HaloSat Lauches as Part of Cargo Aboard Antares Rocket (image) NASA/Goddard Space Flight Center Share Print E-Mail Caption HaloSat launched from NASA's Wallops Flight Facility in Virginia on May 21, 2018, aboard a Cygnus spacecraft from Orbital ATK, now known as Northrop Grumman, on the company's Antares rocket. HaloSat will study the halo of gas around the Milky Way as part of the search for the universe's missing matter. Credit NASA/Aubrey Gemignani Usage Restrictions None Share Print E-Mail 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.