Dictionary term
Atmospheric Extinction
Direct answer
Atmospheric Extinction is the reduction of celestial light through scattering and absorption along its path through the atmosphere.
It makes objects fainter, especially near the horizon.
It makes objects fainter, especially near the horizon.
A scientific orientation to scale, light, or motion; the article supplies the precise definition.Quick reference
- Use when
- Use wavelength, airmass, site, and current atmospheric conditions.
- Do not use it for
- A single extinction correction does not fit every color or night.
- Reference category
- Astronomy & Skywatching
- Related terms
- Astronomical Seeing, Atmospheric Transparency, Atmospheric Refraction, Airmass
The Chapter · Mystery School
Learn to read the sky for yourself
A mystery school of astrology with a worldwide chapter: letters on the chart and the soul, readings under one sky, and a rule of honesty about what the stars can and cannot say.
- The founding letter, with what the school studies and how it meets
- First word each season, when the doors open
- A seat at the gatherings, wherever in the world you are
Reading about Atmospheric Extinction? The chapter is where readers like you meet.
Founding circle · forming now
The list costs nothing. Word of the school and its gatherings, nothing else. Unsubscribe at any time.
The story behind Atmospheric Extinction
Photometric astronomy developed extinction coefficients to correct ground observations.
Atmospheric Extinction: fact and faith, kept distinct
This is a factual astronomy reference. It can support wonder at the created order without becoming a claim of fate, worship, or private revelation.
Atmospheric Extinction in numerology
Atmospheric Extinction is not a numerology claim. Any numbers attached to it should retain their ordinary scientific, calendrical, navigational, or historical meaning unless a separate symbolic interpretation is clearly labeled.
Why Atmospheric Extinction matters
It is required for calibrated photometry and realistic visibility estimates.
Atmospheric Extinction at work: an example
The same star appears dimmer at low altitude than near culmination.
Where interpretation stops
Atmospheric Extinction is presented as sourced astronomy, calendrical, Earth-science, cultural, or instrument-history reference. Definitions should distinguish measured phenomena from civil convention and historical interpretation, preserve location and time dependencies, and avoid turning factual sky data into a deterministic personal claim.
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.
- European Southern Observatory: Technology for Telescopes - Observatory reference for aperture, angular resolution, atmospheric seeing, mirrors, and telescope technology.
- Source
- The Great Almanac Dictionary
- Category
- Astronomy & Skywatching
- Also appears in
- Astronomy & Skywatching
- Aliases
- None listed
- Last updated
- 2026-07-16
Correct starlight for the atmosphere
Atmospheric Extinction in a book is one thing; Atmospheric Extinction in your own birth chart is your life. The Oracle casts your real chart and tells you what it means for your love, your work, and your year ahead, in conversation, free.
Speak with the OracleRelated terms
More in Astronomy & Skywatching
- Dark Nebula
- Geometric Albedo
- Light-Time Correction
- Orbital Inclination
- Protostar
- Skyglow
- Superior Conjunction
- Altitude and Azimuth
Common questions
What is Atmospheric Extinction?
Atmospheric Extinction is the reduction of celestial light through scattering and absorption along its path through the atmosphere.
How is Atmospheric Extinction used in an almanac?
Use wavelength, airmass, site, and current atmospheric conditions.
What should I avoid when interpreting Atmospheric Extinction?
A single extinction correction does not fit every color or night.
