Based on the search results, it is not possible to determine which planet is under the moon tonight. The search results provide information on visible planets and night sky for September, October, and November, but they do not provide information on the specific date of tonight. However, the search results do provide information on visible planets and night sky for specific dates in September and October. For example, on September 19, Uranus and Neptune were visible in the night sky. On October 29, Venus and the bright star Spica were nearby, and the unlit portion of the moon exhibited a lovely glow. Therefore, if the specific date of tonight is known, it may be possible to determine which planet is under the moon.