Cygnus ship sending abundance of science to International Space Station

Carrying more science research gear to the International Space Station than ever launched before by U.S. commercial logistics vehicles, the next Orbital ATK Cygnus freighter takes flight Tuesday. The cargo ship, ceremonially dubbed the S.S. John Glenn, will be boosted into orbit atop a United Launch Alliance Atlas 5 rocket from Cape Canaveral at 11:11 a.m. EDT (1511 GMT). A 30-minute launch window, spanning 15 minutes before and 15 minutes after the exact moment the station’s orbital plane passes over the Complex 41 launch pad, allows flexibility for the Atlas 5 to wait out unfavorable weather or seek resolution to a technical issue that could crop up in the countdown. More

(Source: SpaceFlight Now - Apr 16)