Help Shape the Future of Space Exploration

Join The Planetary Society Now Join Now!

Join our eNewsletter for updates & action alerts

   Please leave this field empty
Use when no other thumbnail exists

John Spencer

Latest Planetary Radio Appearance

Rocketplanes, Space Yachts and New Space Geeks at SpaceUp!

02/13/2012 | 0:28:50
Listen

Rocketplanes, Space Yachts and New Space Geeks at SpaceUp!

More Planetary Radio shows »

Latest Blog Posts

Less than 24 hours to New Horizons' Launch

Posted 2006/01/16 04:17 CST | 0 comment

New Horizons just experienced what we hope will be its last ever sunset on Earth. There will be three more sunsets to come.

Older blog posts »

Facebook Twitter Email RSS AddThis

LightSail - Flight by Light

Support LightSail!

In 2016, The Planetary Society’s LightSail program will take the technology a step further.

I want to help!

Featured Video

View Larger »

Space in Images

Pretty pictures and
awe-inspiring science.

See More

Join the New Millennium Committee

Let’s invent the future together!

Become a Member

Connect With Us

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