Articles
Popular-science astronomy, written for amateur observers. Every concept is tied to something you can actually see.
Getting started
The on-ramp: names, tools, and how to find your way around the sky.
Basic Astronomy
What you need to know to enjoy the night sky — coordinates, magnitudes, deep-sky object types, constellations, and practical observing tips, with enough wonder to keep you coming back.
Navigating the Night Sky
How to orient yourself under the stars from mid-northern latitudes using familiar patterns — the Big Dipper as your master key, seasonal star-hopping routes, and the classic mnemonics that make the sky memorable.
Your First Telescope
A practical guide to choosing, setting up, and enjoying your first telescope — what to buy, what to avoid, and how to make your first night at the eyepiece rewarding.
Equipment Glossary
A reference guide to astronomical equipment and optical terminology — telescopes, eyepieces, mounts, filters, cameras, and the terms you'll meet when buying gear or reading reviews.
At the eyepiece
Practical technique — getting the most out of a clear night.
The Nightbase Observing Workflow
How Catalog, Difficulty Matrix, Lists, Plans, Tonight, the Star Map, Sessions, Ticks, and Observations work together — with visibility scoring, audio ticks, and AI transcription for fast field logging.
Seeing & Transparency — Reading the Night Sky's Two Dials
How to assess seeing (atmospheric steadiness) and transparency (sky clarity) for visual observing, what the Antoniadi I–V and transparency 1–5 scales actually mean, and how to pick targets that match tonight's conditions.
Sketching Astronomical Objects
A practical guide to sketching what you see through the eyepiece — techniques for stars, nebulae, galaxies, and clusters, plus how to use the Nightbase digital sketch tool.
Target guides
What to point at, grouped by object class and hemisphere.
Top 20 Targets in the Northern Sky
The finest deep-sky objects visible from northern latitudes — M42, M31, M13, M45, M51, M57, M27, M81/M82, the Double Cluster, Albireo and more — with magnitudes, sizes, observing tips for every aperture, and finder charts.
Top 20 Targets in the Southern Sky
The finest deep-sky objects visible from southern latitudes — the Magellanic Clouds, Eta Carinae, Omega Centauri, the Jewel Box, 47 Tucanae and more — with magnitudes, sizes, observing tips for every aperture, and finder charts.
Double Stars — A Guide for Observers
Two suns where one appeared — how to find, split, and appreciate the night sky's finest pairs. From Albireo's gold-and-blue to the Sirius B challenge.
Variable Stars — A Guide for Observers
A practical guide to visual observation of variable stars: estimating magnitudes, finding comparison stars, recording data, and contributing to science with AAVSO.
Exoplanets — A Guide for Observers
What exoplanets are, how astronomers find them, and the famous host stars you can observe tonight — from 51 Pegasi to Proxima Centauri.
The science behind it
Astrophysics background — why things look the way they do.
The Life of Stars
From birth in a nebula to spectacular death — how stars are born, shine, swell, and die, and how to read the clues in their starlight.
Nuclear Fusion in Stars — The Burning Stages
A physicist's tour of stellar fusion: the Coulomb barrier, the Gamow peak, the pp chain, the CNO cycle, triple-alpha, advanced burning up to iron, and the s- and r-processes — with bright example stars for each stage.
Orbital Mechanics for Observers
Kepler's laws, synodic periods, the Roche limit, and precession — framed as observable phenomena you can confirm at the eyepiece with binoculars or a small telescope.
