Listen Live: Constellation Update At 4 p.m.

NASA will host a media teleconference today to update reporters on progress being made in Project Constellation, the agency's bid to return American astronauts to the moon by 2020.

The Ares rockets, Orion spacecraft and Altair lunar lander all are being developed by the project office, which is based at Johnson Space Center in Houston.

The teleconference will begin at 4 p.m. and you can click this link to LISTEN LIVE.

The teleconference participants will be:++Doug Cooke, deputy associate administrator of the Exploration
Systems Mission Directorate at NASA Headquarters in Washington.

++Jeff Hanley, Constellation program manager at NASA's Johnson Space
Center in Houston.

++Steve Cook, Ares projects manager at NASA's Marshall Space Flight
Center in Huntsville, Ala.

++Mark Geyer, Orion project manager at NASA's Johnson Space Center.

ABOUT THE IMAGE: Click to enlarge and save this NASA artist's concept of an Ares 1 rocket being built up in High Bay No. 3 of the Kennedy Space Center Vehicle Assembly Building. You can also click the enlraged image to get an even bigger, more detailed view. NASA aims to start assembling the rocket for the Ares 1X test flight in the high bay after first-stage solid rocket booster segments are delivered to KSC from Utah manufacturer ATK.