想到一件物品在太空中停留那么久似乎令人惊讶，但目前仍在轨道上的最古老的卫星——先锋1号——在2018已年满60岁。

It might seem surprising to think about an item staying in space for that long, but the oldest satellite still in orbit—Vanguard 1—turned 60 in 2018.

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第一艘造访土星的太空船先锋11号，是个相当简单的探测器，于1974年飞越木星，然后于1979年快速经过土星。

The first spacecraft to visit Saturn, Pioneer 11, was a relatively simple probe that flew by Jupiter in 1974 and raced past Saturn in 1979.

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