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Outliers are observed data points that are far from the least squares line. They have unusual values and need to be examined carefully. Though an outlier may result from erroneous data, at other times, it may hold valuable information about the population under study and should be included in the data. Hence, it is crucial to examine what causes a data point to be an outlier.
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Related Experiment Video

Updated: Jul 1, 2026

A Real-world What-Where-When Memory Test
09:13

A Real-world What-Where-When Memory Test

Published on: May 16, 2017

Journey into the unknown beyond.

Len A Fisk1

  • 1Department of Atmospheric, Oceanic, and Space Sciences, University of Michigan, Ann Arbor, MI 48109-2143, USA. lafisk@umich.edu

Science (New York, N.Y.)
|September 24, 2005
PubMed
Summary
This summary is machine-generated.

Voyager 1 has crossed the solar wind termination shock, entering the local interstellar medium. This milestone reveals surprising data from the uncharted region beyond the Sun's influence.

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Area of Science:

  • Space Science
  • Heliophysics
  • Astrophysics

Background:

  • The solar wind is a stream of charged particles released from the upper atmosphere of the Sun called the corona.
  • The termination shock is the boundary where the solar wind abruptly slows down as it encounters the interstellar medium.

Purpose of the Study:

  • To report the crossing of the termination shock by the Voyager 1 spacecraft.
  • To describe the initial findings from the region beyond the termination shock.

Main Methods:

  • In-situ measurements by the Voyager 1 spacecraft.
  • Analysis of plasma and magnetic field data.

Main Results:

  • Voyager 1 successfully crossed the termination shock.
  • Unexpected conditions and phenomena were observed in the region immediately beyond the termination shock.
  • The data indicates a significant transition in the space environment.

Conclusions:

  • Voyager 1 has entered a new, unexplored region of space.
  • The crossing of the termination shock provides unprecedented insights into the heliosphere's boundary.
  • Further analysis of Voyager 1 data will illuminate the nature of the interstellar medium.