SOLAR SYSTEM

Detailed explanation-1: -Star Formation Stars are born within the clouds of dust and scattered throughout most galaxies. A familiar example of such as a dust cloud is the Orion Nebula. Turbulence deep within these clouds gives rise to knots with sufficient mass that the gas and dust can begin to collapse under its own gravitational attraction.

Detailed explanation-2: -Star-Forming Nebula These knots contain sufficient mass that the gas and dust can begin to collapse from gravitational attraction. As it collapses, pressure from gravity causes the material at the center to heat up, creating a protostar. One day, this core becomes hot enough to ignite fusion and a star is born.

Detailed explanation-3: -The correct response to the given question is option A: Stars vary greatly in temperature. The stars are celestial bodies with varying temperatures. Stars’ temperatures are determined by their size and the heat of the surface.

Detailed explanation-4: -STAGE 1: AN INTERSTELLAR CLOUD A very large interstellar cloud (spanning tens of parsecs) provides the initial stage of star formation. The cloud might contain thousands of times the Sun’s mass. The mass is dominately in the form of cold atomic and molecular gas, with some dust.

Detailed explanation-5: -1) The temperature and density increases. 2) Nuclear energy generation stars. 3) The gaseous sphere become self-luminous . 4) Dense sphere of hot gas is formed.

Detailed explanation-6: -STAGE 3: The T-Tauri Phase This early-stage lasts about 100 million years before nuclear fusion kicks in, and it becomes a true star. In this stage, a young star begins to produce strong winds, which push away the surrounding gas and molecules. This allows the forming star to become visible for the first time.