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Water on the Moon and Mars

It has long been known that water exists in comets, asteroids, on Mars and on the Moon, but the key question has always been, “how much is there?” Shadows in craters at the Moon’s poles have been suspected to hold some ice, but there was little hope of finding enough moisture across the rest of […]

Small Rocks

We know about the location of many large and medium sized asteroids, but we also know that we have not yet located all of the smaller rocks that may pose threats to life on Earth. Finding them is problematic and getting funding for the search is only the first step. The Tunguska explosion in Siberia […]

Kepler Space Telescope

The objective of the Kepler space telescope is to search for planetary systems outside of our solar system. It will be placed into a solar orbit that trails Earth, so it can scan distant light sources with no interference, but also easily relay data back to Earth for analysis. Kepler Spacecraft to Hunt Earth-Like Worlds […]

Asteroid Threat

The Threat to Earth from Asteroids & Comets Since it formed over 4.5 billion years ago, Earth has been hit many times by asteroids and comets whose orbits bring them into the inner solar system. These objects, collectively known as Near Earth Objects or NEOs, still pose a danger to Earth today. Depending on the […]

Solar Sails

Solar sails were first proposed by Kepler almost four hundred years ago. The idea of a solar sail is use a large expanse of a thin, light film to “catch” the pressure of photons in light and use that pressure to accelerate a space craft in a desired direction. Progress at NASA: A Brief History […]