NASA will host a media teleconference at 1 p.m. EDT on Wednesday, June 3, to discuss the Hubble Space Telescope’s surprising observations of how Pluto’s moons behave, and how these new discoveries are being used in the planning for the New Horizons Pluto flyby in July.

Participants in the teleconference will be:

– John Grunsfeld, associate administrator for NASA’s Science Mission Directorate in Washington

– Mark Showalter, senior research scientist at the SETI Institute in Mountain View, California

– Douglas Hamilton, professor of astronomy at the University of Maryland, College Park

– John Spencer, scientist at Southwest Research Institute in Boulder, Colorado

– Heidi Hammel, executive vice president of the Association of Universities for Research in Astronomy in Washington

To participate by phone, reporters must contact Felicia Chou at 202-358-0257 or and provide their media affiliation no later than 10 a.m. Wednesday.

Audio of the teleconference will be streamed live at: 

For information about NASA’s Hubble Space Telescope, visit:

For information about Pluto and NASA’s New Horizons mission, visit: