General Carnivals of Space #546-547 – Urban Astronomer and Everyday Spacer February 9, 2018 TopSpacer Two space carnivals: Carnival of Space #546 at Urban Astronomer Carnival of Space #547 at Everyday Spacer Blog, etc. Astronaut photograph (ISS021-E-5375, 180mm, 10/12/2009) of impact crater Gweni Fada located in Chad. Impact craters observed on Earth provide an analog for scientists researching impact craters on Mars. Credit: NASA Share this:FacebookTwitterLinkedInTumblrMorePinterestPrintReddit Related