Explore Mars In DepthScienceMarsArtist’s concept of comet...Mars HomeFactsMars ExplorationOverviewRover BasicsMars Exploration Science GoalsMission Timeline SummaryMars MissionsMars Sample ReturnMars Perseverance RoverMars Curiosity RoverMAVENMars Reconnaissance OrbiterMars OdysseyMars Relay NetworkMore Mars MissionsMultimediaImagesVideoAudioMore ResourcesNews & FeaturesLatest Mars ArticlesThe Mars ReportNewsletter HomeMoreThe Solar System Artist’s concept of comet Siding Spring (C/2013 A1)September 4, 2014 On Oct. 19, the comet will have a very close pass at Mars, just 82,000 miles (132,000 kilometers) from the planet. Downloads Original (1080×668) Mar 11, 2024 JPEG (257.21 KB)