New Horizons
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New Horizons image of Neptune and its largest moon, Triton, taken during the annual checkout in late June 2010. The image, taken when the planet was more than 2 billion miles from New Horizons, is a combination of two 9.967-second exposures. Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute
 
 
LORRI Image of Neptune & Triton
The top frame is a composite, full-frame (0.29° by 0.29°) LORRI image of Neptune taken Oct. 16, 2008, using an exposure time of 10 seconds and 4-by-4 pixel re-binning to achieve its highest possible sensitivity. The bottom frame is a twice-magnified view that more clearly shows the detection of Triton, Neptune’s largest moon. Neptune is the brightest object in the field and is saturated (on purpose) in this long exposure. Triton, which is about 16 arcsec east (celestial north is up, east is to the left) of Neptune, is approximately 180 times fainter. Scientists consider Triton to be one of the best analogs of Pluto in the solar system. All the other objects in the image are background field stars. The dark “tails” on the brightest objects are artifacts of the LORRI charge-coupled device (CCD); the effect is small but easily seen in this logarithmic intensity stretch. The original image was taken to test New Horizons’ optical navigation capabilities. Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute
 
 
New Horizons Detects Neptune's Moon Triton
This is a montage of New Horizons images of Jupiter and its volcanic moon Io, taken during the spacecraft's Jupiter flyby in early 2007. The Jupiter image is an infrared color composite taken by the spacecraft's near-infrared imaging spectrometer, the Linear Etalon Imaging Spectral Array (LEISA) at 01:40 UTC on Feb. 28, 2007. The image shows a major eruption in progress on Io's night side, at the northern volcano Tvashtar. Incandescent lava glows red beneath a 330-kilometer high volcanic plume, whose uppermost portions are illuminated by sunlight. The plume appears blue due to scattering of light by small particles in the plume. Credit: NASA/Johns Hopkins University Applied Physics Laboratory
 
 
Jupiter-Io Montage
New Horizons took this image of the icy moon Europa rising above Jupiter's cloud tops with its Long Range Reconnaissance Imager (LORRI) at 11:48 UTC on February 28, 2007, six hours after the spacecraft's closest approach to Jupiter. To provide a more dramatic perspective - the image has been rotated so south is at the top. Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute
 
 
Europa Rising
This color portrait of Jupiter's
 
 
Best Color Image of Jupiter's Little Red Spot
The LORRI image (left) shows fine details on Io's sunlit crescent and in the partially sunlit plume from the Tvashtar volcano, and reveals the bright nighttime glow of the hot lavas at the source of the Tvashtar plume. The MVIC image (top right) shows the contrasting colors of the red lava and blue plume at Tvashtar, and the sulfur and sulfur dioxide deposits on Io's sunlit surface. The LEISA image shows that the glow of the Tvashtar volcano is even more intense at infrared wavelengths and reveals the infrared glow of at least 10 fainter volcanic hot spots on the moon’s nightside. The brightest of these, Amirani/Maui, which is visible to the lower right of Tvashtar, is less than 4% as bright as Tvashtar. Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute
 
 
Io Through Different 'Eyes'
An image showing the Jupiter planetary/moon system. Credit: NASA/JHUAPL
 
 
Family Portrait
New Horizons found evidence of a new eruption taking place on Io in this image. Credit: NASA/JHUAPL
 
 
Io New Eruption
This image of Io, one of Jupiter's moons, shows the surface changes seen by New Horizons when compared with the surface of Io seen by the Galileo spacecraft in 1999. Credit: NASA/JHUAPL
 
 
Io Surface Changes
Image of the planet Jupiter's moon, Io, as seen by the New Horizons spacecraft. A plume from a huge volcanic eruption can be seen at the north pole of the moon. Credit: NASA/JHUAPL
 
 
Io Eruption
The New Horizons Long Range Reconnaissance Imager (LORRI) captured these two images of Jupiter's outermost large moon, Callisto, as the spacecraft flew past Jupiter in late February. New Horizons' closest approach distance to Jupiter was 2.3 million kilometers (1.4 million miles), not far outside Callisto's orbit, which has a radius of 1.9 million kilometers (1.2 million miles). The left image, taken at 05:03 Universal Time on February 27, 2007, is centered at 5 degrees south, 5 degrees west, and has a solar phase angle of 46 degrees. The right image was taken at 03:25 Universal Time on February 28, 2007. It is centered at 4 degrees south, 356 degrees west, and has a solar phase angle of 76 degrees. Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute
 
 
Capturing Callisto
Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute
 
 
Two Moons Meet over Jupiter
This image of a plume erupting from Tvashtar, a volcano on Io was taken by the Long Range Reconnaissance Imager (LORRI) on New Horizons at 11:04 Universal Time on February 28, 2007. Five hours after the spacecraft's closest approach to Jupiter, the picture was taken from a distance of 2.5 million kilometres. Credits: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute
 
