Science If our Sun is a typical star, and if most stars are surrounded by Oort clouds, why do these clouds not obscure our view of other stars?
Science Is the Moon’s rotation rate still slowing down? If so, will there come a time when the currently unseen 41 percent will be visible from Earth?
Cosmology If gravitational waves come from two massive objects orbiting each other, then does the Earth-Moon system create gravitational waves? What frequency would they have?
Exoplanets, Planets, Solar System How can astronomers be sure that Pluto is larger than Eris? Could we get a different number for Eris’ size once it’s visited by a spacecraft?
Exoplanets, Planets, Solar System Why haven’t we sent a microphone to Mars, or any other planet for that matter?
Cosmology What if there were two gravitational wave sources coming from different directions? Would there be an interference pattern?
