A Japanese space probe on a data-collecting mission has shot a sampling ‘bullet’ into the surface of the Ryugu asteroid, hoping to retrieve organic material that could clue scientists into how life was first seeded on Earth.

The Hayabusa2 probe used a device called a sampler horn to fire a tantalum projectile “bullet” at the surface of Ryugu, breaking off tiny fragments that are then collected and brought home for analysis.

Scientists are on the lookout for amino acids or other organic molecules among the carbon-rich material that makes up C-type asteroids like Ryugu – compounds which could have given rise to the first life on earth under the right reactive conditions.

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The Japanese spacecraft has been shadowing Ryugu for nearly a year, sending first a smaller probe and a trio of mini-rovers down to the rock’s surface over the past few months to collect more specimens. In the next few months, Hayabusa2 is supposed to detonate a mini explosive device on Ryugu’s surface called a Small Carry-on Impactor, creating an artificial crater which will expose other layers of the rock to be sampled by the probe.

The bullet sampler works quick, grabbing its cargo in about a second, according to the Planetary Society, which declared the mission a success after a series of minute-by-minute updates.

The probe’s operators were nothing if not thorough, conducting a test run of the bullet-like sampling mechanism back at the University of Tokyo to confirm it would still work, after the surprise discovery that the surface of the asteroid had a different consistency than expected.

Launched in December 2014, Hayabusa2 spent four years matching speed and direction with Ryugu before sidling up to the asteroid last June. Ryugu is a relatively young asteroid to human eyes –discovered in 1999, it wasn’t even named until 2015– but, like other asteroids, it has been floating through space essentially unchanged for about 4.5 billion years, giving scientists a window into what the solar system looked like in its early days.

Hayabusa2 is (as the name would suggest) the second Japanese craft to visit an asteroid. The original Hayabusa brought home 1,500 particles collected from rocky Itokawa in 2010.

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