There is a fact almost everybody knows and almost nobody can explain, which makes it a useful place to start.
The Moon presents the same face to Earth continuously. The…
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…
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…
Source: Wikipedia
Antarctica has around four hundred known subglacial lakes: bodies of liquid water trapped beneath kilometres of ice, kept from freezing by geothermal heat from below and the insulating weight…
Source: Wikipedia
The Voyager probes launched in 1977 to study the outer solar system, and they did that job extraordinarily well, returning the first detailed images of Jupiter, Saturn, Uranus and…
Most claims about remote places come with an asterisk. The remotest inhabited island still has a harbour and a supply ship. The remotest town has a road, or at least…