In the past, there have been some very complicated theories developed to explain how enough water rained down on Earth from the outer solar system.Īccording to one contentious idea called the NICE theory, asteroids could have been slung into the inner solar system by a disruptive rearrangement of the planets. What could this tell us about finding life on other planets? The most likely candidates from this far out are 'carbonaceous chondrites' - like the famous Murchison meteorite that landed in Australia - that contained not only water but carbon and amino acids. In fact, you really need the later visitors from the outer solar system for other important ingredients for life. These were created by looking through satellite pictures taken over time. Planet revolutionized the earth observation industry with the highest frequency satellite data commercially. The Blue Marble is an image of Earth taken on December 7, 1972, from a distance of about. Professor Ireland said you can't exclude water arriving later. The leading provider of global daily Earth data. "We estimated we need about 5 per cent from this process." ![]() "To explain the water in the oceans we still need a bit of water from the outer solar system," she said. "I am very excited about the outcomes of this work and where it will lead the debate on this topic," said Ellie Sansom, project manager of the Desert Fireball Network.īut not all the water in Earth's oceans formed here according to Dr Piani's analysis. Meteorite researchers at Curtin University also welcomed the study. "I'm happy that it does represent actual water," he said. Browse 5,163 planet earth from space stock photos and images available, or search for planet earth from space station or planet earth from space europe to find more great stock photos and pictures. "The Piani article effectively nails anyone saying that the inner solar system is completely dry," he said.Įven though Dr Piani's team measured hydrogen rather than water directly, Professor Ireland was convinced the findings were valid. They include planetary scientist Trevor Ireland from the Australian National University, who is researching water in planetary bodies. Long debate about origins of Earth's waterĪ growing number of scientists have been challenging the long-standing textbook theory about how Earth got its oceans. "It looks like what people thought was really dry rock has enough water - if you accumulate a lot of it - to explain Earth's water," noted NASA geochemist Anne Peslier, who wrote an accompanying editorial in Science. ![]() ![]() In fact, according to the theory supported by Dr Piani and colleagues, this is exactly the process that would have produced Earth's oceans from the precursors of water hidden in the planet's building blocks. Much of what comes out of volcanoes is water vapour.
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