Observing basics
日食
Solar eclipse
The Moon covering the Sun.
The path of totality is usually only 100–200 km wide.
Related terms
- Lunar eclipse — The Moon passing into Earth's shadow.
- Zodiacal light — Sunlight scattered by interplanetary dust, a faint cone.
- Air mass — Relative air path; 1 at zenith.
- Extinction — Atmosphere dimming starlight.