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The outermost two THEMIS spacecraft (Probes B and C) are on route to the Moon, where they will become the ARTEMIS mission's Probes 1 and 2 (red and green, respectively) , tasked with studying not only the tenuous cavity carved out by the Moon in the supersonic solar wind, but also reconnection, particle energization and turbulence in both the solar wind and the Earth's distant magnetotail at lunar distance. ARTEMIS stands for Acceleration, Reconnection, Turbulence, and Electrodynamics of the Moon's Interaction with the Sun.

Thanks to careful planning, sufficient fuel remained on both spacecraft at the successful completion of their primary mission to raise their apogees to lunar distance, where they could receive the multiple gravitational assists needed to fling the spacecraft first beyond the Moon and then assist them in entering in orbits that parallel that of the Moon at the L1 and L2 Lagrange points. Maneuvers in April 2011 enable the spacecraft to enter into prograde and retrograde lunar orbits (the 'braided' motion).

The direction of the Sun is indicated by the yellow arrow.

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Meanwhile, ARTEMIS-2 is about to receive its first lunar gravity-assist.", "width": 1280, "height": 720, "pixels": 921600 } } ], "extra_data": {} }, { "id": 352563, "url": "https://svs.gsfc.nasa.gov/3682/#media_group_352563", "widget": "Single image", "title": "", "caption": "", "description": "Now ARTEMIS-1 & 2 maneuver through the space beyond the Moon, but not for long.", "items": [ { "id": 333977, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 493948, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003600/a003682/ARTEMISdeluxeC.HR_Full.HD720p.02600.jpg", "filename": "ARTEMISdeluxeC.HR_Full.HD720p.02600.jpg", "media_type": "Image", "alt_text": "Now ARTEMIS-1 & 2 maneuver through the space beyond the Moon, but not for long.", "width": 1280, "height": 720, "pixels": 921600 } }, { "id": 333976, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 493947, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003600/a003682/ARTEMISdeluxeC.HR_Full.HD720p.02600_web.jpg", "filename": "ARTEMISdeluxeC.HR_Full.HD720p.02600_web.jpg", "media_type": "Image", "alt_text": "Now ARTEMIS-1 & 2 maneuver through the space beyond the Moon, but not for long.", "width": 320, "height": 180, "pixels": 57600 } }, { "id": 333975, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 493946, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003600/a003682/ARTEMISdeluxeC.HR_Full.HD720p.02600.tif", "filename": "ARTEMISdeluxeC.HR_Full.HD720p.02600.tif", "media_type": "Image", "alt_text": "Now ARTEMIS-1 & 2 maneuver through the space beyond the Moon, but not for long.", "width": 1280, "height": 720, "pixels": 921600 } } ], "extra_data": {} }, { "id": 352564, "url": "https://svs.gsfc.nasa.gov/3682/#media_group_352564", "widget": "Single image", "title": "", "caption": "", "description": "We move the camera back in, close to the Moon's orbit as ARTEMIS-1 & 2...", "items": [ { "id": 333980, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 493951, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003600/a003682/ARTEMISdeluxeC.HR_Full.HD720p.02840.jpg", "filename": "ARTEMISdeluxeC.HR_Full.HD720p.02840.jpg", "media_type": "Image", "alt_text": "We move the camera back in, close to the Moon's orbit as ARTEMIS-1 & 2...", "width": 1280, "height": 720, "pixels": 921600 } }, { "id": 333979, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 493950, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003600/a003682/ARTEMISdeluxeC.HR_Full.HD720p.02840_web.jpg", "filename": "ARTEMISdeluxeC.HR_Full.HD720p.02840_web.jpg", "media_type": "Image", "alt_text": "We move the camera back in, close to the Moon's orbit as ARTEMIS-1 & 2...", "width": 320, "height": 180, "pixels": 57600 } }, { "id": 333978, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 493949, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003600/a003682/ARTEMISdeluxeC.HR_Full.HD720p.02840.tif", "filename": "ARTEMISdeluxeC.HR_Full.HD720p.02840.tif", "media_type": "Image", "alt_text": "We move the camera back in, close to the Moon's orbit as ARTEMIS-1 & 2...", "width": 1280, "height": 720, "pixels": 921600 } } ], "extra_data": {} }, { "id": 352565, "url": "https://svs.gsfc.nasa.gov/3682/#media_group_352565", "widget": "Single image", "title": "", "caption": "", "description": "...maneuver to match their orbit with the orbit of the Moon. In this phase, they begin a gravitational dance between the lunar L1 & L2 Lagrange points.", "items": [ { "id": 333983, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 493954, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003600/a003682/ARTEMISdeluxeC.HR_Full.HD720p.02930.jpg", "filename": "ARTEMISdeluxeC.HR_Full.HD720p.02930.jpg", "media_type": "Image", "alt_text": "...maneuver to match their orbit with the orbit of the Moon. In this phase, they begin a gravitational dance between the lunar L1 & L2 Lagrange points.", "width": 1280, "height": 720, "pixels": 921600 } }, { "id": 333982, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 493953, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003600/a003682/ARTEMISdeluxeC.HR_Full.HD720p.02930_web.jpg", "filename": "ARTEMISdeluxeC.HR_Full.HD720p.02930_web.jpg", "media_type": "Image", "alt_text": "...maneuver to match their orbit with the orbit of the Moon. In this phase, they begin a gravitational dance between the lunar L1 & L2 Lagrange points.", "width": 