Bob Moler's Ephemeris Blog

Monday, October 18th.  The sun will rise at 8:01.  It’ll be up for 10 hours and 51 minutes, setting at 6:52.   The moon, half way from first quarter to full, will set at 4:41 tomorrow morning.

This evening the moon will be inviting to the telescope.  Depending on your optical arrangement, you will see the moon in different orientations.  When I describe the moon is describe it as seen in binoculars, right side up.  The Feature that looks like an arc of mountains called the Jura mountains that contain the Bay of Rainbows or Sinus Iridium will appear to the upper left of the moon. In a Newtonian reflecting telescope the moon appears upside down so Sinus Iridium appears to the lower right.  A printed moon map may only have to be turned upside down to match what you see. In a telescope with a diagonal mirror by the eyepiece gives a mirror image.  Whether it is upside down or not depends on the orientation of the eyepiece.