Cold Comet Halley . ... VLT Project , European Southern Observatory Explanation: While this may not be the most esthetic image of Comet Halley that you have ever seen, it is likely the most unique. The tiny cluster of pixels circled is the famous comet along its orbit over 4 billion (4,000,000,000) kilometers or 28 AU from the Sun -- a record distance for a comet observation. ... NASA Web Site Statements, Warnings, and Disclaimers . NASA Official: Jay Norris. ...