MISSION CONTROL CENTER STS-67 STATUS REPORT # 25 Tuesday, March 14, 1995, 5 p.m. CST Endeavour's astronauts continued to study the stars and fielded questions from reporters as their astronomical research flight neared its conclusion. Red team astronauts John Grunsfeld and Ron Parise gathered more ultraviolet data from celestial targets as Pilot Bill Gregory aimed the Shuttle toward deep space to allow the trio of ASTRO-2 telescopes to collect their galactic information. All the while, Commander Steve Oswald completed final data takes with the Middeck Active Control Experiment --- MACE ---- which has been operating in the middeck to collect information about the effect of vibrations on free-floating structures in microgravity for spacecraft engineers. Before turning in for an eight-hour sleep period, the Blue team astronauts, Wendy Lawrence, Tammy Jernigan and Sam Durrance, joined their colleagues in the traditional in-flight Crew News Conference, answering questions from correspondents on everything from astronomical research to the symbolism of the launching of U.S. astronaut Norm Thagard on a Russian rocket this morning to begin an historic three-month stay on the Mir Space Station. Earlier today, NASA's Mission Management Team decided NOT to extend Endeavour's flight beyond Friday's planned landing at the Kennedy Space Center. Citing the wealth of scientific data already acquired by the Shuttle's telescopes and the conservative approach being taken in slowly building up the length of time for orbiting crews, Mission Operations Representative Jeff Bantle said the decision to end Endeavour's journey on time was made after weighing numerous factors regarding a mission extension, both pro and con. Endeavour, meanwhile, continues to orbit the Earth in nearly flawless fashion, circling the planet every 91 minutes at an altitude of 185 nautical miles. The JSC Newsroom is open from 8 a.m.-5 p.m. weekdays, and from 9 a.m.-1 p.m. weekends throughout the mission. NASA's MSFC Newsroom is open from 6 a.m.-6 p.m. weekdays, and from 6 a.m.-2 p.m. weekends. MSFC's Code-A-Phone is updated twice daily and can be reached by calling 205-544-6397.