A superior conjunction occurs when Mercury is on the opposite side of the Sun from Earth, making it difficult to observe as it appears behind the Sun.
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BSL
Astronomy
(British Sign Language) 
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BSL available
at ENS optical
Astronomy Telescope
retailers at Birmingham
Facetime
Derek can help with it. -
British Sign Languages
Interest to learn
BSL Basic for fun?
o
More information
for your BSL journey. -
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BSL available
at Roboscopes
Facetime
Derek can help with it.