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Many pulsars have periods that are gradually increasing as the spinning neutron stars lose energy.
Q16: Hypernovae are<br>A) supernovae that occur when two
Q18: A(n) _ is a solar-system object that
Q22: In an H-R diagram, stars with the
Q25: The free-fall contraction of a molecular cloud<br>A)
Q31: The Herschels' grindstone model of the Milky
Q33: Astronomers have found the center of the
Q49: Explain how we can find the age
Q54: How does density divide the stars in
Q86: _ occur about 130 km above Earth's
Q89: _ occurs when most of the material