Earth-Based Views of Mercury
Mercury, the planet closest to the Sun, is very difficult to observe from Earth. The planet is only one-third the diameter of the Earth, and can be studied by telescope only during the day or when the Sun is rising or setting. When Mercury is near the horizon, the interference created by Earth's atmosphere reduces the visibility even with the best telescopes.
|Earth-based telescopic photo of Mercury taken from Catalina Observatory 1.5 meter (61 inch) telescope.|
|Map of Mercury prepared by E.M. Antoniadi in the 1920's.|
|| Earth-based Views || A Day On
Surface Of Mercury || Mariner 10 Encounters
© 1998 National Air and Space Museum