xalioth

Accuracy is good for present time (i.e. +- a few days from now), but degrades quickly with time (for planets, satellites etc..). For the online version we can't afford to use full planetary models (like in the desktop version) as it would be too much data to download at startup.

In theory, the location should be auto-detected, if you allow your browser to send it

Thanks, that would be a nice contribution!

One of the goal for the web version is to allow displaying sky observations yes (we are working on it). Not specifically from the VO, but it could as well.

Hey that's one of the nicest compliment I ever got from a user/contributor, thanks! (Fabien from Stellarium team)