Clarksville, TN Online: News, Opinion, Arts & Entertainment.


NASA’s New Horizons Spacecraft sees what could be Clouds on Pluto

 

Written by Guy Webster
NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – The next target for NASA’s New Horizons mission — which made a historic flight past Pluto in July 2015 — apparently bears a colorful resemblance to its famous, main destination.

NASA’s Hubble Space Telescope data suggests that 2014 MU69, a small Kuiper Belt object (KBO) about a billion miles (1.6 billion kilometers) beyond Pluto, is as red, if not redder, than Pluto. This is the first hint at the surface properties of the far-flung object that New Horizons will survey on January 1st, 2019.

Pluto's present, hazy atmosphere is almost entirely free of clouds. However, scientists from NASA's New Horizons mission have identified some cloud candidates -- suggestive of possible, rare condensation clouds -- in images taken during the spacecraft's July 2015 flight through the Pluto system. (NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Center)

Pluto’s present, hazy atmosphere is almost entirely free of clouds. However, scientists from NASA’s New Horizons mission have identified some cloud candidates — suggestive of possible, rare condensation clouds — in images taken during the spacecraft’s July 2015 flight through the Pluto system. (NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Center)

Mission scientists are discussing this and other Pluto and Kuiper Belt findings this week at the American Astronomical Society Division for Planetary Sciences (DPS) and European Planetary Science Congress (EPSC) meeting in Pasadena, California.

“We’re excited about the exploration ahead for New Horizons, and also about what we are still discovering from Pluto flyby data,” said Alan Stern, principal investigator from Southwest Research Institute in Boulder, Colorado. “Now, with our spacecraft transmitting the last of its data from last summer’s flight through the Pluto system, we know that the next great exploration of Pluto will require another mission to be sent there.”

Stern said that Pluto’s complex, layered atmosphere is hazy and appears to be mostly free of clouds, but the team has spied a handful of potential clouds in images taken with New Horizons’ cameras. “If there are clouds, it would mean the weather on Pluto is even more complex than we imagined,” Stern said.

Scientists from NASA's New Horizons mission have spotted signs of long run-out landslides on Pluto's largest moon, Charon. This perspective view of a chasm on Charon uses stereo reconstruction of images taken by two cameras on New Horizons, supplemented by a "shape-from-shading" algorithm. (NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Center)

Scientists from NASA’s New Horizons mission have spotted signs of long run-out landslides on Pluto’s largest moon, Charon. This perspective view of a chasm on Charon uses stereo reconstruction of images taken by two cameras on New Horizons, supplemented by a “shape-from-shading” algorithm. (NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Center)

Scientists already knew from telescope observations that Pluto’s icy surface below that atmosphere varied widely in brightness. Data from the flyby not only confirms that, it also shows the brightest areas (such as sections of Pluto’s large heart-shaped region) are among the most reflective in the solar system.

“That brightness indicates surface activity,” said Bonnie Buratti, a science team co-investigator from NASA’s Jet Propulsion Laboratory in Pasadena. “Because we see a pattern of high surface reflectivity equating to activity, we can infer that the dwarf planet Eris, which is known to be highly reflective, is also likely to be active.”

While Pluto shows many kinds of activity, one surface process apparently missing is landslides. Surprisingly, though, they have been spotted on Pluto’s largest moon, Charon, itself some 750 miles (1,200 kilometers) across.

“We’ve seen similar landslides on other rocky and icy planets, such as Mars and Saturn’s moon Iapetus, but these are the first landslides we’ve seen this far from the sun, in the Kuiper Belt,” said Ross Beyer, a science team researcher from Sagan Center at the SETI Institute and NASA Ames Research Center, Moffett Field, California. “The big question is will they be detected elsewhere in the Kuiper Belt?”

Both Hubble and cameras on the New Horizons spacecraft have been aimed at KBOs over the past two years, with New Horizons taking advantage of its unique vantage point in the Kuiper Belt to observe nearly a dozen small worlds in this barely explored region.

MU69 is actually the smallest KBO to have its color measured — and scientists have used that data to confirm the object is part of the so-called cold classical region of the Kuiper Belt, which is believed to contain some of the oldest, most prehistoric material in the solar system.

Scientists from NASA's New Horizons mission have spotted signs of long run-out landslides on Pluto's largest moon, Charon. On this image of Charon's informally named "Serenity Chasma," from New Horizons' Long Range Reconnaissance Imager (LORRI), arrows mark indications of landslide activity. (NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Center)

Scientists from NASA’s New Horizons mission have spotted signs of long run-out landslides on Pluto’s largest moon, Charon. On this image of Charon’s informally named “Serenity Chasma,” from New Horizons’ Long Range Reconnaissance Imager (LORRI), arrows mark indications of landslide activity. (NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Center)

“The reddish color tells us the type of Kuiper Belt object 2014 MU69 is,” said Amanda Zangari, a New Horizons post-doctoral researcher from Southwest Research Institute. “The data confirms that on New Year’s Day 2019, New Horizons will be looking at one of the ancient building blocks of the planets.”

The New Horizons spacecraft is currently 3.4 billion miles (5.5 billion kilometers) from Earth and about 340 million miles (540 million kilometers) beyond Pluto, speeding away from the sun at about nine miles (14 kilometers) every second. About 99 percent of the data New Horizons gathered and stored on its digital recorders during the Pluto encounter has now been transmitted back to Earth, with that transmission set to be completed October 23rd.

New Horizons has covered about one-third of the distance from Pluto to its next flyby target, which is now about 600 million miles (nearly 1 billion kilometers) ahead.

The Johns Hopkins University Applied Physics Laboratory in Laurel, Maryland, designed, built and operates the New Horizons spacecraft, and manages the mission for NASA’s Science Mission Directorate. In addition to being the home of the mission principal investigator, SwRI, based in San Antonio, leads the science team, payload operations and science planning.

New Horizons is the first mission in NASA’s New Frontiers Program, managed by NASA’s Marshall Space Flight Center in Huntsville, Alabama.

For more on the New Horizons mission, visit:

www.nasa.gov/newhorizons

http://pluto.jhuapl.edu


Sections

Technology

Topics

, , , , , , , , , , , , , , , , , , , , , , , , , , ,

Comments

You must be logged in to post a comment.


  • Visit Us On FacebookVisit Us On TwitterVisit Us On GooglePlusVisit Us On PinterestVisit Us On YoutubeCheck Our Feed
  • Personal Controls

    Archives