The DOGULEAN Planetarium 3.4.3

Requirements and Recommendations

Basic Requirements

You will need a browser that supports HTML5 and WebGL. That means your system needs to support OpenGL. A reasonably recent middle-of-the-line graphics processor should be good enough.
On Linux use the Wayland compositor protocol (XWayland), not X.org (xOrg). If your system supports Wayland, it is probably the default and you don't need to worry about this unless you have had to changed to xOrg for the benefit of some application that does not support Wayland (as I have – otherwise I would not know about this). X.org seems to use lot more graphics memory and you may end up needing to reboot, or at least log out and back in. On Fedora, which I run, there is a little settings icon when you log in. Selecting Gnome or Gnome Classic gives you Wayland.
On Windows or Linux, the browsers Chrome, Firefox, and MS Edge are all ok. The Planetarium does not support Internet Explorer or Opera.
On Mac OS X or iOS, versions 12.5.2 or later of Safari perform well. Some earlier versions 10.x.x and 11.x.x do not work. Chrome and Firefox should be ok if your devices performs adequately.
A reasonably high-definition monitor should suffice – higher definition is better.
A reasonable amount of memory. Allow at least 1GB for the Planetarium to use.

If the Planetarium Seems to be Eating Up Too Many of Your Machine's Cycles

Depending on the zoom and time rate you have set, the Planetarium may update the screen as often as 25 times per second. If that doesn't leave your machine enough cycles to do other things, then maybe you shouldn't run the Planetarium on that machine.

If you still want to run the Planetarium on that machine, try reloading the page. That will reduce zoom to at most 5 and the time rate to 1, so that the refresh rate will be at most once per second. After that, if your machine is still too slow, don't use it to run the Planetarium.

If your machine's performance is ok after reloading, then, in future, don't zoom in so much or set the clock rate so high. Your device is probably marginal for using the Planetarium.

A Note on Privacy

The Planetarium is a static web page running a large Javascript application. It does not communicate with the web server using cookies. It uses the browser's persistent storage to save your control settings between sessions.

Tablets, etc.

The discussion of touchscreens, above, applies.

iOS is not supported at present.
I have had reasonably good results with recent Android tablets. The main problem is that the browsers do not support number input elements with the little "up" and "down" buttons, so you have to type in the numbers.
I can actually use the Planetarium on my Android smartphone (Galaxy S8 with 2GB of memory), but it is not designed for such a small formats. If you only want an app on your smartphone to help identify the stars and planets you see in the night sky, there are many apps that you can use for that.

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