Deep-Sky Objects

Deep-sky objects are celestial objects that exist outside our solar system. Three major types of deep-sky objects are nebulae, star clusters, and galaxies.

Astronomy for beginners, Deep-Sky Objects

Corona Australis, the Castaway Cluster, and the Red Spider Nebula

Deep-Sky Objects, Stars

Radio telescopes settle controversy over distance to Pleiades

Deep-Sky Objects, Galaxies

Open cluster M25, open cluster IC 4665, and spiral galaxy NGC 6503

Deep-Sky Objects, Galaxies

Open cluster M26, globular cluster M56, and spiral galaxy IC 4808

Deep-Sky Objects, Exotic Objects

Fascinating rhythm: light pulses illuminate a rare black hole

Deep-Sky Objects, Stars

Hubble revisits a globular cluster’s age

Deep-Sky Objects, Milky Way

The center of the Milky Way, globular cluster M92, and the Little Ghost (NGC 6369)

Astronomy for beginners, Deep-Sky Objects

The constellation Corona Borealis, globular cluster M9, and the Lobster Nebula (NGC 6357)

Deep-Sky Objects

The Omega Nebula, Graff’s Cluster, and planetary nebula IC 1295

Deep-Sky Objects

Two subtle wonders near Gamma Cygni

Deep-Sky Objects, Galaxies

The Lagoon Nebula, the Trifid Nebula, and the Southern Whirlpool Galaxy

Deep-Sky Objects, Stars

Lives and deaths of sibling stars

Popular Observing Topics

Credit: NASA Goddard Space Flight Center/Public Domain via Wikimedia Commons.

The Sun

Safely observing the Sun can be a fun and rewarding experience.

Credit: Ted Hauter.

The Moon

Our nearest celestial neighbor provides many great sights.

Planets

Targeting our solar system’s other worlds is well worth the effort.

Credit: Tony Hallas.

Deep-Sky Objects

Nebulae, star clusters, and galaxies are the night sky’s hidden gems.

Credit: Celestron.

Telescopes & Equipment

Explore the tools that can help you unlock the night sky.

Credit: Peter Michaud, Gemini Observatory.

Astrophotography

Capturing great celestial sights is both an art and a skill.

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