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Tag Archives: giant impacts
Asteroid impacts+hydrogen = recipe for Mars life
A new study reveals asteroid impacts on ancient Mars could have produced key ingredients for life if the Martian atmosphere was rich in hydrogen. An early hydrogen-rich atmosphere on Mars could also explain how the planet remained habitable after its … Continue reading
Posted in Reports
Tagged asteroid belt, asteroid impacts, bolide impacts, giant impacts, hydrogen, impacts, life, nitrates, nitrites, nitrogen
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Phobos, Deimos formed after giant impact
Southwest Research Institute scientists posit a violent birth of the tiny Martian moons Phobos and Deimos, but on a much smaller scale than the giant impact thought to have resulted in the Earth-Moon system. Their work shows that an impact … Continue reading
Crustal dichotomy: First a giant impact, then a superplume at the antipode
The result of collaboration between researchers at UC Berkeley, USA and the Institute of Earth Sciences, Taiwan, suggests a two-stage process to explain the martian crustal dichotomy. The dichotomy is a 5-km elevation difference between the northern and southern hemispheres … Continue reading
Posted in Reports
Tagged Borealis basin, crustal dichotomy, crustal thickness, giant impacts, mantle dynamics, northern lowlands, northern plains, plume
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HRSC: Mars impact crater or supervolcano?
These images from [the High Resolution Stereo Camera on] ESA’s Mars Express show a crater named Ismenia Patera on the Red Planet. Its origin remains uncertain: did a meteorite smash into the surface or could it be the remnants of … Continue reading
Posted in Reports
Tagged Arabia Terra, crustal dichotomy, DLR, ESA, European Space Agency, FU Berlin, giant impacts, High Resolution Stereo Camera, HRSC, Ismenia Patera, Mars Express, MEX, volcanics
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Asteroids from a martian mega-impact?
Like evidence left at a crime scene, the mineral olivine may be the clue that helps scientists piece together Mars’s possibly violent history. Could a long-ago giant impact have flung pieces of Mars throughout our inner solar system? Two researchers … Continue reading
Posted in Reports
Tagged asteroids, giant impacts, impacts, Mars trojan asteroids, olivine
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Vapor loss during accretion shapes planetary compositions
Analysing a mixture of earth samples and meteorites, scientists from the University of Bristol have shed new light on the sequence of events that led to the creation of the planets Earth and Mars. Planets grow by a process of … Continue reading
Giant impact made Mars moons Phobos, Deimos
Where did the two natural satellites of Mars, Phobos and Deimos, come from? For a long time, their shape suggested that they were asteroids captured by Mars. However, the shape and course of their orbits contradict this hypothesis. Two independent … Continue reading