Report: Voyager 1 Has Left Solar System

By Today, Usa | Tribune-Review/Pittsburgh Tribune-Review, March 20, 2013 | Go to article overview

Report: Voyager 1 Has Left Solar System


Today, Usa, Tribune-Review/Pittsburgh Tribune-Review


NASA's venerable Voyager I spacecraft may have become the first man-made object to leave the solar system, an astronomer suggests.

But NASA isn't buying it, at least not yet.

Scientists have been anticipating this moment for years, but the boundary between the edge of the solar system and what's called interstellar space has been something of a moving target. Astronomers say it's the point where the stream of electrically changed particles from our sun, called the solar wind, peter out and the cosmic rays from distant exploding stars coming from other directions become the dominant form of radiation.

The distances are somewhat mind-boggling. Pluto is about 3.7 billion miles from the sun. Voyager is now about 17 billion miles away, where any signal it sends takes 17 hours to reach Earth.

For several years, the spacecraft, launched in 1977, has been crossing through the edge of the "heliosphere," the bubble of charged solar particles created by the solar wind that shields our solar system from these distant galactic rays. The size of the heliosphere expands and contracts depending on the strength of the solar wind.

On Aug. 25, astronomers reported in the Geophysical Research Letters journal that galactic cosmic ray intensity suddenly doubled as measured by the spacecraft, indicating it had traveled beyond the protection of the solar wind. …

The rest of this article is only available to active members of Questia

Already a member? Log in now.

Notes for this article

Add a new note
If you are trying to select text to create highlights or citations, remember that you must now click or tap on the first word, and then click or tap on the last word.
One moment ...
Default project is now your active project.
Project items
Notes
Cite this article

Cited article

Style
Citations are available only to our active members.
Buy instant access to cite pages or passages in MLA 8, MLA 7, APA and Chicago citation styles.

(Einhorn, 1992, p. 25)

(Einhorn 25)

(Einhorn 25)

1. Lois J. Einhorn, Abraham Lincoln, the Orator: Penetrating the Lincoln Legend (Westport, CT: Greenwood Press, 1992), 25, http://www.questia.com/read/27419298.

Note: primary sources have slightly different requirements for citation. Please see these guidelines for more information.

Cited article

Report: Voyager 1 Has Left Solar System
Settings

Settings

Typeface
Text size Smaller Larger Reset View mode
Search within

Search within this article

Look up

Look up a word

  • Dictionary
  • Thesaurus
Please submit a word or phrase above.
Print this page

Print this page

Why can't I print more than one page at a time?

Help
Full screen
Items saved from this article
  • Highlights & Notes
  • Citations
Some of your highlights are legacy items.

Highlights saved before July 30, 2012 will not be displayed on their respective source pages.

You can easily re-create the highlights by opening the book page or article, selecting the text, and clicking “Highlight.”

matching results for page

    Questia reader help

    How to highlight and cite specific passages

    1. Click or tap the first word you want to select.
    2. Click or tap the last word you want to select, and you’ll see everything in between get selected.
    3. You’ll then get a menu of options like creating a highlight or a citation from that passage of text.

    OK, got it!

    Cited passage

    Style
    Citations are available only to our active members.
    Buy instant access to cite pages or passages in MLA 8, MLA 7, APA and Chicago citation styles.

    "Portraying himself as an honest, ordinary person helped Lincoln identify with his audiences." (Einhorn, 1992, p. 25).

    "Portraying himself as an honest, ordinary person helped Lincoln identify with his audiences." (Einhorn 25)

    "Portraying himself as an honest, ordinary person helped Lincoln identify with his audiences." (Einhorn 25)

    "Portraying himself as an honest, ordinary person helped Lincoln identify with his audiences."1

    1. Lois J. Einhorn, Abraham Lincoln, the Orator: Penetrating the Lincoln Legend (Westport, CT: Greenwood Press, 1992), 25, http://www.questia.com/read/27419298.

    Cited passage

    Thanks for trying Questia!

    Please continue trying out our research tools, but please note, full functionality is available only to our active members.

    Your work will be lost once you leave this Web page.

    Buy instant access to save your work.

    Already a member? Log in now.

    Search by... Author
    Show... All Results Primary Sources Peer-reviewed

    Oops!

    An unknown error has occurred. Please click the button below to reload the page. If the problem persists, please try again in a little while.