Exotic Objects Is there a quasar behind every black hole, and a black hole behind every quasar? Are these different faces of the same object?
Science In the Northern Hemisphere, the summer solstice happens on or around June 21. Yet the summer is usually hottest the first week of August. The opposite is true for the winter solstice. Why the delay?
Exoplanets, Planets Ask Astro: How do scientists determine the chemical compositions of the planets and stars?
The Sun Whenever I read articles about solar storms, they talk about billions of tons of charged particles that are ejected. How are these amounts calculated?
