As the title says, If I were standing in the spot where the battle of Hoth took place in The Empire Strikes Back and I looked upwards, what planets would I be able to see in the sky?
Probably two venus-sized points of light (Jhas and Ordaj) in addition to the local star (also named Hoth).
According to The Empire Strikes Back, Hoth was the sixth planet in the system which means that there's the potential for five (or fewer, or possibly more) additional objects in the sky aside from the weak local sun.
“My lord,” the general replied, choosing each word with care, “the fleet has moved out of light-speed. Com-Scan has detected an energy field protecting an area of the sixth planet in the Hoth system. The field is strong enough to deflect any bombardment.”
We also know from the game Star Wars: Uprising that there were two gas giant planets in the Hoth System, one named Jhas and another unnamed one (named as Ordaj in the Legends Essential Atlas). From the ground it seems likely that those would be visible at the very least.