t SEA OF MOISTURE Robert Reeves The fractured crater Gassendi (top left) borders circular Mare Humorum. This plain displays many mare ridges (center), as well as several long rilles along its eastern and western borders. North is up. DETAILS: Celestron C8 with an Imaging Source DMK 41AU02.AS video camera. Mosaic of four panels, each consisting of a stack of multiple video frames. t LUNAR ALPS Howard Eskildsen Seen about two days after first quarter, tall peaks within Montes Alpes cast jagged shadows across the floor of Plato (top left). The mountain range continues to arc toward the southeast, terminating just before the flooded crater Cassini at bottom right. North is up. DETAILS: Explore Scientific ED152 refractor with an Imaging Source DMK41AU02.AS video camera. Stack of multiple video frames recorded through a Wratten 8 yellow filter. t T YCHO TO CL AVIUS Michael Wirths Two popular craters dominate the southern lunar highlands. Tycho, seen at bottom left, is a relatively young crater with terraced walls, while the weathered appearance of much larger Clavius (middle right) with its many overlapping craters hints at its older formation date. North is to the left. DETAILS: 18-inch Starstructure Dobsonian with a ZW Optical ASI174MM video camera. Stack of 1,200 video frames. s k y a n d t e l e s c o p e . c o m * J U LY 2 0 1 9 75http://www.DMK41AU02.AS http://www.skyandtelescope.com