Free map live
NASA VIIRS+cloud/moon

FIND YOUR BEST NIGHT
UNDER THE SKY

DarkestHour combines light pollution, clouds, moon, seeing, transparency, aurora and satellite windows into one simple night-sky planning check.No signup to inspect one spot. Pro is for saved places, nearby-site comparison, clear-window alerts and serious observing decisions.

No signup
Map and tonight check stay free.
Source-led
VIIRS, weather and moon data surfaced in plain English.
Pro path
Save sites, compare windows and plan serious sessions.
Live decision preview
DarkestHour Pro planning panel Pro
GO
Nearest dark zone
Bortle 2.8
48 min drive
Cloud window
21:40–01:10
Moon below horizon
Sky quality
21.6 SQMExcellent
Cloud risk
12%Clear window
Moon impact
LowBelow horizon
ISS / Starlink
2 passesWeather-filtered
Unlock Pro: drive finder + alert beta

UNDERSTANDING LIGHT POLLUTION

Artificial skyglow currently hides 99% of the stars visible to the human eye. In a modern city, you might see 50 stars. In a true Dark Sky sanctuary, you see 4,500+. Our mission is to help you find that horizon again.

EXPLORE THE MAP

WORTH-IT-TONIGHT TOOLKIT

Free map tools bring users in. Pro saves serious sky-watchers from wasting rare clear nights.

Free Map

Explore global light pollution, Bortle/SQM context and nearby dark zones before choosing a destination.

Sky Window

Combine darkness, moon, cloud and seeing into one practical go / wait / plan-the-session answer.

Pro Alerts

Save favourite places and get clear-sky, moon, aurora, meteor, ISS and Starlink windows when they matter.

High-intent planning lanes

Stop checking six apps.

Dark maps, aurora apps, satellite trackers and planetarium tools all solve fragments. DarkestHour combines them into one practical night-sky planning check.

Stargazing Updates

FREE STARGAZING GUIDE

New to stargazing? Sign up for our free beginner's guide. Learn how to find the darkest skies, pick your first telescope, and capture your first star photo.

No spam, ever. Unsubscribe anytime.

PLANS & PRICING

Free map and event hooks stay wide. Pro sells the higher-value answer: which night, place and sky window is actually worth planning around.

Free Plan

CORE FREE PLANNING LAYER

$0/FOREVER
  • Global Light Pollution Map
  • Bortle Scale Ratings
  • Real-Time Weather
  • One-spot tonight checks
  • Ad-supported
START FOR FREE

No credit card required • ads may display after consent

RECOMMENDED

PRO ACCESS

Nearby-site comparison, best-night scan and saved-alert beta priority for serious sky sessions

$4.99/MONTH

$49.99/ANNUAL (CATCH ONE GOOD WINDOW AND IT PAYS FOR IT)

MONTHLY OR ANNUAL SUBSCRIPTION • CANCEL ANYTIME

  • Decision engine inputs:
  • Cloud, moon, seeing and transparency checks
  • ISS & Starlink pass windows filtered by sky conditions
  • Aurora / Kp alerts with cloud and moon context
  • Best night this week
  • Best nearby viewing sites: top 3 candidates
  • Saved-place clear-sky alerts beta priority

PICK THE RIGHT NIGHT.

Start with tonight's sky check, then use the map and Pro tools when a clear window is actually worth planning around.

CHECK TONIGHT FIRST