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5 December 2013 11:26 am ,
Vol. 342 ,
Dyslexia, a learning disability that hinders reading, hasn't been associated with deficits in vision, hearing, or...
Exotic, elusive, and dangerous, snakes have fascinated humankind for millennia. They can be hard to find, yet their...
Researchers have sequenced and analyzed the first two snake genomes, which represent two evolutionary extremes. The...
Snake venoms are remarkably complex mixtures that can stun or kill prey within minutes. But more and more researchers...
At age 30, Dutch biologist Freek Vonk has built up a respectable career as a snake scientist. But in his home country,...
Since arriving on the island of Guam in the 1940s, the brown tree snake ( Boiga irregularis ) has extirpated native...
An animal rights group known as the Nonhuman Rights Project filed lawsuits in three New York courts this week in an...
Researchers have been hot on the trail of the elusive Denisovans, a type of ancient human known only by their DNA and...
- 5 December 2013 11:26 am , Vol. 342 , #6163
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ScienceShot: Hot Jupiters Are Loners
7 May 2012 3:00 pm
In October 1995 when astronomers announced the first planet orbiting another star like the sun, Ted Koppel was so impressed he featured the discovery on Nightline. The new world was unlike any ever seen: a "hot Jupiter" bearing roughly the same mass as the sun's largest planet but lying so close to its star that it revolved every 4.23 days. However, Koppel may be less jazzed about a new announcement. In a study published online today in the Proceedings of the National Academy of Sciences, astronomers analyzing 63 hot Jupiters (depicted above) detected by NASA's Kepler spacecraft have found no planets comparable in size to Earth orbiting nearby. In contrast, many hot Neptunes—close-in giant worlds with roughly 5% of Jupiter's mass—do have planetary neighbors. The findings may mean that hot Jupiters assume their peculiar orbits after far-off giant planets kick them close to their suns. As the hot Jupiter dashes inward, its gravity ejects any smaller planets near the star, both explaining the absence of close planetary neighbors and suggesting that solar systems with hot Jupiters are unlikely to host life-bearing worlds resembling Earth.
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