Starwatch: Mercury reaches greatest western elongation
by Stuart Clark from Science | The Guardian on (#6T3V8)
As this elusive inner planet orbits its furthest from the sun westwards, it will be visible in the morning sky
Get your Christmas started with a celestial achievement by tracking down the inner planet Mercury early in the morning.
Because of its tight orbit, Mercury never appears far from the sun. This makes it a challenging object to observe because it never appears in a fully dark sky, only close to the horizon during twilight.
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