The 10 most intriguing extrasolar planets
The first planets outside our solar system were spotted in 1990, in orbit around a dying, radiation-spewing star very different from our Sun. In the years since, scientists have turned up even stranger worlds. Starting in 1995 with 51 Pegasi b - the first extrasolar planet discovered - planet hunters have found alien worlds that run the gamut in terms of diversity. Here are some record holders and oddballs.