Observing

Telescope Buying Guide

Beginner Telescope Guide: Choose the Right First Scope

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What telescope should a beginner buy? Overview for beginners People often ask what telescope an aspiring amateur astronomer should buy. There isn't a single…
solarimaging

Solar System Imaging: Telescope, Camera & Filters Guide

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Introduction Some of the most visible features in our sky are solar system objects: the Sun, the Moon, and the planets. These objects are generally much…

15 of the Best PF 2017 Eclipse Photos

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The 2017 August Eclipse really was something special. Fortunately Physics Forums has great photographers and snapped some remarkable shots. Here are a…
astro_advanced

Astrophotography: Mounts, Tracking & Image Processing

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Series linksPart 1: Introduction to Astrophotography Part 2: Intermediate Astrophotography Part 3: Advanced AstrophotographyMotivation "I’ve…
astro_inter

Astrophotography Guide: Equipment, Exposure & Processing

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Complete Series Part 1: Introduction Astrophotography Part 2: Intermediate Astrophotography Part 3: Advanced Astrophotography Level…
astro_intro

Astrophotography Guide: Beginner to Advanced Tips & Gear

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Part 1: Introduction to Astrophotography Part 2: Intermediate Astrophotography Part 3: Advanced AstrophotographySeries & prerequisites For…
earth year

How to Scientifically Measure How Many Days Are in a Year

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How many days are there in a year? Ask pretty much anyone and they will tell you 365, except for leaps years which have 366. In addition,…
solar_eclipse

Solar Eclipse Viewing & Safety Guide — What to Expect

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Eclipse Viewing Key PointsNever view the Sun with the naked eye for any length of time; doing so can cause irreversible eye damage or blindness. …