Voyager 1, launched
in 1977 to explore the outer planets, has passed into a new region on
its way out of the solar system, scientists said on Wednesday.
The spacecraft, now more than 11 billion miles
(18 billion km) away, detected two distinct and related changes in its
environment on August 25, 2012, scientists write in paper to be
published in Geophysical Research Letters and emailed to Reuters on
The probe detected
dramatic changes in the levels of two types of radiation, one that stays
inside the solar system, the other which comes from interstellar space.
number of particles inside the solar system’s bubble in space, a region
called the heliosphere, dropped to less than 1 percent of previously
detected levels, while radiation from interstellar sources nearly
doubled, said astronomer and lead author Bill Webber, professor emeritus
at New Mexico State University in Las Cruces, New Mexico.
Scientists are not yet ready to say Voyager is in interstellar space, however
Written By: Irene Klotzcontinue to source article at reuters.com