The Night Sky, Explainedby Dmitry Shteynbuk

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Nightly Logbook (Blog) /blog
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FAQ /faq
Astronomy vs. Astrology /astronomy-vs-astrology

Hubs

Articles — Night Sky Basics

The Celestial Sphere: How the Sky Is Organized /articles/celestial-sphere
Magnitude: How Astronomers Measure Brightness /articles/magnitude-brightness
Learning the Sky: Five Constellations That Anchor Everything /articles/learning-the-sky

Articles — The Solar System

Why Orbits Work: Kepler's Three Laws in Plain Language /articles/keplers-laws
The Moon's Phases, Finally Explained Properly /articles/moon-phases
Comets, Asteroids, and Meteors: What's the Difference? /articles/comets-asteroids-meteors

Articles — Stars & Stellar Evolution

How a Star Is Born /articles/how-a-star-is-born
The HR Diagram: The Single Most Useful Chart in Astronomy /articles/hr-diagram
How Stars Die: White Dwarfs, Neutron Stars, and Black Holes /articles/how-stars-die

Articles — Galaxies & Deep Sky

The Milky Way: Reading Our Own Galaxy from Inside It /articles/milky-way
Nebulae: The Four Kinds and How to See Them /articles/nebulae-four-kinds
How Far Is Far: The Cosmic Distance Ladder /articles/distance-ladder

Articles — Telescopes & Observation

Refractor vs. Reflector vs. Catadioptric: Optics, Honestly Compared /articles/refractor-vs-reflector
Your First Telescope: Why Aperture Beats Magnification /articles/first-telescope
Eyepieces and Focal Ratio: The Math That Sets Your View /articles/eyepieces-focal-ratio

Articles — Astrophotography

Astrophotography with What You Have: Phone and Tripod /articles/phone-and-tripod
Tracking the Sky: Why Equatorial Mounts Exist /articles/equatorial-mounts
Stacking: How Amateurs Beat Light Pollution with Math /articles/stacking

Articles — History of Astronomy

Ptolemy to Copernicus: Moving the Center of the Universe /articles/ptolemy-to-copernicus
Galileo's Telescope: Four Moons That Changed Everything /articles/galileos-telescope
Hubble, Leavitt, and the Night the Universe Got Bigger /articles/hubble-and-leavitt

Articles — Miami & South Florida Skywatching

Watching Cape Canaveral Launches from Miami: What You Can See and When /articles/canaveral-launches-from-miami
Dark-Sky Sites Near Miami: The Everglades, Big Cypress, and the Keys /articles/everglades-dark-sky
The Southern Sky at 25°N: Stars Miami Sees That the North Never Does /articles/southern-sky-25n
Tropical Observing: Humidity, Haze, Hurricane Season, and the Surprisingly Steady Seeing of South Florida /articles/tropical-observing-south-florida

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