TOKYO: A Japanese spacecraft is nearing Earth after a yearlong journey home from a distant asteroid with soil samples and data that could provide clues to the origins of the solar system, a space agency official said Friday. The Hayabusa2 spacecraft left the asteroid Ryugu, about 300 million kilometers (180 million miles) from Earth, a year ago and is expected to reach Earth and drop a capsule containing the precious samples in southern Australia on Dec. 6. Scientists at the Japan Aerospace Exploration Agency believe the samples, especially those taken from under the asteroid’s surface, contain valuable data unaffected by space radiation and other environmental factors. Makoto Yoshikawa, a Hayabusa2 project mission manager, said scientists are especially interested in analyzing organic materials in the Ryugu soil samples. “Organic materials are origins of life on Earth, but we still don(asterisk)t know where they came from,” Yoshikawa said. “We are hoping to find clues to the origin of life on Earth by analyzing details of the organic materials brought back by Hayabusa2.” JAXA, the space agency, plans to drop the capsule containing the samples onto a remote, sparsely populated area in Australia from 220,000 kilometers (136,700 miles) away in space, a big challenge requiring precision control. The capsule, protected by a heat shield, will turn into a fireball during re-entry in the atmosphere at 200 kilometers (125 miles) above ground. At about 10 kilometers (6 miles) above ground, a parachute will open to prepare for landing, and beacon signals will be transmitted to indicate its location. JAXA staff have set up satellite dishes at several locations in the target area to catch the signals, while also preparing marine radar, drones and helicopters to assist in the search and retrieval mission.