- It doesn't show a planet that I have scan.
It probably has the initial chunk already generated, should be able to drop entity from platform. - I can't find/build the telescope
It is locked behind AAI Transmission technology, it is only craftable in space platform, you need to send the materials to space, craft and place it on a platform. - Is there a way to not have that momentary blink on the screen when scanning (teleporting)?
No, that is a game limitation, the character must be physically on the surface for the first time. - Why can't I scan it multiple times?
It makes no sense; the only purpose of the scan is to generate the initial chunk to enable remote view. "Re-scan" to gain view is not planned