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
The Planetary Report
A Halo of Moons On the Cover: Saturn wears a halo of four moons in this Wide-Angle Camera image taken by Cassini on August 18, 2004. The satellites visible in this picture are (clockwise from upper left): Tethys, Dione, Enceladus, and Mimas. This portrait was captured in visible red light at a distance of 8.9 million kilometers (5.5 million miles) from the planet. This black and white image was colored blue and gold. To view the original image, go to
NASA / JPL-Caltech / Space Science Institute

Volume 24, number 5
September/October 2004

A Halo of Moons

Download this issue as a PDF
(Planetary Society members only)


7 Robots, Not Humans, on Mars: Andy Ingersoll urges The Planetary Society to prioritize scientific exploration over human exploration of Mars.

8 Out of This World Books: Planetary Society books reviews are back by popular demand, just in time for the holiday season!

12 Cassini Captain's Log: 2004.184: Carolyn Porco, the Cassini Imaging Team leader, shares her personal account of how it felt to finally reach the lord of the rings and shows off some of the best images so far of the awe-inspiring ringed planet.


3 Members' Dialogue Robots or humans?

4 We Make it Happen! An update on SETI

6 Society News International Space University fellowships, Planetary Radio, and volunteer efforts

19 World Watch The future of the space shuttle and the International Space Station

20 Q&A How did the scarp around Olympus Mons form? How do the MER soil tests compare to Viking's results?

Facebook Twitter Email RSS AddThis

Essential Advocacy

Our Advocacy Program 
provides each Society member 
a voice in the process.

Funding is critical. The more 
we have, the more effective 
we can be, translating into more 
missions, more science, 
and more exploration.


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, YouTube and more…
Continue the conversation with our online community!