 
Tvashtar
The image on the left is an altitude map made by assigning the color red to 1.60 microns, green to 1.89 microns and blue to 2.04 microns. Because Jupiter's atmosphere absorbs light strongly at 2.04 microns, only clouds at very high altitude will reflect light at this wavelength. Light at 1.89 microns can go deeper in the atmosphere and light at 1.6 microns can go deeper still. In this map, bluish colors indicate high clouds and reddish colors indicate lower clouds. This picture shows, for example, that the Great Red Spot extends far up into the atmosphere. In the image at right, red equals 1.28 microns, green equals 1.30 microns and blue equals 1.36 microns, a range of wavelengths that similarly probes different altitudes in the atmosphere. This choice of wavelengths highlights Jupiter's high-altitude south polar hood of haze. The edge of Jupiter's disk at the bottom of the panel appears slightly non-circular because the left-hand portion is the true edge of the disk, while the right portion is defined by the day/night boundary (known as the terminator). Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute
 
 
Storm spectra
New Horizons captured this unique view of Jupiter's moon Io with its color camera - the Multispectral Visible Imaging Camera (MVIC) - at 00:25 UT on March 1, 2007, from a range of 2.3 million kilometers (1.4 million miles). Image Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute
 
 
A burst of color
Image Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute
 
 
LORRI takes an even closer look at the Little Red Spot
The Long Range Reconnaissance Imager (LORRI) on New Horizons captured this picture of Jupiter's moon Io, 19 hours after the spacecraft's closest approach to Jupiter. The continuing eruption at the volcano Tvashtar produces an enormous plume roughly 330 kilometers (200 miles) high, which is illuminated both by sunlight and
 
 
A Midnight Plume
This is a mosaic of three New Horizons images of Jupiter's Little Red Spot, taken with the spacecraft's Long Range Reconnaissance Imager (LORRI) camera at 17:41 Universal Time on February 26 from a range of 3.5 million kilometers (2.1 million miles). The image scale is 17 kilometers (11 miles) per pixel, and the area covered measures 33,000 kilometers (20,000 miles) from top to bottom, two and one-half times the diameter of Earth. The Little Red Spot, a smaller cousin of the famous Great Red Spot, formed in the past decade from the merger of three smaller Jovian storms, and is now the second-largest storm on Jupiter. About a year ago its color, formerly white, changed to a reddish shade similar to the Great Red Spot, perhaps because it is now powerful enough to dredge up reddish material from deeper inside Jupiter. These are the most detailed images ever taken of the Little Red Spot since its formation, and will be combined with even sharper images taken by New Horizons 10 hours later to map circulation patterns around and within the storm. LORRI took the images as the Sun was about to set on the Little Red Spot. The LORRI camera was designed to look at Pluto, where sunlight is much fainter than it is at Jupiter, so the images would have been overexposed if LORRI had looked at the storm when it was illuminated by the noonday Sun. The dim evening illumination helped the LORRI camera obtain well-exposed images. The New Horizons team used predictions made by amateur astronomers in 2006, based on their observations of the motion of the Little Red Spot with backyard telescopes, to help them accurately point LORRI at the storm. Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute
 
 
The Little Red Spot: Closest View Yet
This is New Horizons' best image of Ganymede, Jupiter's largest moon, taken with the spacecraft's Long Range Reconnaissance Imager (LORRI) camera at 10:01 Universal Time on February 27 from a range of 3.5 million kilometers (2.2 million miles). The longitude of the disk center is 38 degrees West and the image scale is 17 kilometers (11 miles) per pixel. Dark patches of ancient terrain are broken up by swaths of brighter, younger material, and the entire icy surface is peppered by more recent impact craters that have splashed fresh, bright ice across the surface. Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute
 
 
Ganymede
This image of Jupiter's icy moon Europa, the first Europa image returned by New Horizons, was taken with the spacecraft's Long Range Reconnaissance Imager (LORRI) camera at 07:19 Universal Time on February 27, from a range of 3.1 million kilometers (1.9 million miles). The longitude of the disk center is 307 degrees West and the image scale is 15 kilometers (9 miles) per pixel. This is one of a series of images designed to look for landforms near Europa's terminator - the line dividing day and night - where low Sun angles highlight subtle topographic features. Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute
 
 
Europa
The first images returned to Earth by New Horizons during its close encounter with Jupiter feature the Galilean moon Io, snapped with the Long Range Reconnaissance Imager (LORRI) at 0840 UTC on February 26, while the moon was 2.5 million miles (4 million kilometers) from the spacecraft. The left image is a shorter exposure - 3 milliseconds - designed to look at surface features. In this frame, the Tvashtar volcano shows as a dark spot, also at 11 o'clock, surrounded by a large dark ring, where an area larger than Texas has been covered by fallout from the giant eruption. Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute
 
 
An Eruption on Io
This image was taken on Jan. 8, 2007, with the New Horizons Long Range Reconnaissance Imager (LORRI), while the spacecraft was about 81 million kilometers (about 50 million miles) from Jupiter. Jupiter's volcanic moon Io is to the right; the planet's Great Red Spot is also visible. The image was one of 11 taken during the Jan. 8 approach sequence, which signaled the opening of the New Horizons Jupiter encounter. Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute
 
 
Jupiter - Io on Approach
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