Detailed explanation-3: -The planetary nebula phase is a final stage in a low-mass star’s life. During this phase, the star sheds its outer layers. This creates an expanding, glowing shell of very hot gas. Despite the name, they have nothing to do with planets.

Detailed explanation-4: -Definitions of gaseous nebula. a cluster of stars within an intricate cloud of gas and dust. synonyms: diffuse nebula.

Detailed explanation-5: -Nebulae are often mind-bogglingly big, spanning several light years in size. The word ‘nebula’ used to have a much broader meaning, referring to any celestial object that appeared to have a diffuse structure, including the objects that we now know as galaxies.