midnight
Maps of the Moon therefore , being drawn from the image formed by the telescope , show the north in the lower part , and _ vice versa _ . Of this kind was the _ Mappa Selenographica _ , by Beer and Maedler , so often previously alluded to and now carefully consulted by Barbican . The northern hemisphere , towards which they were now rapidly approaching , presented a strong contrast with the southern , by its vast plains and great depressions , checkered here and there by very remarkable isolated mountains . -LSB- A -RSB- At midnight the Moon was full . This was the precise moment at which the travellers would have landed had not that unlucky bolide drawn them off the track . The Moon was therefore strictly up to time , arriving at the instant rigidly determined by the Cambridge Observatory . She occupied the exact point , to a mathematical nicety , where our 28th parallel crossed the perigee .