In addition, an astronomical chart records the positions of Jupiter, Saturn, and Venus, and it notes that Saturn orbits the Sun once every 30 years. All of these observations almost perfectly match the findings of modern science.
而《五星佔》裡，則記錄木星、土星與金星運行的位置，還有土星繞太陽一周需時三十年，都和現代的觀測估算相差不大，可知漢代天文學的發達。