
What came first matter or energy?
Daniel and Kelly’s Extraordinary Universe
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What Is the Temperature of a Black Hole?
Gravity is what makes a star hot to begin with. It ignites the star, and then fusion keeps it hot. But if there was no fusion, it compressed into a black hole. That's the subject of another pocket. And so we have another question from megan, who's ten years old, who is a question about the moon. Why are ther craters on the moon? Like, look at the moon. By last count, there ware nine thousand, 137 recognized craters with names.
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