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The 62-year-old also explained how the clock keeps its time during the year despite the forces of gravity on the minute hand.

This clock-inspired design involves placing two nanorods made of Mg at a certain modifiable angle, resembling the hour and minute hands of a clock.

Two years later, the minute hand moved forward to just 100 seconds before midnight, and this January — the most recent Doomsday Clock announcement — it was, for the first time ever, inched forward to 90 seconds.

The only motion was the minute hand and the agitated red star-shaped time indicator on Fischer’s clock.

Webb is a big telescope, so it slews slower than the minute hand on a clock.