ESS
Grade-9
Easy
Question
Nova is a ____________.
- Nuclear explosion triggered by the growth of hydrogen on the surface of a white dwarf star.
- A highly magnetic, rotating star that emits a ray of radiation.
- A star-like body that may transmit radio waves and other kinds of energy.
- Supernova
Hint:
It is also the name given to a star that beams with sudden and increasing brightness after exploding with a burst of energy. Origin: Nova is from the Latin word novus, which means new.
The correct answer is: Nuclear explosion triggered by the growth of hydrogen on the surface of a white dwarf star.
- When the hydrogen reaches the surface of the incredibly hot white dwarf, it rapidly ignites, creating a large nuclear explosion on the surface of the star. This is what we see in our sky as a nova.
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