Sample Exchange for OASIS (IMAGE) NASA/Johnson Space Center Caption Roscosmos cosmonaut Oleg Kononenko conducts a sample exchange for the OASIS investigation. OASIS studies the unique behavior of liquid crystals in microgravity, including their overall motion and the merging of crystal layers known as smectic islands. Credit NASA Usage Restrictions None License Licensed content 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.