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Voyager Data May Reveal Trajectory Of Solar System; Possible Presence Of Companion Star

Date:
May 31, 2006
Source:
Binary Research Institute
Summary:
Nearly 30 years after launch, the two Voyager spacecraft are still operational and returning useful data. In their early years they produced some of the first close up images of the large outer planets. Now as the two vehicles, flying in slightly different directions, near the edge of the solar system, they are providing clues on the shape of heliosphere, and quite possibly, the direction of the solar system through local space.

Artist's view of the Voyager spacecraft design.
Credit: Image courtesy of NASA

Nearly 30 years after launch, the two Voyager spacecraft are still operational and returning useful data. In their early years they produced some of the first close up images of the large outer planets. Now as the two vehicles, flying in slightly different directions, near the edge of the solar system, they are providing clues on the shape of heliosphere, and quite possibly, the direction of the solar system through local space.

The heliosphere, generated by the Sun, is sort of the cocoon in which the solar system rides. It has been suspected for several years that it is not spherical but more egg shaped. Voyager 1 recently reached one edge and it is estimated it will pass into interstellar space at about 12.4 billion miles from the Sun. It was recently announced that Voyager 2 has reached its more southerly edge, sooner than expected. It is now believed it will reach interstellar space at about 10.5 billion miles. This reveals that the heliosphere is not a sphere after all, but is more of a comet shape.

According to Cal Tech's Ed Stone, the former director of NASA's Jet Propulsion Laboratory and a Voyager chief scientist, the shape of the bubble is determined by what is pressing on the solar system from the outside, meaning the shape and force of interstellar gases. That is one explanation. Another put forth by Walter Cruttenden of the Binary Research Institute is that local gases are fairly uniform and the shape derives from the trajectory of the solar system through local space -- possibly in its orbit around a companion star. While this latter explanation is far more speculative, it is not unlikely that local interstellar gases are relatively homogeneous and therefore the shape of the heliosphere may be at least partially due to motion of the solar system.

Voyager 1 and 2 are expected to remain active for several more decades. In that time we should gain a better understanding of the motion of the solar system and its surrounding neighborhood.



Story Source:

The above story is based on materials provided by Binary Research Institute. Note: Materials may be edited for content and length.


Cite This Page:

Binary Research Institute. "Voyager Data May Reveal Trajectory Of Solar System; Possible Presence Of Companion Star." ScienceDaily. ScienceDaily, 31 May 2006. <www.sciencedaily.com/releases/2006/05/060531081518.htm>.
Binary Research Institute. (2006, May 31). Voyager Data May Reveal Trajectory Of Solar System; Possible Presence Of Companion Star. ScienceDaily. Retrieved July 23, 2014 from www.sciencedaily.com/releases/2006/05/060531081518.htm
Binary Research Institute. "Voyager Data May Reveal Trajectory Of Solar System; Possible Presence Of Companion Star." ScienceDaily. www.sciencedaily.com/releases/2006/05/060531081518.htm (accessed July 23, 2014).

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