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The Tall Towers
In 1945, science fiction author Arthur C. Clarke published “Extra-Terrestrial Relays – Can Rocket Stations Give Worldwide Radio Coverage?” in Wireless World magazine. Clarke calculated a special orbit, about 36 000 km above the equator with a period of one sidereal day, in which artificial satellites would appear to hover motionless above Earth. The satellites…
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Hiking to conference
Last weekend, I attended a conference in Germany. I used the opportunity during my sabbatical to return to this conference series, which I attended the last time in 2002. The conference takes place in a small village in the Harz, a Mittelgebirge (I didn’t know that this is an English word!) in Northern Germany. Because I…
Month: February 2020
Recent Comments
Nice post, John! Thanks for writing these. I always enjoy them.
David Smith’s ein stein is an awesome shape!
Recent Posts
- Sabbatical trip to Europe – Part 3 (Otto Rössler)
- Sabbatical trip to Europe – Part 2 (Switzerland)
- Sabbatical trip to Europe – Part 1 (Lviv, Ukraine)
- The Longest Flight
- Where Are the Stars?
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Thanks, Mark! I enjoy reading your posts as well.