Field notes / all guides

A little knowledge.
A bigger sky.

Practical guides for a night outside. Each one is written for this site, links to the primary sources it relies on, and assumes no specialist equipment.

THE CHANGING LIGHT−6° CIVIL−12° NAUTICAL−18° ASTRO
Planning · 5 min read

When dark is really dark.

Twilight, moonlight, and streetlights each change the view. Learn which one you can plan around.

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Full Moon photographed from Earth by Gregory H. Revera
Moonwatching · 4 min read
Photo: Gregory H. Revera · CC BY-SA 3.0

The Moon is not in the way.

Turn a bright night into a closer look at craters, ancient lava plains, and the changing line of sunlight.

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A MOVING POINT OF LIGHT
Satellite spotting · 4 min read

Catch the quiet flyover.

Understand elevation, direction, and why a satellite can disappear in the middle of a clear sky.

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Venus shining above dark sand dunes in twilight
Identification · 4 min read
Photo: NPS / Patrick Myers · Public domain

That bright “star” is probably a planet.

Where it sits, whether it twinkles, and what color it is. How to tell in under a minute.

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A bright meteor streaking across a starry sky above dark trees, with a faint glow on the horizon
Meteors · 6 min read
Photo: NASA / Bill Ingalls · Public domain

Meteor showers: which nights are worth staying up for.

A practical guide to the major annual meteor showers, what the hourly rates really mean, how moonlight changes a night, and how to watch without equipment.

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A pair of vintage binoculars resting on a leather case and a fur rug
Equipment · 5 min read
Photo: Clem Onojeghuo (via Unsplash) · CC0

Before a telescope, try binoculars.

How to read binocular numbers like 7x50 and 10x50, why exit pupil matters for night use, how to hold them steady, and the best first targets in the night sky.

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The stars of Orion in a deep blue night sky above a snowy field, a distant house and a line of trees
Orientation · 5 min read
Photo: W.carter · CC BY 4.0

Finding north and south with nothing but the sky.

How to find Polaris with the Big Dipper, find south with the Southern Cross and its pointer stars, and use Orion's belt to find east and west, in either hemisphere.

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People at an outdoor stargazing event, lit by red light, looking at an image on a phone next to a telescope
Photography · 5 min read
Photo: NPS / Marielle Scott · Public domain

Your phone can photograph the night sky. Mostly.

How to photograph the Moon, stars, constellations and the Milky Way with a smartphone: keeping it steady, locking focus, using night mode and long exposures, and editing afterwards.

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A group of adults and children wearing cardboard eclipse glasses, looking up at the sky
Safety · 5 min read
Photo: NASA Goddard Space Flight Center / Bill Hrybyk · CC BY 2.0

Watching a solar eclipse without hurting your eyes.

What makes eclipse glasses safe, why sunglasses and binoculars are dangerous, how to project the Sun with a pinhole, and when it is safe to look at totality. With notes on the 2 August 2027 total eclipse.

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How these field notes are written

Each field note starts with a practical question and checks its facts against published references such as NASA, the International Meteor Organization and national astronomy societies. Sources are listed at the end of every guide. Photographs are credited with their author and license. The calculations behind the planner are explained on the methods page.