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Mars Organic Analyzer
This illustration shows the relative positions of Earth and Mars at the
last six oppositions, when the Sun and Mars are on exact opposite sides
of Earth. The images of Mars show the planet's apparent relative size
at each opposition, as viewed by the Earth-orbiting Hubble Space Telescope.
Orbits of the inner planets are to scale. Credit: NASA, ESA, and Z. Levay (STScI)


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