This is especially true in the northern hemisphere, where Mercury’s best elongations from the Sun come when the ecliptic makes a low angle to the horizon. It’s much less bright and it’s never up long outside of twilight. Because it can wander more than 45° from the Sun it can be up well after the end of twilight, and it’s visible for months at a time. Venus is easy to see – other than the Sun and the Moon it’s the brightest thing in the sky. Because Mercury and Venus are between us and the Sun, we only see them in the west after sunset and in the east before sunrise.
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