National Aeronautics and Space Administration

Goddard Space Flight Center

Sun-Earth Day 2010: Ancient Mysteries, Future Discoveries

Technology Through Time

Over the centuries our collective knowledge about the Sun and its direct connection to our planet has continued to grow along with our desire to learn more! Technology Through Time invites you to join us in this journey of discovery and exploration by viewing our essays and supporting images.

2011 Technology Through Time Articles

Previous Year's Articles

What's Up?

Take a stroll through the cosmos with our new series of articles, "What's Up!". Each article will make a connection between our 'place in space' with mysteries found in the outer reaches of our known universe. To enhance your experience, we will include connections to additional activities, images and links.

2011 What's Up Articles

Previous Year's Articles


The alignment of Sun, Venus, and Earth comes in pairs that are eight years apart but separated by over a century. For example, the last pair happened in December 1874 and December 1882. The next pair would be in June 2004 and June 2012. After 2012, subsequent pairs will be in December 2117 and December 2125.