GENERAL KNOWLEDGE

GK

THE UNIVERSE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A characteristic of a nebula is that it-
A
is at the center of the solar system.
B
is a region where stars are born.
C
forms halfway through a star’s life cycle.
D
has the coolest temperature in space.
Explanation: 

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: -STAR BIRTHS are started when the interstellar matter in gas clouds, such as the Eagle Nebula shown here, compresses and fuses. Irregularities in the density of the gas causes a net gravitational force that pulls the gas molecules closer together.

Detailed explanation-3: -Nebulae are interstellar clouds made up of tiny particles often illuminated by starlight. Their unique shapes, varied as earthly clouds, are created by the collapse of matter into a new star, or the explosion of a star becoming a supernova.

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