Observing, The Moon If two Full Moons in one calendar month are called a Blue Moon, then what, if anything, are two New Moons called, as occurred in September?
Science We often hear that meteors are tiny — a speck of dust or, at most, a pebble — and that the size of a meteor trail is based on how big the particle is. But what about the speed of the object? And do certain materials cause more light than others?
Science Do gravitational waves exhibit similar traits to waves in the electromagnetic spectrum, such as wave-particle duality?
Telescopes and Equipment I’ve been thinking about buying a solar telescope, but I already have a 5-inch reflector. Is it possible to convert it into a solar scope? If so, what do I need, and how do I go about setting it up in a safe way?
Science Why does a gravitational lens sometimes create an Einstein Cross with four images and sometimes a circle?
