Star Walk – 5 Stars Astronomy Guide is an augmented reality app for discovering over 200,000 stars, planets, constellations and galaxies in the night sky. It’s been updated to include a stargazing calendar that displays celestial events that are visible from your location. It also explains each event and allows you to set a reminder in iCal for the ones you wish to see. Additionally, the app has a new comet tracking feature that allows you to follow comets, including Halley, PANSTARRS, Lemmon and ISON. ISON will be visible this November, 2013.