After traveling a billion kilometers, China s asteroid hunter finally arrives
Published: 2026-07-21 • Permanent link
What does it take to catch up with a small, tumbling rock hundreds of thousands of kilometers from Earth?
For China s Tianwen-2 mission, the answer was a 400-day chase covering roughly 1 billion kilometers (621 million miles) of deep space—one that has just e...
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Why it matters: What does it take to catch up with a small, tumbling rock hundreds of thousands of kilometers from Earth? For China s Tianwen-2 mission, the answer was a 400-day chase covering roughly 1 billion kilometers (621 million miles) of deep space...
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