SOLAR SYSTEM

UNIVERSE

THE SUN

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the first phase of a star?
A
Horsehead Nebula
B
Eagle Nebula
C
Stellar Nebula
D
Average Star
Explanation: 

Detailed explanation-1: -Over time, the hydrogen gas in the nebula is pulled together by gravity and it begins to spin. As the gas spins faster, it heats up and becomes as a protostar .

Detailed explanation-2: -As the cloud collapses, the material at the center begins to heat up. Known as a protostar, it is this hot core at the heart of the collapsing cloud that will one day become a star.

Detailed explanation-3: -Credit: HST/NASA. 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: -Stars ultimately begin with a nebula. A nebula is a giant cloud of gas and dust. The hydrogen in the nebula gets pulled together by gravity and it starts to spin. As the gas spins, it becomes a protostar.

There is 1 question to complete.