Sky science
Atmospheric Refraction
Direct answer
Atmospheric Refraction bends incoming light through changing air density, raising apparent celestial altitude most strongly near the horizon.
It shifts apparent positions through the atmosphere.
$0 today, then $12/month after 7 days. Cancel anytime.
At a glance
- Found in
- Astronomy & Skywatching
- Related
- Atmospheric Transparency, Atmospheric Extinction, Airmass, Skyglow
It shifts apparent positions through the atmosphere.
A scientific orientation to scale, light, or motion; the article supplies the precise definition.
What does your own chart say about you?
Choose love, work or purpose. Your reading is written from your chart. Your reading uses your own birth details.
Walk through Alex’s whole example first
The Road of AgesSee the turning points of your whole life, from your birth date
See your road's shape
Prefer to explore first?
The Road of AgesThe turning points of your whole life, from your own chart
Walk my road
Free, by email
Your daily Almanac letter
One short letter at 7 each morning: the day’s theme read for your own chart, and one thing to do with it.
The story behind Atmospheric Refraction
Navigators and astronomers built refraction tables from repeated observations.
A one-minute story
The Wandering Stars
How the moving planets were watched, named and found, and what a transit is.
Why Atmospheric Refraction matters
Atmospheric Refraction affects rise and set times, astrometry, and horizon phenomena.
Atmospheric Refraction in practice: an example
The Sun appears above the geometric horizon near observed sunrise.
Where readings of Atmospheric Refraction go wrong
Refraction becomes variable and poorly modeled extremely close to the horizon.
Sources and editorial method
Research references used for this entry include:
- U.S. Naval Observatory: Astronomical Almanac Glossary - Definitions for astronomical coordinates, time, reference systems, and observable phenomena.
- U.S. Naval Observatory: Astronomical Data - Authoritative services for celestial positions, rise and set events, phases, and related calculations.
- Source
- The Great Almanac Dictionary
- Category
- Astronomy & Skywatching
- Last updated
- 2026-09-26
Compare apparent and geometric altitude
A definition tells you what it is; your own birth chart tells you what it means for you. The Oracle casts your real chart and answers for your love, your work, and your year ahead, in conversation. It opens with the 7-day Seeker trial.
Speak with the OracleRelated terms
More in Astronomy & Skywatching
- Declination Circle
- Globular Cluster
- Limiting Magnitude
- Orbital Period
- Pulsar
- Supernova
- Angular Resolution
From the reference page to your own chart
Every word here
is in your own chart.
- A personal reading about love, work or purpose, written from your chart
- A practical next step to consider
- It opens with 7 days free, with the AI Oracle and daily guidance
$0 today, then $12/month after 7 days. Cancel anytime.
Common questions
What is Atmospheric Refraction?
Atmospheric Refraction bends incoming light through changing air density, raising apparent celestial altitude most strongly near the horizon.
What do people get wrong about Atmospheric Refraction?
Refraction becomes variable and poorly modeled extremely close to the horizon.
Free, by email
The Almanac, in your inbox at 7
One short letter at 7 each morning: the day’s theme read for your own chart, and one thing to do with it.
