Questions on operation, handling and settings:

Why is the app file size so large?
The Universe2go+ app contains a huge database that provides you with the entire night sky, including countless objects, images and audio information. This makes the app large, but also completely independent of the mobile network. Because if you are observing from a high mountain, from the desert or from another location anywhere in the world, you often have internet no connection. The advantage: Universe2go+ will always work. There are absolutely no charges, and of course no roaming charges when abroad.

How do I align my smartphone in the passe-partout?
The passe-partout is made up of four different corners. The position depends on the size and model of your smartphone. Make sure that the screen is arranged as centrally as possible. Many Samsung models have a button on the side. You should therefore preferably position the small corners at the bottom or on the right hand side of the button, to avoid accidental operation of the button during use. In some cases on very large smartphones only the large outer frame of the passe-partout can be used. In such a case you must simply do without the corners.

Do I have to remove my smartphone from the hand-held planetarium to choose another mode, like Deep-Sky or Mythology?
No. You can control the app Universe2go+ without having to touch the screen of your smartphone. This is made possible by a new control technique via the sensors of your smartphone.

Can I stop the Audio Guide whenever desired?
If you do not want to listen to the explanation right to the end, just simply shake the Universe2go+ viewer lightly. The Audio Guide is then quit and you can focus on the next constellation or object.

How do I adjust my personal intraocular distance? And why is this important?

You should adjust your own intraocular distance to adapt your hand-held planetarium to your personal needs.

How does it work? By measuring and entering the intraocular distance: Use the PD-ruler to measure your personal intraocular distance and enter the measurements separately.

Why should I measure the intraocular distance?

The intraocular distance (or interpupillary distance) describes the distance of the pupil centre to the bridge of the nose. When looking through an optical instrument, both eyes should work together. Only when this distance is correct, can you enjoy relaxed viewing and optimally utilize the ability for stereo viewing. This measuring method enables accuracies of up to 1mm. Your advantage: The eye does not need to make any compensating movements and you can enjoy relaxed, far-distant viewing. And this even over a longer period of time. The Universe2go hand-held planetarium shows you the 3D-images in especially high quality. Overall, this method once again enhances the fun of observing.

Your PD measuring ruler is available here for downloading.

How shall I clean the Universe2go+ viewer?
The mirror should, under no circumstances, be cleaned with a cloth, it may be cleaned with compressed air. However, dust does not cause a disturbance, because the magnification is only 3.5x. The screens (polycarbonate) may be cleaned with a very soft cloth. Do not use any detergents.