In August 1960, NASA launched its first communications satellite, Echo 1. Fifty years later, NASA has achieved another first by placing the ARTEMIS-P1 spacecraft into a unique orbit behind the moon, ...

James Van Allen discovered the two Earth-circling radiation belts that bear his name in 1958. The discovery, based on data from Explorer 1 (the first U.S. satellite), Explorer 3, and Pioneer 3, was ...

The combination of the slow rocking back and forth of the moon called libration brings into view three lunar maria or "seas" that are normally hidden around the backside - Mare Humboldtianum, M.

First, authors present the dynamical models and pursuit-evasion orbits used in this paper In this paper, the Earth-Moon rotating frame (EMR) and the circular restricted three body problem (CR3BP) is ...

Looking for a sky event this week? Check out our full Sky This Week column. May 25: Three planets after sunset Tonight, let's compare the appearance of the Moon to that of a week ago to see the ...

The Moon takes the same time (27.3 days) to rotate once on its axis as it takes to orbit the Earth. This is called synchronous rotation. Does this mean we always see the same face of the Moon, and ...

Trump Nominates Prosecutor Jay Clayton to Be Director of National Intelligence The U.S. Energy Revolution Is Iran’s Worst Enemy Audio By Carbonatix The libration of the moon, and changes in its actual ...

In August 1960, NASA launched its first communications satellite, Echo 1. Fifty years later, NASA has achieved another first by placing the ARTEMIS-P1 spacecraft into a unique orbit behind the moon, ...