EVERYDAY SCIENCE

SCIENCE

EARTH SCIENCE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is a large cloud of gas and dust where stars are born or explode at the end of their lives?
A
nebula
B
black hole
C
quasar
D
pulsar
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: -Approximately 4.6 billion years ago, the solar system was a cloud of dust and gas known as a solar nebula. Gravity collapsed the material in on itself as it began to spin, forming the sun in the center of the nebula.

Detailed explanation-3: -These clouds are called nebulae. A typical nebula is many light-years across and contains enough mass to make several thousand stars the size of our sun.

Detailed explanation-4: -A nebula (’cloud’ or ‘fog’ in Latin; pl. nebulae, nebulæ or nebulas) is a distinct luminescent part of interstellar medium, which can consist of ionized, neutral or molecular hydrogen and also cosmic dust. Nebulae are often star-forming regions, such as in the “Pillars of Creation” in the Eagle Nebula.

Detailed explanation-5: -The Horsehead Nebula in Orion is probably the most famous example of a dark nebula. It is a dark region of dust in the shape of a horse’s head that blocks the light from a much larger emission nebula behind it.

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