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Monday Evening: Thin Crescent Moon Meets Mars Low in the West

A clear western horizon with binoculars offers the best chance during the brief twilight window.

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Look west about half an hour after sunset to catch the crescent Moon to the lower right of Mars, with Spica to the pair’s upper left. Credit: Stellarium/USGS/Celestia/Clementine

Overview

  • On Aug. 25, an 8% waxing crescent sits just below and to the right of Mars low in the western sky shortly after sunset.
  • The pair remains visible for under an hour before setting, creating a narrow viewing opportunity soon after dusk.
  • Plan to look 20–30 minutes after sunset from an unobstructed west-facing spot, with binoculars helpful for spotting Mars and for viewing lunar earthshine.
  • The scene lies in Virgo, with Mars about 7° to the Moon’s upper left and bright Arcturus emerging higher as the sky darkens.
  • The pairing kicks off successive evenings of arrangements as the crescent moves between Mars and Spica on Aug. 26, then beside Spica on Aug. 27, while Mars continues to fade toward solar glare by late November ahead of its next opposition on Feb. 19, 2027.