The DOGULEAN Planetarium 2.2
Space Traveler Edition
Requirements and Recommendations
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 Windows or Linux, Chrome, Opera, Firefox, Phoenix,
DuckDuckGo and MS Edge are all ok. Firefox does not perform
as well as the others. The planetarium does not
support Internet Explorer.
On Mac OS X, Chrome, Opera, Firefox, and Safari should all
perform about equally well. On some platforms, Safari has a
problem that stars, labels or lines behind a planet will show
through it. This appears to be a problem with the WebGL
implementation in some versions of Safari. If you run into
it, try Chrome.
A reasonably high-definition monitor should suffice, but
higher definition is better. A big UHD TV is excellent!
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 10 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. 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
with the web server using cookies. It uses the browser's
persistent storage to save your control settings between sessions.
What If I Don't Have a Mouse With Two
Buttons and a Wheel?
To use the Planetarium, you need a pointing device that can imitate
the following things that you can do with a standard mouse that has
left and right buttons and a mouse wheel:
The following are descriptions of how to do this with various
pointing devices I know about.
- Left-click: Click the left mouse button.
- Left-drag: Hold the left mouse button down and drag the mouse.
- Right click: Click the right mouse button.
- Turn the mouse wheel.
- Left-click: Press down on the touchpad with on finger and release.
- Left-drag: Press down with one finger and either move that
same finger or glide another finger over the touchpad. I find
that gliding with another finger is usually easier.
- Right-click: Press down with two fingers.
- Turn the mouse wheel: Touch two fingers to the mouse pad and
glide them on the pad. If the touchpad is part of a laptop,
the direction to glide is toward you or away.
Mice That Don't Have Obvious Buttons
The ones I am familiar with work as follows.
- Left-click: Press the left side of the mouse and release.
- Left-drag: Press and hold the left side of the mouse and
drag the mouse.
- Right click: Press the right side of the mouse and release.
- Turn the mouse wheel: Stroke the middle of the mouse.
Touchscreens are not officially supported, but the following may
work on platforms other than iOS. iOS is really not supported.
- Left-click: Touch with one finger.
- Left-drag: Touch one finger and drag.
- Briefly touching a star or planet
will display its info bar for three seconds.
- Right click: Long touch with one finger.
- Mouse wheel: Touch the screen with two fingers and pinch them
together or spread them apart.
Sliders don't work very well and neither do the little up and
down arrows in number entry boxes, but if you don't use the
control panel much anyway, you may do all right.
The discussion of touchscreens, above, applies.
- iOS is not supported.
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. Sliders do not work very
- The Planetarium is not designed for smaller formats like
smartphones. If you want functionality like Stargazing mode
so you can identify stars when you look at the sky, there
are many apps that do that. Use one of those.