Mass has different definitions. The moon’s orbit confirms two are equivalent
Mass is mass is mass. Physicists have three different definitions of mass, all thought to...
Mass is mass is mass. Physicists have three different definitions of mass, all thought to...
NOORDWIJK, THE NETHERLANDS — Life might arise in the darkest of places: the moon of...
Skywatchers in southern South America were treated to a total solar eclipse on Monday (Dec....
Updated to clarify the limitations of Galileo’s measurements. The solar system is rife...
Astronomers have taken a step towards understanding how the Moon might have formed out of...
Still image from a cross section of a 3D simulation run by researchers investigating how...
Editor's note: You can follow NASA's announcement of water on the moon live here. For the...
Photo of a nearly full Moon shining brightly on the Earth’s atmosphere, taken from the...