Comments approved out by the Wide Field Infrared
Explorer to Survey (Wide-field Infrared Survey Explorer, or WISE, for its
acronym), NASA, have yielded the best on record count Today the population of
potentially hazardous asteroids in our solar system. Also known as
"PHAs" (acronym for Potentially Hazardous English Asteroids), these
asteroids have orbits within about eight million kilometers (five million
miles) from Earth's orbit and are large enough to survive passing through the
Earth's atmosphere and cause damage on a regional,
