Comet Siding Spring – Page 2

13 August 2026

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NASA Science Briefing: Comet Siding Spring at Mars

13 October 2014 Astronomy Now

NASA holds a news conference to discuss the close encounter of Comet Siding Spring with Mars. On October 19, 2014, the comet will pass 139,500 kilometers (88,000 miles) from the red planet.