Earthsky Tonight—August 6, Mercury challenging, but

Courtesy of EarthSky A Clear Voice for Science www.EarthSky.org Mercury, the innermost planet of the solar system, is not often visible in our sky because it is always near the sun. When this inner world does become visible, it appears but briefly in the evening after sunset – or in the morning before sunrise. At present Mercury shines as an evening “star.” Today, Mercury reaches its greatest elongation for the entire year: 27 degrees east of the sun. (Your fist at an arm length ... Full Story