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But the lake doesn't have a firm surface it's thick mud. The Arabana guides, Dean Stuart and Dave Strangway, who came with us on the trip were a huge help. But the Arabana understood the urgency, and gave consent almost immediately. We would need their permission before we could go out on the lake. In addition, Kati Thanda has spiritual significance for the Arabana people. Much more of it and any trace of the rock might be wiped away. At the end of the fireball it had more likely been whittled down to between 2kg and 6kg.ДЄlongside the effort to work all this out, we were putting together logistics for the trip. When it entered the atmosphere, it was about 80kg. Credit: Desert Fireball Network, Curtin University Their analysis showed that the object came in at a very steep angle, with a velocity of 50,000km/h, and punched down low in the atmosphere, still visible as a fireball at 18km altitude. The more accurately we could pinpoint the fall position, the easier any search would be. Some of our team set to work pulling together all the data. We took a light aircraft flight from William Creek, which showed us that there was a feature on the surface that might be where the rock plunged into the mud. First, we had to get out to South Australia to pick up additional data from cameras that weren't online, so that we could precisely triangulate the fireball. With data from just a couple of cameras, we could tell pretty quickly that we had a meteorite on the ground. The stations sent alerts to our server in Perth, attaching thumbnails of the fireball image. When that fireball lit up the skies above South Australia in November, it was imaged by five Desert Fireball Network automatic observatories. Credit: Desert Fireball Network, Curtin University, Author provided One of the automated cameras keeping watch on the sky. They are capable of operating for 12 months without maintenance, storing all imagery collected over that period. This is a project that started in 2012 and since then we've installed a network of 32 automated observatories in remote areas of Australia. The goal of the Desert Fireball Network is to provide that data. What they need are orbits and the ability to track meteorites back to their place of origin in the solar system. In almost all cases, meteorite researchers have no idea where their samples came from. They sample hundreds of different heavenly bodies, a compositional diversity that spans the entire inner solar system.Д«ut the most basic piece of data вЂ“ context вЂ“ is absent. They contain a unique physical record of the formation and evolution of the solar system, and the processes that led to terrestrial planets. Meteorites are the oldest rocks in existence. Thankfully, a new meteorite tracking system we've installed in Australia has enabled us to answer these questions, helping us better understand the history and composition of our solar system.

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But how to find the impact site of that meteorite? And how can we know where in the solar system the object came from?