Astronomy
Explore the universe with our astronomy guides, constellations, and star map history.
10 Events That Changed the World — and the Sky People Saw That Night
From the Moon landing to the fall of the Berlin Wall, we calculated the exact sky visible during 10 historical moments. Star maps generated with OwnStarMap's astronomical algorithm.
April 10, 2026 · 9 min read
How Many Stars Can You See with the Naked Eye? The Exact Answer
The number of stars visible to the naked eye is approximately 9,096 according to the Hipparcos catalogue. In practice, you'll see between 100 and 4,500 depending on light pollution. Facts, tables and explanations.
April 10, 2026 · 9 min read
Light Pollution Map of France: How to Read Night-Sky Data
Learn how to read light-pollution maps for France, distinguish satellite radiance from the Bortle scale, and verify local observing conditions.
April 10, 2026 · 7 min read
Star, Planet or Satellite: How to Tell Them Apart in 30 Seconds
A bright point in the sky could be a star, planet, satellite or aircraft. The difference comes down to three criteria: twinkling, movement and colour. Here's how to identify them reliably.
April 10, 2026 · 8 min read
The Stars the Night You Were Born: What the Sky Looked Like
Discover what the night sky looked like the moment you were born. Learn how to find your birth constellation and see a scientifically accurate map of your birth sky.
April 9, 2026 · 6 min read
What Stars Are Visible Tonight? Your Guide to the Night Sky
Monthly guide to the stars, planets and constellations visible tonight. Summer Triangle, Winter Hexagon, current planets — everything you need to know, no telescope required.
April 9, 2026 · 7 min read
Best Stargazing Spots in the USA: Dark Sky Parks and Reserves
Discover the best stargazing destinations in America. From Cherry Springs to Big Bend, explore 130+ International Dark Sky Places across the United States.
April 8, 2026 · 12 min read
Best Stargazing Spots in Spain: Starlight Reserves and Dark Sky Destinations
Discover Spain's top stargazing destinations. From La Palma to the Teide Observatory, explore 17 Starlight Reserves and 60+ certified dark sky sites.
March 30, 2026 · 7 min read
What Stars Were Shining the Day I Was Born?
Learn which factors shaped the sky around your birth date, how to check it with a planetarium, and what a commemorative star map can represent.
March 20, 2026 · 7 min read