You don't need a telescope
to start.
Sky Log is where every astronomer's story lives — from the first Milky Way shot taken with a phone, to a lifetime spent hunting objects in the NGC. Choose your challenge, log your observations, and share every image with a community that understands what it took to get it.
Six challenges. Hundreds of objects. One journal.
Your challenges
SKY.LOG.CHALLENGESMoonshot
The Moon is the most photographed object in the sky and the least systematically documented. Moonshot challenges you to identify and image every named feature on the lunar surface — craters, mare, mountain ranges, rilles, and bays — using an interactive map built from NASA's Lunar Reconnaissance Orbiter imagery.
Lunar imaging rewards patience over aperture. A modest telescope and a steady atmosphere will reveal more detail than any deep-sky target. The challenge scales with the Moon's phases — different features emerge at different terminator angles, giving you new targets every lunation.
Moonshot is a lifelong project hiding in plain sight. You've been looking at the targets every clear night. Pin your captures directly to the surface of the Moon.
Know what's up before you set up
Sky Log calculates rise and set times for every object in your active challenges based on your location. See tonight's best targets, track lunar interference, and plan sessions days ahead — so you never waste a clear night on the wrong target.
Every object. Every image. Every night.
Your Sky Log builds a permanent record of your time under the sky. Your public profile shows challenge progress, completed milestones, and every image you've logged — a portfolio that grows with every clear night you get out.
The social astronomy photo gallery
Every image you log to a challenge flows into Darkroom — the community gallery organised by object, not just date. See how other observers have captured the same targets, compare equipment setups, and build a public portfolio that tells your story through the sky.
Pick your first challenge.
The rest will follow.
Start with a camera and Open Sky. Add a telescope catalog when you're ready. Every plan includes What's Up Tonight, Darkroom access, your public profile, and Night Simulator VR Sync.
View plans & pricing →