As the plutonium-238 that served as the Pioneers'onboard heat source radioactively decayed, it would have emitted less heat over time.

  • 为先驱者号们提供舱内热动力源的钚238会有放射性衰变,其发射量会随着时间的推移而越来越小。

  • 互联网摘选 2025-01-20 11:34:57

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