The 7 days of 365 Days of Astronomy for week 21 2009. This week the shows include:

• May 21: Hanny's Voorwerp and the Galaxy Zoo by Ted Judah.
• May 22: Mars Exploration: A Quick History by Susan and Amanda Murph.
• May 23: A Cheap "Name a Star" Gift for Graduates by Bruce Palmquist.
• May 24: We're Expanding - and Accelerating! by Brains Matter.
• May 25: Tides: More Than What Floats Your Boat by Robert Morehead from Columbia Astronomy.
• May 26: Astronomer George Ellery Hale by Scott Kardel.
• May 27: Smiley, the Little Dish that Could by Christi Whitworth.