1. The Tenth Planet
... large body. The odds of this happening by chance are 1,700 to one, he says."(Pg. 76) Murray worked backwards from the 13 orbits and tracked Planet X to a region of the sky centered on the time constellation Delphinus, located in the northern sky. In a single snapshot, the telescope took in ... the Earth at near-clocklike 30 million-year intervals, causing mass extinctions. Whitemire and Matese came up with a theory that the killer comets are on a planet, not a star. The key evidence for periodic mass extinctions wound up on shaky ground, however, and Nemesis fell out of vogue. Now they a...
- Word Count: 992
- Approx Pages: 4
- Grade Level: High School