Observed arrival · 2026-10-10
Nyx plans a darker-sky night
Nyx compares the night sky across 63 U.S. national parks, scoring each park and night from 0 to 100.
○Open
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✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Stargazers planning trips to U.S. national parks
- Worth noticing
- A weakest-factor cap can limit the score; beyond a few forecast days, cloud estimates use each park’s usual conditions.
Field notes
The score combines four inputs—moonlight, cloud cover, estimated Bortle-class sky glow, and hours of astronomical darkness—and lets its weakest factor cap the result. For the coming week, the page says it compares three weather models; farther out, it uses each park’s usual cloud patterns and labels the forecast accordingly. Park alerts appear alongside scores, so access conditions are part of the trip-planning picture.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
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