Japan's "Falcon" Spacecraft Returns—Asteroid Dust On Board?Hayabusa probe to create twin fireballs over Australia. This weekend a Japanese spacecraft is due to return to Earth, possibly carrying the first sample taken directly from the surface of an asteroid. The Japan Aerospace Exploration Agency (JAXA) launched the craft—dubbed Hayabusa, or "falcon" in Japanese—in 2003. The probe rendezvoused wi
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