Science Why is one of the three filters in the Hubble palette ionized sulfur? Is Sulfur really that prevalent in the universe?
Science How can the Sun’s and Earth’s gravities provide a Lagrangian point on the side of Earth opposite the Sun? Don’t their combined gravities equal each other only at locations between the objects?
Exoplanets, Planets Why do aurorae appear strongest within rings centered on Earth’s poles instead of filled-in circles?
Exoplanets, Planets, Solar System What can astronomers tell us about the different colors on the surface of Jupiter’s moon Europa?
Exotic Objects Don’t black holes disobey the conservation of mass because black holes essentially “eat” matter, thus destroying the material?
