Author: John F. Lindner

The work of Newton and Laplace suggested to many that the solar system was like a giant clockwork, which was illustrated by beautiful mechanical models called orreries. The controversial Molchanov hypothesis avers that every oscillatory system evolves to a resonance governed by a family of integers, like the 3/2 resonance between the orbits of Pluto…

Last week, SpaceX conducted a successful pad abort test of its innovative Crew Dragon spacecraft. Powered by hypergolic monomethylhydrazine CH3(NH)NH2 fuel and nitrogen tetroxide N2O2 oxidizer, which ignite on contact, the Super Draco engines accelerated Dragon from 0 to 100 mph in 1.2 seconds — that’s faster than a Tesla (the electric cars made by Elon Musk’s…

As a kid, I poured over diagrams in Popular Science magazine describing possible Grand Tours of the outer solar system (Jupiter, Saturn, Uranus, Neptune, and Pluto) made possible by a rare alignment of the planets. Unfortunately, budget cuts reduced the Grand Tour to the Voyager missions to Jupiter and Saturn. While Voyager 2’s mission was ultimately…