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Losing Betelgeuse
At my computer Tuesday evening, I receive a message from a university physics chat that is both thrilling and chilling: LIGO + Virgo report a “burst” gravitational wave event, possibly due to a core-collapse supernova (or a binary collision where one object is in the hypothetical “mass gap” between black holes and neutron stars). The…
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Continental Bridge
I remember looking at a classroom map of Earth and thinking the continents seem like puzzle pieces, especially north and south America in the west and Europe and Africa in the east. I mentally fit them together. Later I learned about continental drift and plate tectonics, driven by gravity and mantle convection, with newborn crust…
Month: January 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)
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- Where Are the Stars?
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Thanks, Mark! I enjoy reading your posts as well.