Science, Solar System How is the temperature of the Sun’s surface measured through its much hotter atmosphere, the corona?
Science, Solar System I saw a program that showed the Moon revolving around Earth, causing the oceans to swell on both sides of the planet. Shouldn’t the ocean opposite the Moon be shallower than the side facing it?
Science, Stars How do we know what stars are behind dark nebulae (if they absorb the light from background stars)?
Science What are the motions of stars relative to each other in a globular or open cluster? Does the cluster move as a unit over time?
Stars Why do neutron stars have magnetism? Is the magnetism of a neutron star the same as a Child’s toy magnet? If a neutron star emits photons, where would they come from, and would they not experience the Zeeman effect? Why are neutron stars called stars?
