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What do we mean when we say that a particle is a weakly interacting particle?
Q14: Why do the predicted consequences of the
Q19: There is no upper limit to the
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Q31: Why does the value of Hubble's constant
Q32: Some galaxy clusters are still growing today.
Q34: Which of statement below about black holes
Q56: What do we mean by dimension in
Q72: Briefly describe how we can use the
Q76: Why are Cepheid variables important?<br>A)Cepheid variables are
Q110: Which bright star (lowercase letters)is Aldebaran?<br>