Indeed, many argue that it’s almost inevitable given the numbers of questions that New Horizons left in its wake. Binzel is scouring the near-side images of Pluto to better understand its current seasons.
It might be that methane froze out of the atmosphere in the same way that frost freezes on the ground on Earth. "If Pluto is an active ocean world, then that suggests that the Kuiper Belt may be filled with other ocean worlds among its dwarf planets, dramatically expanding the number of potentially habitable places in our solar system," Tuttle said.But while Pluto's liquid ocean likely still exists today, scientists suspect it's isolated in most places (though not beneath Sputnik) by almost 200 miles (320 kilometers) of ice. Because its atmosphere is warmer than the surface, downslope winds dominate — meaning that the low-lying nitrogen could never travel up the highest peaks, and high-flying methane would condense on the tallest mountains before it reached the lower parts of the surface.A view of Pluto taken by the New Horizons spacecraft after it had passed the dwarf planet. Enormous faults stretch for hundreds of miles and cut roughly 2.5 miles into the icy crust covering Pluto's surface. After a voyage of nearly 10 years and more than 3 billion miles, the intrepid piano-sized probe flew within 7,800 miles of Pluto. Medical Xpress covers all medical research advances and health news Tech Xplore covers the latest engineering, electronics and technology advances Science X Network offers the most comprehensive sci-tech news coverage on the web
by Tricia Talbert, Five years ago today, NASA's New Horizons spacecraft made history. | Pluto New HorizonsOne year ago, NASA’s New Horizons mission made history by exploring Pluto and its moons – giving humankind our first real look at this fascinating world on the frontier of our solar system.One year ago, NASA’s New Horizons mission made history by exploring Pluto and its moons – giving humankind our first real look at this fascinating world on the frontier of our solar system.Pluto sends a breathtaking farewell to New Horizons. "It's a process called true polar wander—it's when a planetary body changes its spin axis, usually in response to large geologic processes," said James Tuttle, a planetary scientist and New Horizons team member at the Jet Propulsion Laboratory in Pasadena, California. SATURNUS – PLUTO conjunctie in 2020 – Grote veranderingen. Tegen 2020 zullen deze twee krachtige karmaplaneten zich verbinden in conjunctuur van Steenbok. But maybe not "volcanic" in the way you might think.On Earth, molten lava spits, drools, bubbles, and erupts from underwater fissures through volcanoes sitting miles high in and protruding from the oceans, like on Hawaii. Dunes require small particles and sustained, driving winds that can lift and blow the specks of sand or whatever else along. The heart's left ventricle, called Sputnik Planitia, literally forced the dwarf planet to reorient itself so the basin now faces almost squarely opposite Pluto's moon Charon. Bertrand suspects that this effect could have perturbed the latitude where the bladed terrains formed, but scientists cannot say for sure because the calculation of orbital parameters is difficult to estimate beyond the past ten million years.It’s an open question that could inspire future work. And despite its weak gravity, thin atmosphere, extreme cold and entire surface composition of ices, Pluto apparently had (or still may have) everything needed to make dunes. "That surprised us because there were fewer small craters than we expected, which means there are also fewer small Kuiper Belt objects than we expected," said Kelsi Singer, a New Horizons deputy project scientist and coinvestigator from the Southwest Research Institute in Boulder, Colorado. There's nothing like it in any of Earth's glaciers, and or anywhere else in the solar system that we've explored!Cold and far-flung as Pluto may be, its icy "heart" still beats to a daily, rhythmic drum that drives Pluto's atmosphere and climate much in the way Greenland and Antarctica help control Earth's climate.Nitrogen ices in Pluto's heart-shaped Tombaugh Regio go through a cycle every day, subliming from ice to vapor in the daytime sunlight and condensing back on the surface during the frigid night. Sunlight is thought to drive sublimation — essentially carving out valleys between blade-like ridges.Icy peaks called penitentes in the Andes are just a few metres tall, but might be analogues of much larger ridges in Pluto’s bladed terrain.
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