The launch had been so successful that the other three were not needed. Later, on July 17, a three-second burn of the SPS was made to perform the second of four scheduled midcourse corrections programmed for the flight. The first colour TV transmission to Earth from Apollo 11 occurred during the translunar coast of the CSM/LM. The S-IVB stage separated and injected into heliocentric orbit 4 hours and 40 minutes into the flight. After transposition and jettisoning of the SLA panels on the S-IVB stage, the CSM docked with the LM. The command and service module, or CSM, Columbia separated from the stage, which included the spacecraft-lunar module adapter, or SLA, containing the lunar module, or LM, Eagle. 2 hours, 44 minutes and one-and-a-half revolutions after launch, the S-IVB stage reignited for a second burn of 5 minutes, 48 seconds, placing Apollo 11 into a translunar orbit. The way they came apart made the moon landing happen. It may guide you to all sorts of interesting features and finds.Components of Saturn V were discarded one by one. I recommend “The Chang’E-1 Topographic Atlas of the Moon” by Chunlai Li, Jianjun Liu, Lingli Mu, Xin Ren and Wei Zuo. But perhaps you want to study lunar topography, lunar morphology or lunar geologic structures? Maybe you want to know where is the water that’s hiding on the Moon. In any case I suspect that you nor I will be going hiking on the Moon anytime soon. So you get to know both where this mapping data came from and where other data may be found. Yet, in acknowledgement to lunar mapping already done, the authors included a very informative history of lunar mapping in the book’s preface. However, what’s most impressive for me is that this book shows that China is actively and capably adding to the scientific knowledge of space. Some additional information is at this link (in English). It’s apparently no mean feat, as the data came from a three-line array CCD stereo imager and resulted in the Mercator or Azimuthal projections. This includes specifications of the CCD camera, the characteristics of the probe’s orbit and the actual data processing. Nicely located in the preamble is a description of the data processing. This book is a re-issue in English of their initial production of 2012. I bet you’re wondering about where the data came from? The title says it all. It’s just like an atlas should be straightforward, simple and to the point. With this appendix, one can quickly and easily find the common lunar geographic features. It includes a list of 3,698 features placed on the maps with each feature having its name, its latitude, its longitude, its size in kilometres and its page. And they include the complete Moon surface, with a space resolution of 500m, a horizontal accuracy of 192m and vertical of 120m. There are 188 maps each on their own page all of them presenting an equal and fine finishing. How do I know of these descriptions? Simple. This book includes eleven of such nomenclatures.įor instance, there are the very dry Oceani, the Maria that hint at water courses, circular craters with astoundingly sharp edges and the knife edge rimae that slice along. But there are many other features that are at least interesting enough to warrant a particular nomenclature according to the International Astronomical Union. On the Moon we certainly don’t have to worry about water features. When I hike, I use maps to find interesting outlooks, amazing drop-offs or dry land between swamps. “Who’s going to sit down and read an atlas?” Good question, as I didn’t think I would either, but I definitely will use this book.įor me, a good atlas allows me to understand the shape of the land almost to feel the topology without actually being there.
0 Comments
Leave a Reply. |