Visible to the naked eye, Mercury should be seen in the western sky at twilight ... The planet will be at its greatest elongation from the sun. Elongation is the angular distance between a ...

In the evenings that follow, Mercury will diminish — slowly at first — in brightness, but it will also be reaching its greatest elongation ... appearing low in the western sky and setting ...

I pick out North America’s celestial highlights for the weekend (which also applies to northern hemisphere mid-northern ...

An eastern elongation implies that the planet will be visible after the Sun has set in the west (an "evening star"), while a western elongation ... the inner planet Mercury is only rarely visible to ...