Nicknamed Earth 2.0, Kepler-452b orbits a Sun-like star in its habitable zone; here’s why this distant world still captures our imagination.

A trip from Fairbanks to the Arctic Circle to chase the Northern Lights, with the photos, timing, and camera tips I learned along the way.

From the yellow glow over Tucson to rare satellite flares and meteor showers, here’s what light pollution hides and why it’s worth looking up.

Tucson’s night sky is a wonder and a punishment: here’s how to escape the city glow, stay safe, and catch satellite flares and meteor showers.

From dying stars to singularities, event horizons, and relativistic jets, here’s a plain-language look at how black holes work.