00:00International Observe, the Moon Knight, returns on September 19th, and to celebrate we put together
00:05a list of three breathtaking lunar targets that you can explore with the help of a telescope,
00:09ranging from a spectacular lunar mountain range to a 62 mile wall of shadow that cuts a straight
00:15line across the moon in the day after the first quarter moon phase. First up is the Montes Apennines,
00:20a majestic 373 mile wide mountain range whose peaks loom up to 3.1 miles above the southeastern
00:27shore of Mare Imbru, whose name translates from Latin to the Sea of Showers. The mountain range
00:31is particularly beautiful around the first quarter phase when sunlight strikes its eastern flank to
00:36cast deep shadows over an arc of the lunar surface 20 degrees north of the lunar equator on the day's
00:41side of the moon close to the terminator line. Next we're heading south on the hump for a mysterious
00:46dark line that appears on the lunar surface each month one night after the monthly first quarter
00:50phase when the half-lit lunar disc can be found shining above the southern horizon in the evening
00:55sky. The strange shadowy feature is known as Rupert's Rector, or the straight wall, a 62 mile long
01:01cliff face that formed where the lunar crust was pulled apart along a large-scale structural fault.
01:06Rupert's Rector can be found cutting between the shadow craters that pockmark the southeastern region
01:10of Mare Nubium near the day-night divide. Finally look to the eastern edge of the sunlit lunar disk
01:16just above the equator to glimpse the oval shape of the lunar sea Mare Crisium forming a vast cosmic
01:22scab on the surface of Earth's natural satellite. The dark feature was created after a colossal
01:27asteroid struck the moon excavating an enormous impact basin which later flooded with lava from
01:32the moon's interior. Those lava flows eventually hardened into a sunken basaltic plane that sits
01:371.1 miles below lunar sea level. And that's it for today be sure to head on over to space
01:43.com and read
01:43our international observe the moon night coverage to discover how you can participate in the annual event.
