GK
THE UNIVERSE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
a stellular nebula
|
|
|
a black hole
|
|
|
a planetary nebula
|
|
|
a massive explosion
|
Detailed explanation-1: -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-2: -Most stars are born inside great clouds of gas and dust called nebulas. The process begins when a nebula starts to shrink, then divides into smaller, swirling clumps. Each clump becomes ball-shaped, and as it continues to shrink the material in it gets hotter and hotter.
Detailed explanation-3: -About 700 stars in different stages of their lives make their home in the nebula and over 150 protoplanetary disks have been found, as well.