The Moon is not airless: its exosphere holds helium, neon and argon at roughly one quadrillionth of Earth’s molecular density, and a single lander can briefly dominate the gas nearby

A whisper of gas surrounds the Moon, so thin that a single spacecraft can temporarily become its most dominant feature. The post The Moon is not airless: its exosphere holds helium, neon and argon at roughly one quadrillionth of Earth’s molecular density, and a single lander can briefly dominate the gas nearby appeared first on Space Daily .