I am not sure how we'd verify any numbers, here.

[Not all astronomic data survived the Cataclysm...]

But stars are certainly easier to see; planets are only noticeable when they impact a star's orbit, or reflect its light. If there's other planets within this solar system, those are the likeliest - we've neither resources nor time to consider what else may be out there.

[The biggest threat appears to be parts of the moon, anyway.]