Sun  Universe 

NASA Mission Shows Evolution of Conditions at Edge of Solar System

New data from NASA's Interstellar Boundary Explorer, or IBEX, spacecraft, reveal that conditions at the edge of our solar system may be much more dynamic than previously thought. Future exploration missions will benefit in design and mission objectives from a better understanding of the changing conditions in this outer region of our solar system.

The IBEX has produced a new set of "all-sky" maps of our solar system's interaction with the galaxy, allowing researchers to continue viewing and studying the interaction between our galaxy and sun. The new maps reveal changing conditions in the region that separates the nearest reaches of our galaxy, called the local interstellar medium, from our heliosphere — a protective bubble that shields and protects our solar system.

In October 2009, scientists announced that the first map data produced by IBEX revealed an unpredicted bright ribbon of energetic neutral atoms emanating toward the sun from the edge of the solar system. This discovery was unexpected to scientists, because the ribbon of bright emissions did not resemble any previous theoretical models of the region.

The IBEX spacecraft creates sky maps by measuring and counting particles referred to as energetic neutral atoms that are created in an area of our solar system known as the interstellar boundary region. This imaging technique is required since this region emits no light that can be collected by conventional telescopes. This interstellar boundary is where charged particles from the sun, called the solar wind, flow outward far beyond the orbits of the planets and collide with material between stars. These collisions cause energetic neutral atoms to travel inward toward the sun from interstellar space at velocities ranging from 100,000 mph to more than 2.4 million mph.

This second set of all-sky maps, created using data collected during six months of observations, show the evolution of the interstellar boundary region. The maps help delineate the interstellar boundary region, the area at the edge of our solar system that shields it from most of the dangerous galactic cosmic radiation that would otherwise enter from interstellar space. The new findings were published this week in the Journal of Geophysical Research - Space Physics, a publication of the American Geophysical Union.

For More Information


Scott Wiessinger (UMBC): Video Editor
Scott Wiessinger (UMBC): Producer
Dave McComas (SwRI): Scientist
Nathan Schwadron (University of New Hampshire): Scientist
Please give credit for this item to:
IBEX Science Team/NASA/Goddard Space Flight Center

Short URL to share this page:


Data Used:
IBEX/IBEX-Hi/Differential Flux (0.9-1.5 keV)

This item is part of these series:
IBEX Videos
IBEX Sees Evolution in the Heliopause

Goddard TV Tape:
G2010-117 -- IBEX Media Telecon Sept 2010

SVS >> Heliosphere
DLESE >> Space science
SVS >> Sun
GCMD >> Earth Science >> Sun-earth Interactions >> Solar Activity >> Cosmic Rays
SVS >> Heliopause
SVS >> Heliophysics
NASA Science >> Sun
NASA Science >> Universe

GCMD keywords can be found on the Internet with the following citation: Olsen, L.M., G. Major, K. Shein, J. Scialdone, S. Ritz, T. Stevens, M. Morahan, A. Aleman, R. Vogel, S. Leicester, H. Weir, M. Meaux, S. Grebas, C.Solomon, M. Holland, T. Northcutt, R. A. Restrepo, R. Bilodeau, 2013. NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version