Science – Astronomy Now

1 December 2020

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[ 30 November 2020 ] SOFIA opens a surprising window on quasars and galactic evolution News
[ 24 November 2020 ] Mars rover data indicates ancient megafloods across Gale Crater News
[ 22 November 2020 ] Radioactive elements may be key to exoplanet habitability News
[ 19 November 2020 ] Iconic Arecibo Observatory, too unsafe to repair, faces demolition News
[ 8 November 2020 ] Arecibo Observatory suffers additional damage from second cable failure News

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.