An orrery is a model that can simulate the relative positions and orbits of planets by arranging planets with a rotating mechanism around the sun. Its origins date back to the BC era, and the official ...

[Frans] claims to have made the world’s smallest wooden orrery. We won’t take a position on that — such things are best left up to the good folks at Guinness. But given that the whole thing is ...

The Lamont-Doherty Earth Observatory comprises about a dozen small buildings nestled among pine trees in the Palisades, 15 miles north of Manhattan. On the second floor of the observatory’s geoscience ...