Newly discovered asteroid orbits in union with Earth

Newly discovered asteroid follows the Earth as it orbits the Sun, and has been doing it for a quarter million years.

Currently, three other horseshoe companions of the Earth are known to exist but, unlike 2010 SO16, these linger for a few thousand years at most before moving on to different orbits. Also, with an estimated diameter of 200–400 metres, 2010 SO16 is by far the largest of Earth’s horseshoe asteroids. The team has already used the Las Cumbres Observatory’s Faulkes Telescope in an on-going campaign to track the object and refine its orbit further. “It is not that difficult to spot with a medium-sized professional telescope”, says Dr Asher. “It will remain as an evening object in Earth’s skies for many years to come.”

Caving in Druid Cave, Cheat Canyon, West Virginia

An evening pause: Caving in Druid Cave, Cheat Canyon, West Virginia. The caver is David Riggs. The videographer is caver Aaron Bird. The caver who arrives at the end with the ATV is caver Brian Masney. All are world class cavers, with whom I’ve had the honor of caving.

The video is nicely done, and gives an excellent and accurate feel for modern cave exploration and techniques. Watch especially how the rigging allows David to climb past the waterfall while on rope and hardly get wet.

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