Archive: November 2015

The hammer and feather on the Moon

hammer-feather_198x198The American astronaut David Scott (* 1932) conducted an interesting experiment on the Moon, toward the end of the  Apollo 15 mission in July/August 1971. In front of a running camera, he dropped a hammer (2.9 lb) and a falcon’s feather (0.06 lb), just to prove Galileo Galileis’ (1564–1641) thesis that objects fall to the ground with the same speed, regardless of their mass, provided the air resistance does not slow them down, as it is the case on Earth. On our planet, this experiment  could only be demonstrated in a vacuum. [read more]

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The »golden handle« of the Moon

golden-handle_198x198When the sunlight appears on the Moon’s surface in a flat angle, interesting lighting effects are created, due to the mountains and valleys, which can be observed quite well from the Earth. A well-known effect is the so called »golden handle«. This is when the Jura Mountains (»Montes Jura«) are illuminated 4 to 5 days before the full moon and appear as a bright arc, in front of the still darkened Sea of Showers (»Sinus Iridum«) of the Mare Imbrium. This is reinforced by the fact that the boundary of light and shadow, which is called »terminator«, runs directly through this area. [read more]

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