Fortunately, much of that is produced by nuclear reactions in stars, and such stellar neutrinos have relatively low energies.
所幸的是，相当数量的中微子都是恒星内部核反应产生的，而这些星球上的中微子质量都相对较小。
These signals are produced by colliding stars or nuclear reactions in outer space.
这些讯号是由外层空间的星球碰撞或者核反应所造成的。
They give concrete evidence that nuclear reactions are proceeding in stars.
它们给出了恒星内正在不断进行的核反应的确实证据。
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