The Sky Tonight Update: May 17, Mercury at Greatest Western Elongation
- Shelby Bullion
- May 17, 2017
- 1 min read

This May 17, the planet Mercury reaches greatest western elongation of 25.8 degrees from the Sun. This is the best time to view Mercury since it will be at its highest point above the horizon in the morning sky. Look for the planet low in the eastern sky just before sunrise.
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