New Horizons: New 'treasure trove' of high resolution images show Pluto's surface in greater detail
New high-resolution images downloaded from NASA's New
Horizons probe over 5 billion kilometres away have stunned scientists,
revealing Pluto's pitted and cratered surface in even more detail than
before.
The New Horizons probe passed Pluto in July,
sending back the first close-up images ever seen of the dwarf planet
and taking tens of gigabits of data that will take an entire year to
send back to Earth.
The latest images now show a range of highly
complex surface features, including mountains, deep networks of valleys,
nitrogen ice flows and possible wind-blown dunes.
"This is what we came for — these images, spectra and
other data types that are going to help us understand the origin and
the evolution of the Pluto system for the first time," said New Horizons
principal investigator Alan Stern, of the Southwest Research Institute
(SwRI) in Colorado.
"And what's coming is not just the remaining
95 per cent of the data that's still aboard the spacecraft — it's the
best datasets, the highest-resolution images and spectra, the most
important atmospheric datasets, and more. It's a treasure trove.
"Pluto is showing us a diversity of landforms and complexity of processes that rival anything we've seen in the solar system.
"If
an artist had painted this Pluto before our flyby, I probably would
have called it over the top — but that's what is actually there."
The
revelation of possible dunes on the dwarf planet's surface has also
piqued scientists' interest, as they indicate the atmosphere would have
had to be thicker for wind to create the formations.
Timelapse: Pluto comes into focus
View an interactive timelapse of Pluto images captured by New Horizons, and find out what they tell us about this icy dwarf planet.
"Seeing dunes on Pluto — if that is what they are — would be
completely wild, because Pluto's atmosphere today is so thin," said
William B McKinnon, a GGI deputy lead from Washington University.
"Either Pluto had a thicker atmosphere in the past, or some process we haven't figured out is at work. It's a head-scratcher."
The images have more than doubled the amount of Pluto's surface, seen at resolutions as good as 400 metres per pixel.
They
have also revealed Pluto's global atmospheric haze has more layers than
scientists realized, creating a twilight effect that softly illuminates
nightside terrain near sunset, making it visible to the cameras aboard
New Horizons.
"This bonus twilight view is a wonderful gift that Pluto has handed to us," said John Spencer, a GGI deputy lead from SwRI.
"Now we can study geology in terrain that we never expected to see."
The
discoveries made from the new imagery will not be limited to the dwarf
planet itself — better images of Pluto's moons Charon, Nix and Hydra are
also set to be released.
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