Does the moon emit radiation? no, the moon only reflects radiation. yes, the moon has a temperature above absolute zero so it emits radiation. no, the moon has a temperature of absolute zero so it emits no radiation. no, the moon has no energy source to emit radiation from.

According to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does maria's voyage take according to samir?