Watch highlights of Comet Siding Spring zoom past Mars and get roughly within 87,000 miles of the red planet — the closest any comet has gotten to it in a long, long time.
The livestream from the Slooh Community Observatory was hosted by expert astrobiologist David Grinspoon and featured special guests.
“We’re going to observe an event that happens maybe once every million years,” Jim Green, planetary science division director at NASA, said this month at a press conference. “This is an absolutely spectacular event.”
Siding Spring is estimated to be 4.6 billion years old with a core somewhere between half a mile and 5 miles wide. Looking the comet’s close brush with Mars could teach scientists a lot about the planet’s atmosphere, writes Mike Wall at Space.com. Studying the comet could also provide insight into how planets are formed: Siding Spring is believed to have been created in an area of our solar system between Jupiter and Neptune, but unlike most objects in that part of space at the time, it never was incorporated into a planet.
PHOTOS: 20 Breathtaking Images of Earth From Space
Aleppo, Syria, May 26, 2013 – The Citadel of Aleppo – medieval fortified palaceDigitalGlobe—Getty ImagesBelfast, Northern Ireland, Nov. 3, 2013 – “Wish,” a large-scale art workDigitalGlobe—Getty ImagesUtah, USA, April 22, 2013 – Colorado RiverDigitalGlobe—Getty ImagesCuanza River, Angola, April 28, 2013 – Cambambe DamDigitalGlobe—Getty ImagesDoha, Qatar, March 4, 2013 – Artificial island spanning nearly four million sq meters.DigitalGlobe—Getty ImagesDunalley, Australia, Jan. 6, 2013 – fires, false color image (red = healthy vegetation)DigitalGlobe—Getty ImagesAustralia, April 22, 2013 – Great Barrier ReefDigitalGlobe—Getty ImagesGwadar coast, Pakistan Sept. 29, 2013 – new island created by earthquake in PakistanDigitalGlobe—Getty ImagesCroatia, Feb. 16, 2013 – Galešnjak (Island of Love)DigitalGlobe—Getty ImagesHong Kong, China May 9, 2013 – giant rubber duckDigitalGlobe—Getty ImagesMadang Province, Papua New Guinea, March 22, 2013 – Manam VolcanoDigitalGlobe—Getty ImagesNamib Desert, Namibia, May 13, 2013 – Sossusvlie areaDigitalGlobe—Getty ImagesNaples, Italy, Feb. 19 2013 – Mount VesuviusDigitalGlobe—Getty ImagesNiger, Feb. 13, 2013 – Arlit Uranium MineDigitalGlobe—Getty ImagesSchooner Cays, Bahamas, May 26, 2013DigitalGlobe—Getty ImagesSochi, Russia, March 17, 2013 – Site of 2014 winter OlympicsDigitalGlobe—Getty ImagesNear the city of Sur, Oman, Feb. 13, 2013 – massive “green tide”DigitalGlobe—Getty ImagesValencia, Spain, July 19, 2013 – Palau de les Arts Reina Sofia and Gulliver Park with an enormous fiberglass model of Lemuel Gulliver trappedDigitalGlobe—Getty ImagesVersailles, France, Aug. 20, 2013 – Palace of VersaillesDigitalGlobe—Getty ImagesXi'an, China, Sept. 24, 2013 – Shiyuan Park DigitalGlobe—Getty Images
