Physics Question of the week
Why are astronomers interested in X-rays? [219 votes total]

X-rays are produced by proton-antiproton anniliation in space (24)
 11%
It would show evidence of neutrinos passing through the earth (21)
 10%
It would be the signature of the "big Bang" (52)
 24%
Black holes can be found by looking for X-ray emissions (122)
 56%


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