Neither one reflects the other; they're both blue for entirely different reasons.

Here's how to find the darkest skies for stargazing, including how to find an area with a low Bortle Number, apps and maps to find dark places, and a guide to dark sky parks and reserves.

"Dark Skies: A Practical Guide to Astrotourism" lists 35 sites around the world where people can see the stars, planets, and northern lights without light pollution from cities and towns.

It won’t make the sky as pristine as you’d find in Northern Arizona, but it’s a start. For more from Lifehacker, be sure to follow us on Instagram @lifehackerdotcom.

But when you combine the blue and violet light of the sky, the greenish tinge of blue and reddish tinge of violet are about the same, and wash out. So what we see is a pale blue sky.

Why is the sky blue? And why is the sky so many other colors? When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

If you can hear thunder, you are in danger. Don’t be fooled by blue skies. If you hear thunder, lightning is close enough to pose an immediate threat.

These images show how many more stars you can see in truly dark skies, outside of cities, suburbs, and other human light sources: Level nine classifies inner city skies, the worst for stargazing.

Find out what's up in your night sky during July 2025 and how to see it in this Space.com stargazing guide.