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inner planets |
Mercury, Venus, Earth (and moon), and Mars.
The inner planets, the closest to the Sun, are solid spheres of rock. Did you know that
the inner planets were constantly bombarded by asteroids and meteorites during their first 600 million years in existence?
That's why there are craters of varying sizes on the inner planets and their satellites.
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outer planets |
Jupiter (and moons), Saturn, Uranus, Neptune, and Pluto.
The outer planets, with the exception of Pluto, are large gaseous spheres with rings. |
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nebulae |
Nebulae are clouds of interstellar gas and dust. A nebula can be the remnant of a
supernova, or the birthplace of new stars. |
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miscellaneous |
Asteroids, spacecraft, comets, and galaxies. Did you know that
between the inner and outer planets is an asteroid belt? |
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Incredible pictures and interesting facts make these
space postcards the perfect greetings for anyone interested in astronomy. Take a tour through the
solar system in the planet sections. Visit magnificent coulds of interstellar gas and dust in the nebulae section. You'll find asteriods,
comets, and more in the miscellaneous section  |
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Click for an example card |
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