Observing the Messier Objects with a Small Telescope: girro 2014年1月26日 15 阅读 0 评论 未分类 Observing the Messier Objects with a Small Telescope: In the Footsteps of a Great Observer (The Patrick Moore Practical Astronomy Series) Hardcover: 304 pages Publisher: Springer (October 31, 2007) Language: English ISBN-10: 0387853561 代发服务PDF电子书10元立即求助