AU Mic b in orbit (IMAGE) Dartmouth College Caption An illustration of the planet AU Mic b shedding its atmosphere as it orbits its sun, AU Microscopii. Credit Image by NASA, ESA, Joseph Olmsted, STScI. Usage Restrictions No restrictions. License Public Domain Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.