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Banded Iron Formation
Check out our online store - minerals, fossils, books, activities, jewelry, and household items!...more
Mercury's Poles
If Uranus is the "tilted planet", Mercury might be called the "upright planet". The spin axis of Uranus, which defines the locations of the planet's North and South Poles, is tilted by 98°. The spin axis...more
The Magnetic Poles of Mercury
Mercury has a weak magnetic field. Like Earth's magnetic field, Mercury's dipole field is tilted with respect to the planet's spin axis. This means that Mercury's magnetic poles and its geographic poles...more
Atmosphere of Mercury
Mercury has very little atmosphere. The planet's small size means that its gravity is too weak to hold down a normal atmosphere. There is a very thin atmosphere around the planet. Mercury's thin atmosphere...moreMagnetosphere of Mercury
Mercury is the only terrestrial planet other than the Earth that has a significant magnetic field (220 nT). This field, along with the planet's high density and small size relative to the Earth, indicates...moreShop Windows to the Universe
Meteorites are available in our online store, along with other minerals and fossils, books, activities, jewelry, and household items.
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Perspectives on Earth and Space Science Education
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Star Stuff: science news from an astronomer's perspective
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