Latest Mercury-Atlas 5 Stories
On February 20, 1962, John Glenn became the first American astronaut to orbit the Earth aboard Friendship 7. Now, 50 years later, we look back at that moment with admiration at what roads that mission was able to pave for our nation.
The MESSENGER spacecraft successfully completed its fourth orbit-correction maneuver today to increase the period of the spacecraft's orbit around the innermost planet from 11 hours 46 minutes to a precise 12 hours.
The MESSENGER spacecraft successfully completed its first orbit-correction maneuver on June 15 to reset its periapsis altitude â€” the lowest point of MESSENGERâ€™s orbit about Mercury relative to the planetâ€™s surface â€” from 506 kilometers to approximately 200 kilometers.