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Comets: Siding Spring (C/2013 A1)

Comet Siding Spring Image Gallery

Siding Spring Images

  • Close Siding Spring Encounter
  • Mars-Orbiting Spectrometer Shows Dusty Comet's Spectrum
  • Ionized Metal in Mars' Atmosphere After Comet Flyby
  • Mars Orbiter Sizes Up Passing Comet
  • Brightness Rhythm of Comet Is Clue to Rotation Rate
  • Radar Sees Effect of Comet Flyby on Mars' Ionosphere
  • Mars' Mid-Latitude Ionospheric Effects of Comet Flyby
  • Radar-Detected Change in Mars' Near-Polar Ionosphere
  • Metals from Comet Dust Detected in Mars Atmosphere
  • Comet Put Magnesium and Iron into Martian Atmosphere
  • Mars Curiosity Rover Views Comet Siding Spring
  • Mars-Orbiting Spectrometer's Images Show Comet's Coma
  • View of Comet Siding Spring and Mars from Hubble
  • First Resolved Image of a Long-Period Comet's Nucleus
  • Mars Rover View of Comet (Blink of Two Exposures)
  • Opportunity's View of Passing Comet (Short Exposure)
  • Opportunity's View of Passing Comet (Short Exposure - Labeled)
  • Mars Rover Opportunity's View of Passing Comet
  • Mars Rover Opportunity's View of Passing Comet (Labeled)
  • NASA's Mars Orbiters Maneuvers as Comet Siding Spring Approaching Mars
  • NASA Assets Observing Comet Siding Spring
  • View of Comet Siding Spring from Southern Hemisphere
  • Mars Orbiters 'Duck and Cover' for Comet Siding Spring Encounter
  • Comet Siding Springs' Distance From Mars
  • Comet Siding Spring Planned Science Observations by Mars Spacecraft
  • Artist's concept of comet Siding Spring (C/2013 A1)
  • NEOWISE Checks on Comet C/2013 A1 Siding Spring
  • Hubble Image of Comet Siding Spring
  • NEOWISE Spies Comet C/2013 A1 Siding Spring
  • Comet Siding Spring C/2013 A1
  • A Comet Heads for Mars
Close Siding Spring Encounter Mars-Orbiting Spectrometer Shows Dusty Comet's Spectrum Ionized Metal in Mars' Atmosphere After Comet Flyby Mars Orbiter Sizes Up Passing Comet Brightness Rhythm of Comet Is Clue to Rotation Rate Radar Sees Effect of Comet Flyby on Mars' Ionosphere Mars' Mid-Latitude Ionospheric Effects of Comet Flyby Radar-Detected Change in Mars' Near-Polar Ionosphere Metals from Comet Dust Detected in Mars Atmosphere Comet Put Magnesium and Iron into Martian Atmosphere Mars Curiosity Rover Views Comet Siding Spring Mars-Orbiting Spectrometer's Images Show Comet's Coma View of Comet Siding Spring and Mars from Hubble First Resolved Image of a Long-Period Comet's Nucleus Mars Rover View of Comet (Blink of Two Exposures) Opportunity's View of Passing Comet (Short Exposure) Opportunity's View of Passing Comet (Short Exposure - Labeled) Mars Rover Opportunity's View of Passing Comet Mars Rover Opportunity's View of Passing Comet (Labeled) NASA's Mars Orbiters Maneuvers as Comet Siding Spring Approaching Mars NASA Assets Observing Comet Siding Spring View of Comet Siding Spring from Southern Hemisphere Mars Orbiters 'Duck and Cover' for Comet Siding Spring Encounter Comet Siding Springs' Distance From Mars Comet Siding Spring Planned Science Observations by Mars Spacecraft Artist's concept of comet Siding Spring (C/2013 A1) NEOWISE Checks on Comet C/2013 A1 Siding Spring Hubble Image of Comet Siding Spring NEOWISE Spies Comet C/2013 A1 Siding Spring Comet Siding Spring C/2013 A1 A Comet Heads for Mars

