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Collection:
NASA Astronomy Picture of the Day Collection Collection NASA Astronomy Picture of the Day Collection Collection
Title:
The Sun's Heliosphere & Heliopause Title The Sun's Heliosphere & Heliopause Title
Explanation:
Where does the Sun's influence end? Nobody is sure. Out past the orbits of Neptune [ http://antwrp.gsfc.…] and Pluto [ http://www.nineplan…] extends a region named the heliosphere [ http://science.msfc…] where the Sun's magnetic field [ http://science.msfc…] and particles from the Solar Wind [ http://science.msfc…] continue to dominate. The surface where the Solar Wind [ http://antwrp.gsfc.…] drops below sound speed [ http://antwrp.gsfc.…] is called the termination shock [ http://web.mit.edu/…] and is depicted as the inner oval in the above computer-generated illustration [ http://www.cs.india…]. It is thought that this surface occurs as close as 75-90 AU [ http://neo.jpl.nasa…] -- so close that a Pioneer [ http://spaceproject…] or Voyager [ http://voyager.jpl.…] spacecraft may soon glide through [ http://www.srl.calt…] it as they exit the Solar System [ http://antwrp.gsfc.…] at about 3 AU/year. The actual contact sheet between the Sun's ions [ http://www-istp.gsf…] and the Galaxy's ions is called the heliopause [ http://www-pw.physi…] and is thought to occur at about 110 AU. It is depicted above as the middle surface. The Sun's heliopause [ http://web.mit.edu/…] moves through the local interstellar medium [ http://antwrp.gsfc.…] much as a boat moves on water, pushing a bow shock [ http://antwrp.gsfc.…] out in front, thought to occur near 230 AU. Explanation Where does the Sun's influence end? Nobody is sure. Out past the orbits of Neptune [ http://antwrp.gsfc.…] and Pluto [ http://www.nineplan…] extends a region named the heliosphere [ http://science.msfc…] where the Sun's magnetic field [ http://science.msfc…] and particles from the Solar Wind [ http://science.msfc…] continue to dominate. The surface where the Solar Wind [ http://antwrp.gsfc.…] drops below sound speed [ http://antwrp.gsfc.…] is called the termination shock [ http://web.mit.edu/…] and is depicted as the inner oval in the above computer-generated illustration [ http://www.cs.india…]. It is thought that this surface occurs as close as 75-90 AU [ http://neo.jpl.nasa…] -- so close that a Pioneer [ http://spaceproject…] or Voyager [ http://voyager.jpl.…] spacecraft may soon glide through [ http://www.srl.calt…] it as they exit the Solar System [ http://antwrp.gsfc.…] at about 3 AU/year. The actual contact sheet between the Sun's ions [ http://www-istp.gsf…] and the Galaxy's ions is called the heliopause [ http://www-pw.physi…] and is thought to occur at about 110 AU. It is depicted above as the middle surface. The Sun's heliopause [ http://web.mit.edu/…] moves through the local interstellar medium [ http://antwrp.gsfc.…] much as a boat moves on water, pushing a bow shock [ http://antwrp.gsfc.…] out in front, thought to occur near 230 AU. Explanation
Credit and Copyright:
P. C. Frisch [ http://astro.uchica…] (U. Chicago [ http://astro.uchica…]) et al. [ http://www.cs.india…], U. Indiana [ http://www.cs.india…] Credit_and_Copyright P. C. Frisch [ http://astro.uchica…] (U. Chicago [ http://astro.uchica…]) et al. [ http://www.cs.india…], U. Indiana [ http://www.cs.india…] Credit and Copyright
keyword:
Sun keyword Sun keyword
keyword:
Heliosphere keyword Heliosphere keyword
keyword:
Heliopause keyword Heliopause keyword
facet_where:
Pluto facet_where Pluto facet_where
facet_where:
Indiana facet_where Indiana facet_where
facet_where:
Chicago facet_where Chicago facet_where
facet_where:
Goddard Space Flight Center (GSFC) facet_where Goddard Space Flight Center (GSFC) facet_where
facet_where:
Jet Propulsion Laboratory (JPL) facet_where Jet Propulsion Laboratory (JPL) facet_where
facet_where:
Marshall Space Flight Center (MSFC) facet_where Marshall Space Flight Center (MSFC) facet_where
facet_what:
Voyager facet_what Voyager facet_what
facet_what:
Sun facet_what Sun facet_what
facet_what:
Pluto facet_what Pluto facet_what
facet_what:
Neptune facet_what Neptune facet_what
facet_what:
ACE facet_what ACE facet_what
original url:
http://antwrp.gsfc.… original_url http://antwrp.gsfc.… original url
UID:
SPD-APOD-ap020624 UID SPD-APOD-ap020624 UID

The Sun's Heliosphere & Heliopause

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The Sun's Heliosphere & Heliopause