Astronomy Glossary

Telescopes Equipment

A T-ring is a camera-specific adapter that attaches a camera body to telescopes via the standard T-thread (M42×0.75mm) mounting system.

Solar System

Trans-Neptunian Objects are bodies orbiting beyond Neptune (>30 AU), including Kuiper Belt objects, scattered disk objects, and detached objects.

Astronomy Concepts

A transit is when a smaller object passes in front of a larger one (opposite perspective from occultation, but often used interchangeably).

Solar System

Trojan asteroids are objects trapped at a planet's L4 and L5 Lagrange points—stable gravitational equilibrium positions 60° ahead and behind the plane...