PUMAS (poo' • mas) -- is a collection of brief examples showing how math and science topics taught in K-12 classes can be used in interesting settings, including every day life.
The examples are written primarily by scientists, engineers, and other content experts having practical experience with the material. They are aimed mainly at classroom teachers, and are available to all interested parties via the PUMAS web site.
Our goal is to capture, for the benefit of pre-college education, the flavor of the vast experience that working scientists have with interesting and practical uses of math and science.
- Ralph Kahn
Pumas Editor and Founder
Can an Astronaut on Mars distinguish the Earth from its Moon? by David Stern and James Foster
Some day an astronaut will stand on Mars and look back at Earth. As Alfred, Lord Tennyson wrote Venus, Hesper, Were we native to that splendour or in Mars We would see the globe we groan in, fairest of their evening stars Could we dream of wars and carnage, craft and madness lust and spite Roaring London, raving Paris, in that peaceful point of light? Would we not, when gazing heavenward, at a star so silver-fair Yearn, and clasp the hands, and murmur: Would to God that we were there? But what exactly will one see from Mars? An observer on Earth needs a powerful telescope to see the tiny moons of Mars, Phobos and Deimos, but our own moon is much larger, and orbits at a greater distance. Could the unaided eye of an observer on Mars tell apart the Earth and its moon, at their greatest separation? One might ask a similar question about the four big moons of Jupiter, discovered by Galileo. They are about as big as our own moon. Could an observer on Earth distinguish any of them from their planet?
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We are always looking for neat examples of Practical Uses of Math And Science.