Nightbase — Free astronomy observation logger, interactive star map and deep-sky object catalog
Log in to get astro weather for your location.
Tonight's sky — weather, twilight and visible objects
Showing London/Greenwich as a default — sign in or share your location for your sky.
Explore the night sky — interactive star map and deep-sky catalog
Explore the night sky in real-time. Navigate constellations, find deep-sky objects, and plan your observations.
Why Nightbase
Plan tonight
See what's well-placed from your site, plan around weather and the moon, and pick targets that suit your scope.
Log what you see
Quick or detailed observation entry, sketches, audio notes, photos — all yours, exportable, never sold.
Earn observer ranks
Pass exams, log enough sessions, and unlock Bronze, Silver, and Gold Observer certificates.
Discover — tonight's targets, weekly digest and weather forecast
Tonight
Best objects to observe tonight
Sky Digest
Curated nightly briefing with top targets and events
Weather
Astronomy weather forecast
Earth and Moon
Solar System — Sun, Moon, planets, comets, eclipses and meteor showers
Reference — constellations, astronomy exams and interactive simulators
What's new
Sign in to log observations, create plans, and manage equipment.
Accounts are free — no subscriptions, no advertising, no analytics.
