Question 1436Navigation General70% to pass
A star that suddenly becomes several magnitudes brighter and then gradually fades is a _______________.
AI Explanation
The correct answer is C) nova.
A nova is a star that suddenly becomes several magnitudes brighter and then gradually fades over time. This sudden increase in brightness is caused by a thermonuclear explosion on the surface of a white dwarf star, which is part of a binary star system. The other answer choices are incorrect:
A) double star - A double star is two stars that appear close together in the sky, but are not necessarily related.
B) variable star - A variable star is a star that fluctuates in brightness over time, but not as dramatically as a nova.
D) nebula - A nebula is a cloud of gas and dust in space, not a type of variable star.
Related Questions
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