I combine in reactions, my weight is significant, and I define the structure of a star. What am I?
Category: Science · Difficulty: hard
Hint: Consider the simplest and most abundant element in the universe.
Answer
A hydrogen atom
Explanation
A hydrogen atom is the lightest and most abundant element, playing a crucial role in the formation of stars and the universe's structure.
This is a hard science riddle — a tricky one that takes a little thought. The answer is A hydrogen atom.
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