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Q13: What is Cygnus X-1?<br>A) The brightest star
Q20: Neutron stars have<br>A) very strong bi-polar magnetic
Q27: Which method relies on the mass of
Q38: State the cosmological principle.
Q43: In a spectroscopic binary, if a pair
Q60: In comparing first magnitude Deneb with second
Q66: Energy produced in the solar core is
Q71: If something falls into a black hole,
Q74: Hydrogen is the major gas in the
Q85: Neptune's moon Triton appears to have a