Story URL: http://news.medill.northwestern.edu/chicago/news.aspx?id=206596
Story Retrieval Date: 8/21/2014 1:02:28 PM CST
For the first time since 2004 -- and just the seventh time since it was first recorded in 1639 -- Earthlings had the chance to view a solar system rarity. Venus passed directly between the sun and Earth on Tuesday and could be seen as a small black disk moving across the sun's glowing surface. Astronomers say the phenomenon won't happen again until 2117.