Home . ... Jeff Valenti . ... I am an associate astronomer with tenure at the Space Telescope Science Institute (STScI). My research interests include exoplanets, T Tauri stars, stellar atmospheres, and stellar magnetic fields. I lead the Mission Engineering and Science Analysis (MESA) group, which facilitates communication between science and engineering. valenti @ stsci.edu +1-410-338-2622 3700 San Martin Dr., Baltimore MD 21218 ...