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17 April 2014 12:48 pm ,
Vol. 344 ,
Officials last week revealed that the U.S. contribution to ITER could cost $3.9 billion by 2034—roughly four times the...
An experimental hepatitis B drug that looked safe in animal trials tragically killed five of 15 patients in 1993. Now,...
Using the two high-quality genomes that exist for Neandertals and Denisovans, researchers find clues to gene activity...
A new report from the Intergovernmental Panel on Climate Change (IPCC) concludes that humanity has done little to slow...
Astronomers have discovered an Earth-sized planet in the habitable zone of a red dwarf—a star cooler than the sun—500...
Three years ago, Jennifer Francis of Rutgers University proposed that a warming Arctic was altering the behavior of the...
- 17 April 2014 12:48 pm , Vol. 344 , #6181
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ScienceShot: One Last Crossing Before Interstellar Space?
4 December 2012 5:30 pm
SAN FRANCISCO, CALIFORNIA—The two Voyager spacecraft have been speeding toward the "edge" of the solar system for 35 years, and Voyager 1 is getting close, very close, to leaving the sun's solar wind behind and entering interstellar space. But scientists announced here on Monday at the annual fall meeting of the American Geophysical Union that Voyager 1 has yet another leg of its journey to complete before escaping the solar system. The good news is that the hardy spacecraft has discovered a new region of space that planetary scientists had no idea existed. Out far beyond the orbits of Neptune and Pluto, Voyager 1 in August entered a zone where the charged particles of the solar wind escape outward to interstellar space and at least some of the cosmic rays of interstellar space leak into the bubble of solar wind called the heliosphere that the Voyagers have been traveling through. But Voyager 1 magnetic field measurements show that the spacecraft is still traveling through the magnetic field of the sun and strictly speaking still within the heliosphere. So it could be months or years before Voyager 1 makes its escape.
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