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12 December 2013 1:00 pm ,
Vol. 342 ,
The iconic 125-year-old Lick Observatory on Mount Hamilton near San Jose, California, is facing the threat of closure...
Recent results from the Curiosity Mars rover have helped scientists formulate a plan for the next phase of its mission...
A new, remarkably powerful drug that cripples the hepatitis C virus (HCV) came to market last week, but it sells for $...
In pretoothbrush populations, gumlines would often be marred by a thick, visible crust of calcium phosphate, food...
Evolutionary biologists have long studied how the Mexican tetra, a drab fish that lives in rivers and creeks but has...
Victorian astronomers spent countless hours laboriously charting the positions of stars in the sky. Such sky mapping,...
In an ambitious project to study 1000 years of sickness and health, researchers are excavating the graveyard of the now...
Stefan Behnisch has won awards for designing science labs and other buildings that are smart, sustainable, and...
- 12 December 2013 1:00 pm , Vol. 342 , #6164
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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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