Mystery missile an optical illusion?

At least one expert claims that the mystery missile launch off the California coast on was merely an optical illusion. Key quote:

John Pike of the security analyst group globalsecurity.org said the video shot by a news helicopter owned by KCBS is an optical illusion. Pike said the video is of an airplane heading toward the camera and the contrail is illuminated by the setting sun. He said the object can’t be a rocket because it appeared to alter its course.

An Early Warning System for Asteroid Impact

In a paper posted tonight on the Los Alamos astro-ph website, an astronomer is proposing an early warning system for asteroid impact. Key quote from the abstract:

This system, dubbed “Asteroid Terrestrial-impact Last Alert System” (ATLAS), comprises two observatories separated by about 100km that simultaneously scan the visible sky twice a night, and can be implemented immediately for relatively low cost. The sensitivity of ATLAS permits detection of 140m asteroids (100 Mton impact energy) three weeks before impact, and 50m asteroids a week before arrival. An ATLAS alarm, augmented by other observations, should result in a determination of impact location and time that is accurate to a few kilometers and a few seconds.

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