Alan Stern, associate administrator for the Science Mission Directorate at NASA Headquarters in Washington, will host a media teleconference at 1 p.m. EDT, Wednesday, Aug. 1. Stern will discuss plans for NASA's Cassini mission to make an unusually close encounter with Saturn's geyser-moon Enceladus and provide project updates for a variety of science flight programs. Planetary and astrophysics program developments also will be discussed.

Briefing participants also will include:

• James Green, director, Planetary Division, Headquarters
• Jon Morse, director, Astrophysics Division, Headquarters

Media interested in participating in the teleconference should call 888-577-8992. International media should call 630-395-0359. The passcode is "science."

Live audio of the teleconference will be streamed at: http://www.nasa.gov/newsaudio

Audio replays of the teleconference will be available until Aug. 3 by calling 866-352-7722. International media should call 203-369-0079.

Supporting images and graphics for the teleconference will be posted at: http://www.nasa.gov/formedia