"A NASA spacecraft successfully slipped into orbit around Mars Friday, joining a trio of orbiters already circling the Red Planet after a critical firing of its engines.
Scientists cheered after the Mars Reconnaissance Orbiter emerged from the planet's shadow and signaled to NASA's Jet Propulsion Laboratory that the maneuver was a success.
'Oh I am very relieved,' project manager Jim Graf said minutes later. 'It was picture perfect.'
The two-ton spacecraft is the most sophisticated ever to arrive at Mars and is expected to gather more data on the Red Planet than all previous Martian missions combined."