Tag Archives: Planetary Science Institute

NASA Survey Counts Potentially Hazardous Asteroids – NASA Jet Propulsion Laboratory

August 4, 2013 – Potential Hazardous Asteroids (PHAs) More Numberous than Previously Thought: Potentially hazardous asteroids, or PHAs, are a subset of the larger group of near-Earth asteroids. Findings indicate there are roughly 4,700 PHAs, plus or minus 1,500, with diameters … Continue reading

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The Enduring Mystery of the Centaurs.

July 26, 2013 – The Enduring Mystery of the Centaurs: The true identity of centaurs, the small celestial bodies orbiting the sun between Jupiter and Neptune, is one of the enduring mysteries of astrophysics. Are they asteroids or comets? A … Continue reading

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