Most solar companies set the price according to the solar system's wattage. A solar installation's “cost per watt” is a little like the “price per square foot” when you buy a house.

New research suggests that a binary pair of Kuiper Belt objects, known as the Altjira system, is actually made up of three separate bodies orbiting one another in a complex triad. This rare ...

Gregg, a Ph.D. candidate in physics and astronomy, developed a computer model to study our solar system, Alpha Centauri and the interstellar activity—the movement of gas, dust and other space ...