Everything below comes from one thing: the axis the Earth spins on is not perpendicular to the plane it orbits in. Every seasonal phenomenon anywhere is a consequence of that…
There is a question that sounds unanswerable and turns out to be a geometry problem.
How far away is a star? You cannot go there. You cannot bounce anything off…
Everybody who has been somewhere completely dark reports the same surprise: the sky is bright.
Not bright like daylight, but visibly not black. There is enough light to see the…
Source: Wikipedia
Archaeology depends on context. An object in the ground is surrounded by information — what layer it sat in, what was beside it, how it was arranged, what the…
Almost nobody looks at a dark night sky and thinks it requires explanation. It is dark because the sun has set, which seems sufficient.
It is not sufficient, and noticing…
Two kinds of place are worth visiting: working research sites at altitude, and historic instruments in cities that show how the work was done before electronics. Here are eleven of…