Astronaut Buzz Aldrin, lunar module pilot, walks on the surface of the Moon near the leg of the Lunar Module (LM) "Eagle" during the Apollo 11 exravehicular activity (EVA). Astronaut Neil A. Armstrong, commander, took this photograph with a 70mm lunar surface camera. While astronauts Armstrong and Aldrin descended in the Lunar Module (LM) "Eagle" to explore the Sea of Tranquility region of the Moon, astronaut Michael Collins, command module pilot, remained with the Command and Service Modules (CSM) "Columbia" in lunar orbit.

The Eagle has landed

We celebrate our 50th lunar anniversary. On this day, the Eagle landed. Continue reading The Eagle has landed

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KJ Runia2019-07-202020-07-02

A computer-generated 3D image of a cup of coffee. The coffee, however, looks like a moderately turbulent sea. There's a tiny sailboat trying to avoid a lighthouse. All in this cup.

Physics, Secondary ed level, Tutorial

Why your coffee does not have tides

The moon orbits the earth and its gravity is causing the tides. But why don’t swimming pools have tides? Or a cup of coffee? Human bodies consist of water, mostly. Aren’t they tidally influenced by the moon? If you’re asking all these beautiful questions, then what you thought is causing the tides is probably wrong, and here’s why. Continue reading Why your coffee does not have tides

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KJ Runia2019-03-022020-07-02

Happy New Year: Earth is Amazing

Happy New Year. Earth is amazing. Witness, in 4K, both the visual data and the audio recording of the crew of Apollo 8 when the iconic Earthrise photograph was taken. Continue reading Happy New Year: Earth is Amazing

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KJ Runia2019-01-012020-07-02