DescriptionOp-astro-cover.svg English: Image of Openstax Astronomy textbook cover Date 16 October 2016 Source https://openstax.org/details/books/astronomy
DescriptionWikipedia 15 T-shirts Print 1.svg Русский: T-shirt Date 1 May 2016 Source Own work, design by AstroDesign Author ASTROD Other versions Wikipedia