How to read the Tonight page

Each city page shows:

- Darkness times: sunset, when the sky is dark enough to see satellites (end of civil twilight), fully dark (end of astronomical twilight), sunrise.
- Bright planets and where they are right now.
- Satellite passes in the next 12 hours that are both sunlit and above a dark horizon, with start time, peak time, maximum height and the path (for example SW → NE).
- Starlink trains predicted from objects launched in the last 30 days.
- Launches in view: scheduled launches within 1,500 km in the next 24 hours, with the direction to the pad.
- Aurora odds from the current planetary Kp and your latitude.
- Meteor showers active tonight.

Predictions come from orbital elements refreshed every six hours; they are good to about a minute for the next few days. Clouds are a forecast and can be wrong; look anyway.