The Pluto System: A World of Surprises

New Horizons, NASA’s intrepid spacecraft, has beamed back the first closeup images of Pluto, revealing a world teeming with unexpected geological activity and intriguing features.

Pluto’s Ice Mountains

One of the most striking surprises is the presence of towering ice mountains on Pluto’s surface. These mountains, composed of water ice, reach heights of up to 11,000 feet and are located near the planet’s equator. Scientists believe that these mountains were formed by geological forces, rather than by impacts, and that they may be a sign of ongoing geological activity.

Charon’s Complex Surface

Pluto’s largest moon, Charon, also boasts a surprisingly complex surface. New Horizons images show a landscape adorned with geological features, including a dark region informally dubbed Mordor. The moon also exhibits a striking trough that stretches up to 600 miles across its face and a canyon that cuts four to six miles deep. These features suggest that Charon, like Pluto, has experienced significant geological activity.

Nitrogen Ice and Cryovolcanism

Pluto’s thin atmosphere contains nitrogen ice, which scientists believe settles on the planet’s surface as the atmosphere freezes. However, the new images show that these ices are too weak to form mountains, suggesting that they may be merely a veneer over a “bedrock” of water ice.

Intriguingly, scientists speculate that internal activity, such as cryovolcanism, may be dredging nitrogen up from Pluto’s interior. Cryovolcanism is the eruption of volatile materials, such as nitrogen or methane, on icy worlds. While no evidence of cryovolcanism has yet been found on Pluto, the presence of nitrogen ice and the ongoing geological activity provide tantalizing clues that it may exist.

Hydra’s Enigmatic Shape

New Horizons also captured the best view yet of Pluto’s farthest moon, Hydra. This enigmatic moon, reminiscent of an eight-bit video game character, measures 28 by 19 miles in size. Scientists are eager to learn more about Hydra’s composition and geological history.

Implications for Icy Worlds

The discoveries made by New Horizons have profound implications for our understanding of icy worlds. They challenge the long-held belief that tidal heating from a larger orbital partner is the primary driver of geological activity on these planets. Instead, Pluto’s isolated location and ongoing geological activity suggest that other mechanisms may be at play.

These findings will undoubtedly lead to a flurry of new research and may ultimately reshape our understanding of the evolution and diversity of icy worlds throughout the solar system.

Fly-by Anniversary Reveals New Maps and Videos

Two years after the historic fly-by of the dwarf planet Pluto by NASA’s New Horizons spacecraft, scientists continue to unveil the mysteries of this distant world and its largest moon, Charon. To commemorate the anniversary, NASA has released a series of new maps and videos that offer unprecedented insights into these celestial bodies.

Fly-Over of Pluto and Charon

An immersive 3D fly-over of Pluto, created using data collected by New Horizons, takes viewers on a breathtaking journey over some of the dwarf planet’s most iconic features. One of the most striking is Sputnik Planitia, a vast nitrogen ice plain that stretches across hundreds of kilometers. The fly-over also reveals mountains, craters, and other intriguing geological formations.

A fly-over of Charon, Pluto’s largest moon, showcases its deep canyon, Serenity Chasma, named after the spaceship in the popular science fiction series Firefly. Charon also boasts a variety of other fancifully named features, such as Mordor Macula, a dark region reminiscent of the fictional realm in The Lord of the Rings.

Topographical Maps Unveiling Surface Details

The New Horizons team has also released detailed topographical maps of both Pluto and Charon. These maps were created using data from the spacecraft’s Long-Range Reconnaissance Imager and Multispectral Visible Imaging Camera. The maps reveal precise elevations of various features, including ice volcanoes, mountains, and craters.

Mysteries of the Pluto System

The complexity of the Pluto system has astounded scientists. As New Horizons principal investigator Alan Stern remarked, “Everywhere we turn are new mysteries.” The maps and videos released by NASA will help unravel these mysteries and provide a deeper understanding of Pluto and Charon’s unique characteristics.

Kuiper Belt Exploration Continues

Since its encounter with Pluto, New Horizons has embarked on a journey to explore the Kuiper Belt, a region of icy bodies beyond Neptune. In 2019, the spacecraft is set to fly by a small object more than 1 billion miles past Pluto, providing further insights into the outer reaches of our solar system.

Unveiling the Enigmas of Distant Worlds

The New Horizons mission has revolutionized our understanding of Pluto and Charon, revealing a world far more complex and intriguing than previously imagined. The newly released maps and videos provide a valuable resource for scientists and the public alike, offering a glimpse into the enigmatic realms of the outer solar system.