Find your next imaging window: cloud toward your target, seeing, transparency, moonlight and dark hours, hour by hour, for any location worldwide. Choose where you observe to see which targets are worth setting up for. View the seven-night forecast in your browser without an account or anything to install.
An ordinary forecast gives the cloud straight above you, but your telescope points somewhere else. With a target chosen, The Quiet Sky follows your line of sight through the low, mid and high cloud layers and reads the forecast where it crosses each one: a few kilometres away for a target high in the sky, over 100 km away for one near the horizon. Sightline cloud requires an account.
Each hour of the next seven nights is scored from 0 to 100. Cloud and twilight set the ceiling; the Moon, transparency, seeing, wind and dew take points off; rain caps it. Your rig changes the weights, so a narrowband filter cares far less about the Moon. Each night gets one word for its best stretch: Quiet, Settled, Broken, Unsettled or Closed in.
Search over 13,000 objects, see when each one is well placed, and preview the framing at your rig's field of view on a real survey image. Compose frames and mosaics in the Sky Atlas, plan a night across several projects, and export target lists to N.I.N.A. and ASIAIR.
Sign in to save your sites and set alerts for clear windows. It works for any location worldwide, with each site's own timezone, Moon and darkness times. The FAQ explains current access and pricing.
Trees, roofs and balconies hide part of the sky. Sign in to trace your skyline with your phone's camera, draw it on the chart from a computer, type it in or import a horizon file, and every score, window and suggestion counts only the hours your target is really in view. A small safety margin allows for not setting up in exactly the same place every night.