We Broke Time. Here's How to Fix It.
Has the industrial 2×12 hour timekeeping led us away from nature and astronomy?
How the Moon Shapes Life on Earth
There is a quiet companion to our world, a pale and patient presence that has circled Earth for more than four billion years.
The Moon Is the Master of Oceans: Tides Explained
The Moon creates two tidal bulges on opposite sides of Earth — one pulled by gravity, one pushed by orbital inertia.
The Moon as a Stepping-Stone for Humankind
An essay on why our nearest neighbor is about to become our most important continent.
A Lunar Eclipse — All Sunrises and Sunsets Projected on the Moon
A lunar eclipse is one of the most elegant demonstrations of geometry in the local universe, and it's completely free.
Solar Eclipses: The Main Event You Have to Experience
A solar eclipse is the solar system showing off — a glimpse into cosmos you have to experience in person.
Carrington Event: The Solar Storm That Could Disrupt Modern Civilization
Our life-giving Sun continuously sends bursts of particles into space. A Carrington-scale strike today could cost trillions and disrupt modern civilization.