observational astronomy - Astro Photography HQ

Filters & Light Pollution

Measuring Your Sky’s Bortle Class and Selecting Filters

Tackling your sky’s Bortle class helps you choose the right filters, but discovering how to optimize your view depends on understanding your specific sky conditions.

AstroPhotographyHQ Team
December 11, 2025

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Vetted

3 Best Cooled Apochromatic Refractors of 2025 for Clearer Observations

Discover the top cooled apochromatic refractors of 2025 that promise sharper, clearer views—find out which models truly elevate your astronomical observations.

AstroPhotographyHQ Team
September 16, 2025

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Imaging Basics

Lost Images from the 1945 Trinity Nuclear Test Restored

Historical photographs from the 1945 Trinity nuclear test have been recovered and…

AstroPhotographyHQ Team
May 22, 2026

Polar Alignment

Polar Scope Reticles Explained: Stop Guessing Where Polaris Goes

Guides to polar scope reticles reveal essential tips that will elevate your…

AstroPhotographyHQ Team
May 21, 2026

Filters & Light Pollution

What you see in the Sun, is the Chicago skyline from the Indiana Dunes beach, across Lake Michigan. You can see it from 50 miles of distance due to a form of superior mirage, because the skyline is seen above where it’s actually located.

A rare optical phenomenon allows viewers at Indiana Dunes Beach to see the Chicago…

AstroPhotographyHQ Team
May 21, 2026

Imaging Basics

TIL that in 2024 a PhD student “accidently” discovered Valeriana – a Edinburgh sized hidden Mayan city in Mexico while browsing for data on the internet.

A Tulane PhD student uncovered a large ancient Maya city in Campeche, Mexico, using…

AstroPhotographyHQ Team
May 21, 2026