Extremely good choices, you want one of these every game, they make the game easier.
Ancestor Worship:
A lot has been said, I'll just add that the pantheon is boring and doesn't interact with your start or civilization in any meaningful way.
God of the Open Sky:
There are a lot of starts where other pantheons make sense (like on plains olives, Springtime looks good, and there is plenty of wheat and corn so Sun makes sense), but even without pastures this guy kills the other options. Its messed up by hills and desert, which is the only reason its not as ubiquitous as ancestor worship.
1


per 2 plains/grassland alone would be a worthy pantheon, the pasture thing alone is minor and secondary. This can provide like 1/4th of your culture in medieval era, the scaling is better than God-King. There's actually some anti-synergy here, because sheep on hills won't work towards the plains/grassland bonus.
Goddess of Renewal:
You can reach like 3


and 5

from this pantheon. Its just ridiculous, who cares if jungle is somewhat weak in food or hammers, while the other guy spends hundreds of hammers on libraries you just enjoy already having the science. Way too much science and it gives culture too. I think the design is off too, the market bonus makes little sense here. It also contributes a lot to the whole 'never chop/improve bananas' thing. It requires a lot of micromanaging as 1 forest 1 jungle won't give the bonus.
God of Stars and Sky:
I'm putting him here because others like him, but I haven't used it in a while. I can obviously see how OP having like +7 culture in your capital from the pantheon would be but I haven't actually encountered it ever. This could be a map script thing.