There are at least three artists named 'Astra':
These are photos from concerts where Astra played, so they may be of other bands that played the concert as well.
Smile Prog Fest / Astra / Corima / Inner Ear Brigade Apr 18, 2015 Los Angeles, California, United States Uploaded by Stephenhuerta
ASTRA
Glitter Wizard / Astra / Artifact Feb 1, 2014 San Diego, California, United States Uploaded by Fantomos
artifact
Earthless
Enslaved / Earthless / White Hills / Astra Nov 10, 2012 West Hollywood, California, United States Uploaded by Fantomos
White Hills
Astra / Orchid Oct 17, 2009 San Francisco, California, United States Uploaded by Stephenhuerta