Astronomy Palace has an area of three hectares, making it the largest in terms of area among temples in the Yong'an region. Constructed with a northern temple floor plan, it is dedicated to General Xu Fuchun, a famous general from the Tang Dynasty. The construction of the temple began with the first decree for establishing a royal assembly, as bestowed by Xu Fuchun and his subordinate deities in Xia Gegeding, to patrol as the emperor's representative. After Minguo 48, local followers established a subsidiary shrine to provide offerings, construction commenced in March of Minguo 66, and the temple was completed in Minguo 68.
The front hall enshrines General Xu Fuchun, the Eastern Earth Guardian General, with flagpoles erected at the entrance of the grand gate to symbolize the heralding of the Eastern Earth Guardian General's palace. Behind the entrance, generals' subordinates are depicted leading celestial horses, indicating the readiness to "maintain preparedness for action" at any moment to address the sufferings of the people. The architectural style of Astronomy Palace adopts the traditional Chinese double-eaved hip-and-gable roof (known as the nine-ridge palace eave form in the Song Dynasty), designed and built by the renowned architect Mr. Xiao Wansheng for central temples. The courtyard's landscape features unique designs, while the eastern and western side corridors incorporate dragon motifs inspired by styles from different dynastic periods, distinguishing it from other temples with its special architectural character.
Every Lunar January 18th marks the anniversary of General Xu Fuchun and other deities enshrined at Astronomy Palace. Since its establishment in Minguo 69, the temple has hosted an annual calligraphy and sketching competition with the overarching themes of "spirit," "culture," and "leisure." These events, which combine temple culture with local humanistic spirit, include various activities beyond the competitions themselves, such as the exhibition of historical cultural exhibitions. Participants can also pass through the Safety Pass, cast lots for the imperial exam brush (the "King's brush"), which attracts many young people seeking divine aid for academic success in various examinations every year.