Ceiling, no, but remember you can keep following this ledge you are on, up in the near-total darkness near trhe ceiling. The reason you cannot sneak IN as such along the ledge is because it leads to the rock wall fifty feet ABOVE the entrance. It also winds past a number of the heavy guns emplacements so you would have to watch yourselves.
That is a spectacularly bad idea on many fronts. First of all, the entrance is a small metal protusion sticking out a ton of rock. You would be cutting through in plain sight.
Secondly, this is a Sith base. Trying to cut through it with a lightsabre is likely to be fraught with MANY difficulties. The Sith didn't play soft with this kind of thing- they wanted such intruders dead. The material will be very dense and slow to cut through, and likely lined with explosives. Good way to lose an arm, trying to cut through it.