Help Shape the Future of Space Exploration

Join The Planetary Society Now  arrow.png

Join our eNewsletter for updates & action alerts

    Please leave this field empty
Multimedia IconMultimedia

Building the J-2X Rocket Engine for the Return to the Moon

Use when no other thumbnail exists

Air Date: 11/05/2007
Run Time: 0:28:52

Listen to the full show:

Or Download mp3


  • John Vilja, Pratt and Whitney Rocketdyne's Program Manager


Support Planetary Radio

John Vilja is Pratt and Whitney Rocketdyne's Program Manager in charge of building the latest version of a rocket engine with a very distinguished legacy. He tells us about its development and how it will send us back to the Moon. Emily Lakdawalla's Q&A segment explores what little we know about asteroids that hit Mars. Bruce Betts updates us on the night sky as he and Mat Kaplan announce another prize in our fifth anniversary contest, along with a new space trivia question.

We're celebrating Planetary Radio's fifth anniversary.


No trivia contest spoilers please!

Leave a Comment:

You must be logged in to submit a comment. Log in now.
Facebook Twitter Email RSS AddThis

Planetary Radio Search


Advocate for Space!

Fifteen years ago, Society members and passionate space advocates like you helped save the Pluto mission. Now we can do the same for missions to Europa and Mars.

Join over 27,600 people who have completed their petition and consider a donation to support advocacy efforts.

Sign Our Petition

Space in Images

Pretty pictures and
awe-inspiring science.

See More

Selfies to Space!

Take flight with a selfie on LightSail™ in 2016!

Send a Selfie Now

Connect With Us

Facebook! Twitter! Google+ and more…
Continue the conversation with our online community!