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?
