Facts and figures

Stars (totals)

Double stars

Variable stars

Stars with exoplanets

Deep sky objects altogether

Open clusters

1903 open clusters

985 visible with 4-inch telescopes

1474 visible with 8-inch telescopes

1664 visible with 12-inch telescopes

239 additional objects

includes the complete Basel, Berkeley, Bochum, King, Stock, Tombaugh, Trümpler catalogs

Globular clusters


Star clouds

Planetary nebulae

Galactic nebulae

Dark nebulae


Groups of galaxies

Clusters of galaxies