Ad Astra is the quarterly magazine of the National Space Society (NSS).

The magazine came into being following the merger of the L5 Society and the National Space Institute which became the NSS in 1987.

The magazine was briefly published by Space.com until 2010, then reverted to internal publication by NSS contractors.

Regular columnists include John F. Kross, Rod Pyle, Pascal Lee, Melissa Silva, Jordan Strickler, Jeff Stepp, Frank White (of the Overview Effect), Dale Skran, Nancy Atkinson, Elizabeth Howell, and Leonard David.

It is published in print as well as digital editions, and is available by subscription, by membership in the National Space Society, by membership in NASA Federal Credit Union, and in retail channels throughout the U.S. and Canada (primarily bookstores and newsstands).