NASA's Hubble Space Telescope has probed the bright core of Comet 17P/Holmes, which, to the delight of sky watchers, mysteriously brightened by nearly a millionfold in a 24-hour period beginning Oct. 23, 2007.
Comet 17P/Holmes is a periodic comet in our solar system.
On November 4, 2007, Comet 17P/Holmes was 1.62 Astronomical Units from the Earth, and 2.48 Astronomical Units from the Sun. Constellation: Perseus
Astronomers used Hubble's powerful resolution to study Comet Holmes' core for clues about how the comet brightened. The orbiting observatory's Wide Field Planetary Camera 2 (WFPC2) monitored the comet for several days, snapping images on Oct. 29, Oct. 31, and Nov. 4.