Siding Spring: Press Release Images


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The close encounter between comet Siding Spring and Mars flooded the planet with an invisible tide of charged particles from the comet's coma. The dense inner coma reached the surface of the planet, or nearly so. The comet's powerful magnetic field temporarily merged with, and overwhelmed, the planet's weak field, as shown in this artist's depiction.
Close Siding Spring Encounter
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The Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) aboard NASA's Mars Reconnaissance Orbiter obtained this spectrum for comet C/2013 A1 Siding Spring during the comet's close approach to Mars.
Mars-Orbiting Spectrometer Shows Dusty Comet's Spectrum
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This graphic depicts what Mars' atmosphere would have looked like to a viewer with ultraviolet-seeing eyes after a meteor shower on Oct. 19, 2014. It combines an image from the Imaging Ultraviolet Spectrograph on NASA's MAVEN spacecraft with an illustration of how the atmosphere lies over Mars.
Emission from Ionized Magnesium in Mars' Atmosphere After Comet Flyby
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Five images of comet Siding Spring taken within a 35-minute period as it passed near Mars on Oct. 19, 2014, provide information about the size of the comet's nucleus. The images were acquired by the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter.
Mars Orbiter Sizes Up Passing Comet
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This graph shows changes in apparent brightness of comet C/2013 A1 Siding Spring as it approached and receded from Mars, as seen by the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter. The pattern suggests the comet rotates once every eight hours.
Brightness Rhythm of Mars Flyby Comet Is Clue to Rotation Rate
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A comparison of two radargrams from the SHARAD instrument on NASA's Mars Reconnaissance Orbiter shows effects on the Martian ionosphere from the close passage of a comet.
Radar Indication of Effect of Comet Flyby on Martian Ionosphere
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These plots portray data from radar sounding of Mars' mid-latitude ionosphere at three times on Oct. 19 and 20, 2014. The middle one shows effects of dust from a comet that passed near Mars that day. The data are from the MARSIS instrument on the European Space Agency's Mars Express orbiter.
Change in Mars' Mid-Latitude Ionosphere After Comet Flyby
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These spectrograms from the MARSIS instrument on the European Space Agency's Mars Express orbiter show the intensity of radar echo in Mars' far-northern ionosphere at three times on Oct. 19 and 20, 2014. The middle plot reveals effects attributed to dust from a comet that passed near Mars that day.
Radar-Detected Change in Martian Near-Polar Ionosphere After Comet's Flyby
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These eight graphs present data from the Neutral Gas and Ion Mass Spectrometer on NASA's MAVEN orbiter identifying ions of different metals added to the Martian atmosphere shortly after comet C/2013 A1 Siding Spring sped close to Mars. Dust particles from the comet delivered the metals to Mars.
Ions of Eight Metals from Comet Dust Detected in Mars Atmosphere
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The places where the red line on this graph extends higher than the blue line show detection of metals added to the Martian atmosphere from dust particles released by a passing comet on Oct. 19, 2014. The graphed data are from the Imaging Ultraviolet Spectrograph (IUVS) on NASA's MAVEN spacecraft.
Comet Meteor Shower Put Magnesium and Iron into Martian Atmosphere
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This animation and still image of comet C/2013 A1 Siding Spring were taken by the Mast Camera (Mastcam) on NASA's Curiosity Mars rover as the comet passed near the red planet on Oct. 19, 2014.
Mars Curiosity Rover Views Comet Siding Spring
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These two infrared images of comet C/2013 A1 Siding Spring were taken by the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) aboard NASA's Mars Reconnaissance Orbiter on Oct. 19, 2014. This Oort Cloud comet was making its first voyage through the inner solar system.
Images From Mars-Orbiting Spectrometer Show Comet's Coma
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This image shows a star field with Mars as a small orange ball on the right and above it a bright comet in white with a tail.
View of Comet Siding Spring and Mars from Hubble
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These images were taken of comet C/2013 A1 Siding Spring by NASA's Mars Reconnaissance Orbiter on Oct. 19, 2014, during the comet's close flyby of Mars and the spacecraft.
First Resolved Image of a Long-Period Comet's Nucleus
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This two-image blink shows a comparison of two exposure times in images from the panoramic camera (Pancam) on NASA's Mars Exploration Rover Opportunity showing comet C/2013 A1 Siding Spring as it flew near Mars on Oct. 19, 2014.
Mars Rover Opportunity's View of Comet (Blink of Two Exposures)
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Researchers used the panoramic camera (Pancam) on NASA's Mars Exploration Rover Opportunity to capture this 10-second-exposure view of comet C/2013 A1 Siding Spring as it passed near Mars on Oct. 19, 2014.
Mars Rover Opportunity's View of Passing Comet (Short Exposure)
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Researchers used the panoramic camera (Pancam) on NASA's Mars Exploration Rover Opportunity to capture this 10-second-exposure view of comet C/2013 A1 Siding Spring as it passed near Mars on Oct. 19, 2014.
Mars Rover Opportunity's View of Passing Comet (Short Exposure)
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Researchers used the panoramic camera (Pancam) on NASA's Mars Exploration Rover Opportunity to capture this view of comet C/2013 A1 Siding Spring as it passed near Mars on Oct. 19, 2014.
Mars Rover Opportunity's View of Passing Comet
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Researchers used the panoramic camera (Pancam) on NASA's Mars Exploration Rover Opportunity to capture this view of comet C/2013 A1 Siding Spring as it passed near Mars on Oct. 19, 2014.
Mars Rover Opportunity's View of Passing Comet
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Artist's concept of Comet Siding Spring approaching Mars, shown with NASA's orbiters preparing to make science observations of this unique encounter.
NASA's Mars Orbiters Maneuvers as Comet Siding Spring Approaching Mars
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NASA's extensive fleet of science assets, particularly those orbiting and roving Mars, have front row seats to image and study a once-in-a-lifetime comet flyby on Sunday, Oct. 19, 2014.
NASA Assets Observing Comet Siding Spring
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This image shows a star field with Mars up at the top, the constellation Scorpius running beneath it and to the left a little bit and the constellation Saturn Libra beneath Scorpius.
View of Comet Siding Spring from Southern Hemisphere
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This graphic shows Mars in the middle with a blue line running from top to bottom of the planet representing the comets flight path. The comet and coma intersect that line at the top of Mars. Three Mars orbiters are hiding behind the planet, away from the comet coma and particles. An orange line/arrow crosses from right to left showing the direction of Mars.
Mars Orbiters 'Duck and Cover' for Comet Siding Spring Encounter
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This graph shows Earth and Earth's moon with a blue line in the middle showing Comet Siding Spring and how close it would come to Earth if Mars were Earth.
Comet Siding Springs' Distance From Mars
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This graphic shows the science observations that may be captured by NASA Mars spacecraft during the close encounter with Comet Siding Spring (C/2013 A1).
Comet Siding Spring Planned Science Observations by Mars Spacecraft
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