Skiddaw Little Man (NY 266277, 865m) Skiddaw Man (NY 260290, 931m) 10.7 kilometres 740m of ascent On the way home from Yorkshire, a few months ago, I took a quick swerve into the Lake District to spend a couple of hours wandering up and down the tourist route on Skiddaw. Other priorities meant that I … Continue reading Lake District: Skiddaw
The Celestial View From A Relativistic Starship: Part 4
This series of posts is about what the sky would look like to an observer travelling at close to the speed of light. In Part 1, I described the effects of light aberration on the apparent position of the stars; in Part 2, I introduced the effects of Doppler shift on the frequency of the … Continue reading The Celestial View From A Relativistic Starship: Part 4
Latin Plurals: Nouns Ending In -a
A discussion of the plurals of nouns ending in -a, many (but not all) of which are of Latin origin
The Celestial View From A Relativistic Starship: Part 3
This is the third of a series of posts about what the sky would look like for the passengers aboard an interstellar spacecraft moving at a significant fraction of the speed of light, like the Bussard interstellar ramjet above. In the first post, I wrote about light aberration, which will cause the apparent direction of … Continue reading The Celestial View From A Relativistic Starship: Part 3
Stephen R. Wilk: How The Ray Gun Got Its Zap
I sometimes think that we should spend at least a little time explaining everyday manifestations of physics to undergraduates, so that they can talk about phenomena that appear in everyday lives. How The Ray Gun Got Its Zap (2013), is subtitled Odd Excursions Into Optics, which (combined with the manifesto above) pretty much covers what … Continue reading Stephen R. Wilk: How The Ray Gun Got Its Zap
The Celestial View From A Relativistic Starship: Part 2
In my previous post, I described the visual appearance of the starry sky for an observer moving at a substantial fraction of the speed of light—for instance, aboard a working Bussard interstellar ramjet, like the one pictured above. I’ll recap the terminology I established in that post, which comes from Special Relativity. We call the … Continue reading The Celestial View From A Relativistic Starship: Part 2
CCCP 2018: Dornie
This year the Crow Craigies Climbing Party stationed itself in Dornie, on Loch Alsh, handily placed for any number of hills. Static high pressure over the North Atlantic brought a succession of warm, humid days with light winds, often with low cloud in the morning dissipating to bring blue skies in the afternoon. The moral … Continue reading CCCP 2018: Dornie
The Celestial View From A Relativistic Starship: Part 1
This is another one of those topics (like Coriolis effect and human vacuum exposure) that many science fiction writers seem to know enough about to include it in their stories, but not quite enough to get right. So in this post (and an estimated three subsequent posts) I’m going to write about what the starry … Continue reading The Celestial View From A Relativistic Starship: Part 1
Latin Plurals: Nouns Ending in -us
A discussion of the plurals of nouns ending in -us, most (but not all) of which derive from Latin
Two Books About Longitude
A review of “Greenwich Time and the Longitude”, by Derek Howse, and “Finding Longitude” by Richard Dunn & Rebekah Higgitt.