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 Mystery Solved On the Cover: This color composite of multi-spectral Landsat images reveals a huge, previously undetected crater in Egypt’s western desert, near the border with Libya. The outer rim of the double-ringed crater is 31 kilometers (about 19 miles) in diameter, making it the largest crater-shaped feature in the Great Sahara of North Africa.
Boston University Center for Remote Sensing

Volume 26, number 4
July/August 2006

A Mystery Solved

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

Features

6 Don't Abandon Science at NASA: Charles Kennel stresses that we need to commit to a strong sicnece rpogram at NASA to better know our planet and its place in the cosmos.

10 Veiled Crater in the Eastern Sahara: Farouk El-Baz and Eman Ghoneim tell their tale of discovering a massive impact crater in the Sahara.

16 Interstellar Dust: The Hunt for the Building Blocks of the Universe: Amir Alexander sheds some light on these elusive particles.

Departments

3 Members' Dialogue Metric vs. standard

4 We Make it Happen! Expedition to Europa on Earth; Shoemaker NEO grants

8 World Watch Save Our Science (S.O.S.) campaign update

20 Q&A How do we measure things on other planets? Does cold weather affect telescopes?

22 Society News Planetariums and Planetary Radio

Facebook Twitter Email RSS AddThis

JOIN THE
PLANETARY SOCIETY

Our Curiosity Knows No Bounds!

Become a member of The Planetary Society and together we will create the future of space exploration.

Join Us

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!