What would happen to an unprotected human being in the vacuum of space? Would they explode?
See the answer on the NASA Goddard Space Flight Center `Imagine the Universe!’ web page. • Can you help me figure out what time of day a first quarter, full, or third quarter moon rises, and when it crosses the meridian? The easiest way to solve these problems is to draw pictures of the Sun, Moon, and Earth, and a person on the Earth. The trick is to remember that people are really tiny compared to the Earth, so can’t see over their horizon (a line tangent to the Earth where they are located), and that the Sun and Moon are *really* far away from the Earth, compared to the size of the Earth–essentially at infinity (so parallel lines intersect at the Sun or Moon). Also, remember that sunset (i.e., about 6 PM) occurs when the location of the viewer is turning away from the Sun, and the Sun is on the observer’s horizon. This is easiest to explain with a picture: s o- m Imagine the “o” is the Earth, the “s” is the Sun, the “m” is the Moon, and the “-” is a person on the Earth. The person i
