The frontier beyond Neptune

Article Abstract:

The Kuiper belt, discovered in 1992, is a limited population of small, nearly-circular objects beyond Neptune. The belt has a nearly circular orbit that remains almost unchanged since the outer planets were formed. Some 40 Kuiper-belt objects have been detected to date, using ground-based telescopes. Calculations suggest that there could be a total population of some 70,000 objects. Research suggests that Kuiper-belt objects were ejected by Neptune as it formed, sending some planets into enduring orbits with semimajor axis and high eccentricity.

Observations, Solar system, Neptune (Planet)

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Almost heaven

Article Abstract:

Cowee Valley of North America is a repository of a variety of gems and minerals, sometimes yielding treasures such as native rubies. At the Rose Creek Campground and Gem Mine, visitors search through gravel for native stones, including garnets, rhodolite garnets, star garnets and kyanite.

Description and travel, North Carolina, Mineral deposits, Mines and mineral resources, Mining, Valleys

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Romancing the rails

Article Abstract:

Rail officials and seasoned travelers share information about their favorite regularly scheduled daytime train rides: the Coast Starlight, the California Zephyr, the Southwest Chief, the Pioneer, the Empire builder, the Capitol Limited and the Adirondack.

Railroads, Directory, Scenic railways

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