Benjamin banneker saw astronomical patterns from which he could make calculations and predictions .
班哲明班尼卡会看出天文星象运行，加以估算及预测。
In his free time , banneker wrote the pennsylvania , delaware , maryland , and virginia almanac and ephemeris .
闲暇之时，班尼卡撰写有关宾州、德拉瓦、马里兰和维吉尼亚的农民历及星象历书。
The almanac included information on medicines and medical treatment , and listed tides , astronomical information , and eclipses calculated by banneker himself .
