Nasa has selected 16 payloads for flight aboard two suborbital reusable launch vehicles expected to begin test flights this year and a commercial parabolic aircraft, the U.S. space agency announced May 13. Twelve of the 16 payloads selected from a call for proposals Nasa's Flight Opportunities Program issued in December will fly aboard Zero Gravity Corp.'s Zero-G aircraft in midjuly during a week-long parabolic campaign from Houston's Ellington Field. Of the remaining four payloads, two will fly on suborbital reusable launch vehicle test flights and two will fly on both Zero-G and a suborbital vehicle.
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