This time we are looking on the crossword puzzle clue for: Shadow.
it’s A 6 letters crossword definition.
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Last seen on: –Eugene Sheffer – King Feature Syndicate Crossword – Sep 23 2022
–Wall Street Journal Crossword – August 24 2022 – Capital Growth
–Eugene Sheffer – King Feature Syndicate Crossword – Feb 23 2021
Eugene Sheffer – King Feature Syndicate Crossword – Mar 2 2020
Random information on the term “Shadow”:
The black drop effect is an optical phenomenon visible during a transit of Venus and, to a lesser extent, a transit of Mercury.
Just after second contact, and again just before third contact during the transit, a small black “teardrop” appears to connect Venus’s disk to the limb of the Sun, making it impossible to time the exact moment of second or third contact accurately. This led to the failure of the attempts during the 18th century transits of Venus to establish a truly precise value for the astronomical unit.
The black drop effect was long thought to be due to Venus’s thick atmosphere, and indeed it was held to be the first real evidence that Venus had an atmosphere. However, it is now thought by many to be an optical effect caused by the combination of the extreme darkening of the Sun’s disk near its apparent edge and the intrinsic imperfection of the viewing apparatus.
Observing Mercury simultaneously during its transit in May 1832 with different instruments, Bessel and Argelander noticed a black drop effect (without then using this term) with that instrument of less resolution. With precise measurements, a black drop effect was observed from outside the Earth’s atmosphere during the 1999 and 2003 transits of Mercury, although Mercury has no significant atmosphere.