The Transit of Venus
Twice every 117 years or so, Venus transits the disk of the sun. Here is some info on the events (and a photograph I took of it).
Frost Dendrites
Under which conditions can you get frost dendrites on your window?
The Foucault Pendulum
The Foucault Pendulum was conceived by Léon Foucault in the middle
of the 19th century, with the goal of proving Earth's
rotation through the effect of the Coriolis Force. In essence, the
Foucault Pendulum is a
Pendulum with a long enough damping rate such
that the precession of its plane of oscillations can be observed after
typically an hour or more. A whole revolution of the plane of
oscillation takes anywhere between a day if
it is at the pole, or longer at lower latitudes. Here is a relatively simple derivation of the precession.
Condensation of your exhaled breath
Ever wondered why and when does your exhaled breath condense?