We witnessed a historical cosmic moment on Monday. Mercury, strolling along its orbit between the Earth and the Sun, appeared as a tiny black dot on top of our galaxy’s star. The entire 7.5-hour event was live streamed online, with NASA posting regular photo updates of Mercury’s transit. And now, you can relive the whole thing by watching a fantastic time-lapse video that condenses the 7.5-hour journey into a 2-minute video.
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