At the meeting of the Society in November last I mentioned that on the day of the next opposition of the planet Mars, the Earth and Moon, as seen from Mars, would cross the Sun’s disk, a phenomenon which has not happened since the year 1800, and I stated the chief circumstances connected with the … Continue reading Transit Of Earth
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Natural Earth Data in QGIS 3: Part 2
Last time, I described how I used free Natural Earth data and the software package QGIS to produce a basic map of Alaska and its surroundings, shown above. This time, I’m going to lay some more vector datasets on top of this map to make it a little more useful. First, I want to add … Continue reading Natural Earth Data in QGIS 3: Part 2
Advent
ˈædvənt Advent: in the ecclesiastical calendar, the season immediately preceding the festival of the Nativity, now including the four preceding Sundays Advent comes from Latin adventus, “arrival”, and the capitalized Advent refers, of course, to the arrival of the child Jesus, celebrated on Christmas Day. Because of the ecclesiastical business about Advent starting four Sundays … Continue reading Advent
Banks et al.: Why Do Animal Eyes Have Pupils Of Different Shapes?
Human eyes have round pupils, but there is considerable variation in the animal kingdom, from the vertical slit pupil of a cat, to the horizontal slot of a goat, as pictured above. So Martin S. Banks and his colleagues asked the question “Why?” in an article published in Science Advances in August 2015. They started … Continue reading Banks et al.: Why Do Animal Eyes Have Pupils Of Different Shapes?
How Apollo Left Earth (And Returned): Part 2
This is the long-delayed second post in my discussion of the departure and return orbits of the Apollo missions. If you haven’t read the first post, you can find it here—it’ll give some useful background to what follows. The diagram at the head of this post shows a plot of Apollo 11’s departure trajectory, superimposed on … Continue reading How Apollo Left Earth (And Returned): Part 2
Isobel Wylie Hutchison: North to the Rime-Ringed Sun
We were northward bound for Alaska and her blue midnights! Her golden blossoms! Her trackless forests! Her naked tundras! I’ve written about the redoubtable Isobel Wylie Hutchison before—a Scottish lady of independent means who spent her life travelling and botanizing, often while walking prodigious distances alone. She recorded her travels in articles for National Geographic … Continue reading Isobel Wylie Hutchison: North to the Rime-Ringed Sun
Natural Earth Data in QGIS 3: Part 1
A while ago, I wrote about my experience using Ordnance Survey data to generate maps of the UK using the free and open-source Geographical Information System package QGIS 3. At that time I was using the then-current Long-Term Release, QGIS 3.4. Things have moved on, though, and this report uses the current QGIS LTR, version … Continue reading Natural Earth Data in QGIS 3: Part 1
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Cenotaph
Never [before] has the Cenotaph, in its 103 years of standing sentry on Whitehall, been “defended” on Armistice Day by a Port Vale fan supping a can of Stella Artois. Mark Townsend, The Guardian, 11 November 2023 The Cenotaph stands in central London, at the point where Whitehall becomes Parliament Street, opposite the weird neo-Tudor … Continue reading Cenotaph
The Solar System’s Place In The Milky Way: Part 2
At the end of my previous post on this topic, I left you with a diagram of the solar system’s orientation and approximate trajectory in its orbit around the Milky Way galaxy. Below, we’re looking past the solar system towards the galactic core. The plane of the galaxy runs horizontally across the image, north is … Continue reading The Solar System’s Place In The Milky Way: Part 2
Sorry
Sorry Seems To Be The Hardest Word Elton John / Bernie Taupin (1976) Every now and then, a journalist gets some mileage out of writing about how British people say “Sorry!” a lot in trivial settings—when we’ve found ourselves in someone’s way, when someone has misunderstood our meaning, when we’ve snaffled the last biscuit just … Continue reading Sorry