This image shows comet Tempel 1 sixty seconds before it ran over NASA Deep Impact probe at 10:52 p.m. Pacific time, July 3 1:52 a.m. Eastern time, July 4., 2005.
Dwayne Brown, NASA public affairs officer, left, moderates a media briefing where panelist, seated from left, Jim Green, director, Planetary Science Division, NASA Headquarters, Washington, Carey Lisse, senior astrophysicist, Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland, Kelly Fast, program scientist, Planetary Science Division, NASA Headquarters, Washington, and Padma Yanamandra-Fisher, senior research scientist, Space Science Institute, Rancho Cucamonga Branch, California, outlined how space and Earth-based assets will be used to image and study comet Siding Spring during its Sunday, Oct. 19 flyby of Mars, Thursday, Oct. 9, 2014 at NASA Headquarters in Washington. (Photo credit: NASA/Joel Kowsky)
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 HiRISE camera on NASA Mars Reconnaissance Orbiter. The pattern suggests the comet rotates once every eight hours.
This artist concept shows NASA Mars orbiters lining up behind the Red Planet for their duck and cover maneuver to shield them from comet dust that may result from the close flyby of comet Siding Spring C/2013 A1 on Oct. 19, 2014.
S73-37273 (24 Dec. 1973) — An artist’s concept illustrating the trajectory of the newly-discovered Comet Kohoutek in relation to the sun and to Earth and the plane of Earth’s orbit. The picture show’s the position of Kohoutek on Christmas Eve, 1973. The Skylab space station in Earth orbit will provide a favorable location from which to observe the passing of the comet. Photo credit: NASA
This artist concept illustrates a comet being torn to shreds around a dead star, or white dwarf, called G29-38. NASA Spitzer Space Telescope observed a cloud of dust around this white dwarf that may have been generated from comet disruption.
A comparison of two radargrams from the SHARAD instrument on NASA Mars Reconnaissance Orbiter shows effects on the Martian ionosphere from the close passage of a comet.
This is a composite photo, assembled from separate images of Jupiter and comet Shoemaker-Levy 9, as imaged by the NASA/ESA Hubble Space Telescope in 1994.
This image, taken by NASA Deep Space 1 on September 22, 2001, has been enhanced to reveal dust being ejected from the nucleus of comet Borrelly. As a result, the nucleus is bright white in the image.
The solid nucleus of comet Borrelly is barely resolved in this image from NASA Deep Space 1, enhanced to reveal the highly collimated dust extending towards the bottom left corner of the picture.