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  • Comet Hale-Bopp Home Page at NASA GSFC NSSDC - The nucleus of Hale-Bopp is estimated to be about 30 to 40 km across - Comet Halley's nucleus was estimated at 8 x 8 x 16 km. The nucleus is exhibiting sudden brief eruptions and a complex mottled surface. Its absolute magnitude of -1 makes it one of the brightest comets to reach the inner solar system in history.

  • Hale-Bopp Web Page, The Great Comet of 1997 - This page focuses on the discovery and observation of the unusually bright Hale-Bopp comet which came within 1.315 AU of Earth in March 1997. With over 5,100 images, this site has the largest collection of Comet Hale-Bopp images in the world available on the Internet. [NASA Jet Propulsion Laboratory]

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