Authored by Nick Strobel, "Astronomy Notes" is an educational resource for introductory astronomy classes for undergraduates. This section discusses the sun and other stars. Topics discussed pertaining to the sun...

This Photojournal from NASA provides the first image of Earth captured from the outer solar system since Voyager 1 went to Neptune. In a magnified view, the moon is seen as a small protrusion. The article provides...

This simple animation illustrates how we observe the phases of Venus. As the planet revolves around the Sun, there are times of the year when it is observed completely lit up by the star and times when we only get it's...

Planet Quest is a website dedicated to keeping the public updated and informed about the recent discoveries of over one hundred extrasolar planets. This website provides information on NASA's missions, the technology...

This article discusses the history and future of planetary-protection restrictions. It begins by addressing the difficulty of discovering (possibly rare) life elsewhere, and then describes the potential difficulties of...