Examlex
What is the origin of the rings of gas that surround Supernova 1987A?
Q95: In order to measure the speed of
Q110: In what way is the general theory
Q146: The first pulsar was discovered in which
Q167: What are the typical dimensions of a
Q168: The Local Supercluster of galaxies is also
Q192: An astronomer studying a galaxy finds that
Q247: What result might you expect in a
Q266: Which component of the Milky Way Galaxy
Q272: The significant feature of a Cepheid variable
Q348: What useful purpose did variable stars serve