Tuesday, May 19, 2009

'Kuiper cliff' may indicate Earth-sized 10th planet

There's a point where the Kuiper belt (all the icy, rocky debris beyond Pluto) suddenly comes to an end. "The density of space rocks drops off so steeply… the only answer seems to be a 10th planet… that has swept the area clean of debris." (New Scientist)

Scientist believe what's out there is more than a dwarf planet (like Pluto, Sedna or Quaoar), but "a massive object, as big as Earth or Mars."

Pound360 wonders if anyone would care. Discovering planets is such a routine thing these days. It might get a mention on the Nightly News, but if you quiz people six months later about the number of planets in the Solar System, nobody would have a clue.

4 comments:

Anonymous said...

*9th, not 10th.

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I started pound360 to channel my obsession with vitamins, running and the five senses. Eventually, I got bored focusing on all that stuff, so I came back from a one month hiatus in May of 2007 (one year after launching Pound360) and broadened my mumblings here to include all science.