When Is an Asteroid Not an Asteroid?

When Is an Asteroid Not an Asteroid?
On March 29, 1807, German astronomer Heinrich Wilhelm Olbers spotted Vesta as a pinprick of light in the sky. Two hundred and four years later, as NASA's Dawn spacecraft prepares to begin orbiting this intriguing world.
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When Is An Asteroid Not An Asteroid
by Staff Writers Pasadena CA (JPL) Mar 30, 2011 On March 29, 1807, German astronomer Heinrich Wilhelm Olbers spotted Vesta as a pinprick of light in the sky.
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