Copyright and Credits

Except where otherwise noted, material on this site is copyright 2019–2022 A. P. Howell.

Cover artists and illustrators are the primary exceptions, and I do my best to highlight the creators’ names.

The header images in rotation are from NASA.

Celestial Fireworks
Celestial Fireworks, NASA Goddard
Jupiter's Moons: Io, Europa, Ganymede, and Callisto
Jupiter’s Moons, NASA/JHU-APL/Southwest Research Institute
Frisbee Galaxy
Frisbee Galaxy, NASA Goddard
Omega Nebula (M17)
Omega Nebula (M17), MSFC
Seyfert Galaxy NGC 1566
Seyfert Galaxy NGC 1566, NASA Goddard
Nebula NGC 5189
Nebula NGC 5189, NASA Goddard