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Two Wide-angle Imaging Neutral-atom Spectrometers (TWINS) and Interstellar Boundary Explorer (IBEX) 2

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This plot shows the orbits of NASA's IBEX (large oval) and TWINS (small ovals) spacecraft around the Earth. This plot shows the orbits of NASA's IBEX (large oval) and TWINS (small ovals) spacecraft around the Earth. The dots indicate IBEX one-day intervals, with the red segment representing IBEX's motion around the April 5, 2010, solar event. IBEX observed the