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
Explore the night sky — interactive star map and deep-sky catalog
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
Record — observation sessions, logs and quick entry
Sessions
Log your observing nights
Observations
Detailed records per object
Quick Add
Log a single observation without a session
Organize — object lists, observation plans and equipment
Lists
Curate your favorite objects
Plans
Observation checklists with progress
Equipment
Manage your gear
Solar System — Sun, Moon, planets, comets, eclipses and meteor showers
Reference — constellations, astronomy exams and interactive simulators
Constellations
Exams
Articles
Kepler's Laws
Three-Body Problem
Spacecraft Trajectories
Milky Way Galaxy
Exoplanets
Distance Explorer
Optics Simulator
Collimation
ISS
Polar Lights
Light Pollution
Resources
Apophis 2029
Horoscope
Sign in to log observations, create plans, and manage equipment.
Accounts are free — no subscriptions, no advertising, no analytics.
