Should be fairly straight forward if you have another PC or laptop with WiFi or a USB WiFi dongle, although 50m would need direct line of sight or have an intermediate WiFi bridge, or something with decent in built aerials.
You would run something like RealVNC Server on the telescope PC/Laptop and simply leave it as it is, then run RealVNC on a 50m distant PC/laptop and then the distant PC becomes a duplicate screen, keyboard and mouse of telescope PC
If there isnt much going on then you could even use a smart phone or iPad - but the novelty will soon wear off and you'll want proper control !
Lots of other programs options can do the same thing
If you have really graphic intensive software - eg a planetarium package or real time video then you will find the screen updates to be a little glitchy because the screen updates arent instantaneous - it works OK, but laggy.
If you arent watching a planetarium screen or video then you would hardly know the difference.
Otherwise you could use a 50m long network cable instead - then its almost the same as being there.
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