Skip to the tool

🌞 Daylight & Twilight Atlas

🌞 Daylight & Twilight Atlas

A whole year of light for any point on Earth, computed offline with the NOAA solar equations: sunrise, sunset, solar noon, the three twilights, golden hour, the compass bearing the sun rises on, how many minutes of daylight you gain tomorrow — and the ribbon chart that shows midnight sun and polar night appearing as you drag the latitude north.

night astronomical nautical civil daylight golden hour

More in Astronomy & Space

📡 Deep-Space Communications Planner Turn range into one-way light time, round-trip conversation delay, file-transfer finish time and free-space path loss…
🌗 Seasons & Earth's Tilt — 3D Explainer Drag to orbit a 3D Sun–Earth model and discover why seasons happen. It is not distance — it is the 23.4° tilt of…
🪐 3D Solar System Orrery A real 3D orrery of the whole solar system with true orbital mechanics — Kepler's equation is solved every frame, so…
🌫️ Airmass & Extinction Calculator How much of a star's light the atmosphere is stealing at any altitude, in which band, and how long you have before it…
🔋 Spacecraft Power & Eclipse Budget Balance solar generation, sunlit and eclipse loads, orbital timing and usable battery depth. See both the eclipse…
🌀 Astronaut Artificial Gravity Calculator Explore rotating habitats and short-arm centrifuges. Calculate floor gravity, rotation period, rim speed, target RPM…
📦 Astronaut Crew Consumables Planner Turn crew size and mission duration into a first-pass launch mass for water, food, oxygen and daily supplies. Every…
🪐 Astronaut Hohmann Transfer Planner Estimate the two burns, coast time, departure phase angle and repeat opportunity for a coplanar Hohmann transfer…

All 36 tools in Astronomy & Space →