NASA's New Horizons Detects Surface Features, Possible Polar Cap on Pluto
May 14, 2015
For the first time, images from NASA’s New Horizons spacecraft are revealing bright and dark regions on the surface of faraway Pluto — the primary target of the New Horizons close flyby in mid-July.
The images were captured in early to mid-April from within 113 million kilometers (70 million miles), using the telescopic Long-Range Reconnaissance Imager (LORRI) camera on New Horizons. A technique called image deconvolution sharpens the raw, unprocessed images beamed back to Earth. New Horizons scientists interpreted the data to reveal the dwarf planet has broad surface markings — some bright, some dark — including a bright area at one pole that may be a polar cap.
“As we approach the Pluto system we are starting to see intriguing features such as a bright region near Pluto’s visible pole, starting the great scientific adventure to understand this enigmatic celestial object,” says John Grunsfeld, associate administrator for NASA’s Science Mission Directorate in Washington. “As we get closer, the excitement is building in our quest to unravel the mysteries of Pluto using data from New Horizons.”
Also captured in the images is Pluto’s largest moon, Charon, rotating in its 6.4-day-long orbit. The exposure times used to create this image set — a tenth of a second — were too short for the camera to detect Pluto’s four much smaller and fainter moons.
Since it was discovered in 1930, Pluto has remained an enigma. It orbits our Sun about 5 billion kilometers (more than 3 billion miles) from Earth, and researchers have struggled to discern any details about its surface. These latest New Horizons images allow the mission science team to detect clear differences in brightness across Pluto’s surface as it rotates.
“After traveling more than nine years through space, it’s stunning to see Pluto, literally a dot of light as seen from Earth, becoming a real place right before our eyes,” said Alan Stern, New Horizons principal investigator at Southwest Research Institute (SwRI) in Boulder, Colorado. “These incredible images are the first in which we can begin to see detail on Pluto, and they are already showing us that Pluto has a complex surface.”
The images the spacecraft returns will dramatically improve as New Horizons speeds closer to its July rendezvous with Pluto.
“We can only imagine what surprises will be revealed when New Horizons passes approximately 12,500 kilometers (7,800 miles) above Pluto’s surface this summer,” said Hal Weaver, the mission’s project scientist at the Johns Hopkins University Applied Physics Laboratory (APL) in Laurel, Maryland.
APL designed, built, and operates the New Horizons spacecraft, and manages the mission for NASA’s Science Mission Directorate. SwRI leads the science team, payload operations and encounter science planning. New Horizons is part of the New Frontiers Program managed by NASA’s Marshall Space Flight Center in Huntsville, Alabama.
For more information, visit
Last updated May 14, 2015