Regulus, the brightest star in the constellation Leo. It is also called Alpha Leonis and Cor Leonis. Regulus has a magnitude of 1.36 and is about 84 light-years distant from the earth. In 1959 the planet Venus passed between Regulus and the earth, giving astronomers a rare opportunity to study the upper atmosphere of Venus by observing changes in the light of Regulus as it went into and out of eclipse.
A lunar land rush is the most likely thing in the world (or, rather, out of it). As private companies gaze spaceward with dollar signs in their eyes, it's time to start settling some questions about space ownership, use and management.
A single pulsar is fascinating enough, but as a set, these rapidly rotating neutron stars help scientists figure out mysteries of the universe.