320, "height": 180, "pixels": 57600 } }, { "id": 333981, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 493952, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003600/a003682/ARTEMISdeluxeC.HR_Full.HD720p.02930.tif", "filename": "ARTEMISdeluxeC.HR_Full.HD720p.02930.tif", "media_type": "Image", "alt_text": "...maneuver to match their orbit with the orbit of the Moon. In this phase, they begin a gravitational dance between the lunar L1 & L2 Lagrange points.", "width": 1280, "height": 720, "pixels": 921600 } } ], "extra_data": {} }, { "id": 352566, "url": "https://svs.gsfc.nasa.gov/3682/#media_group_352566", "widget": "Single image", "title": "", "caption": "", "description": "We fade in the magnetopause, the outer boundary of the Earth's magnetosphere. With each orbit of the Moon, the ARTEMIS satellites pass through the magnetosphere with the Moon, sampling the interaction of the Moon with the electromagnetic environment.", "items": [ { "id": 333986, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 493957, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003600/a003682/ARTEMISdeluxeC.HR_Full.HD720p.03323.jpg", "filename": "ARTEMISdeluxeC.HR_Full.HD720p.03323.jpg", "media_type": "Image", "alt_text": "We fade in the magnetopause, the outer boundary of the Earth's magnetosphere. With each orbit of the Moon, the ARTEMIS satellites pass through the magnetosphere with the Moon, sampling the interaction of the Moon with the electromagnetic environment.", "width": 1280, "height": 720, "pixels": 921600 } }, { "id": 333985, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 493956, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003600/a003682/ARTEMISdeluxeC.HR_Full.HD720p.03323_web.jpg", "filename": "ARTEMISdeluxeC.HR_Full.HD720p.03323_web.jpg", "media_type": "Image", "alt_text": "We fade in the magnetopause, the outer boundary of the Earth's magnetosphere. With each orbit of the Moon, the ARTEMIS satellites pass through the magnetosphere with the Moon, sampling the interaction of the Moon with the electromagnetic environment.", "width": 320, "height": 180, "pixels": 57600 } }, { "id": 333984, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 493955, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003600/a003682/ARTEMISdeluxeC.HR_Full.HD720p.03323.tif", "filename": "ARTEMISdeluxeC.HR_Full.HD720p.03323.tif", "media_type": "Image", "alt_text": "We fade in the magnetopause, the outer boundary of the Earth's magnetosphere. With each orbit of the Moon, the ARTEMIS satellites pass through the magnetosphere with the Moon, sampling the interaction of the Moon with the electromagnetic environment.", "width": 1280, "height": 720, "pixels": 921600 } } ], "extra_data": {} }, { "id": 352567, "url": "https://svs.gsfc.nasa.gov/3682/#media_group_352567", "widget": "Single image", "title": "", "caption": "", "description": "We now move the camera into a position to 'chase' the Moon, to better observe the maneuvers which will complete ARTEMIS' capture by lunar gravity. The ARTEMIS trails are transformed into a coordinate system which travels with the Moon. To see an illustration of how moving coordinate systems impact the visualization of trails, see \"LRO Transition from Earth-Centered to Moon-Centered Coordinates\"", "items": [ { "id": 333989, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 493960, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003600/a003682/ARTEMISdeluxeC.HR_Full.HD720p.03550.jpg", "filename": "ARTEMISdeluxeC.HR_Full.HD720p.03550.jpg", "media_type": "Image", "alt_text": "We now move the camera into a position to 'chase' the Moon, to better observe the maneuvers which will complete ARTEMIS' capture by lunar gravity. The ARTEMIS trails are transformed into a coordinate system which travels with the Moon. To see an illustration of how moving coordinate systems impact the visualization of trails, see \"LRO Transition from Earth-Centered to Moon-Centered Coordinates\"", "width": 1280, "height": 720, "pixels": 921600 } }, { "id": 333988, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 493959, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003600/a003682/ARTEMISdeluxeC.HR_Full.HD720p.03550_web.jpg", "filename": "ARTEMISdeluxeC.HR_Full.HD720p.03550_web.jpg", "media_type": "Image", "alt_text": "We now move the camera into a position to 'chase' the Moon, to better observe the maneuvers which will complete ARTEMIS' capture by lunar gravity. The ARTEMIS trails are transformed into a coordinate system which travels with the Moon. To see an illustration of how moving coordinate systems impact the visualization of trails, see \"LRO Transition from Earth-Centered to Moon-Centered Coordinates\"", "width": 320, "height": 180, "pixels": 57600 } }, { "id": 333987, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 493958, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003600/a003682/ARTEMISdeluxeC.HR_Full.HD720p.03550.tif", "filename": "ARTEMISdeluxeC.HR_Full.HD720p.03550.tif", "media_type": "Image", "alt_text": "We now move the camera into a position to 'chase' the Moon, to better observe the maneuvers which will complete ARTEMIS' capture by lunar gravity. The ARTEMIS trails are transformed into a coordinate system which travels with the Moon. To see an illustration of how moving coordinate systems impact the visualization of trails, see \"LRO Transition from Earth-Centered to Moon-Centered Coordinates\"", "width": 1280, "height": 720, "pixels": 921600 } } ], "extra_data": {} }, { "id": 352568, "url": "https://svs.gsfc.nasa.gov/3682/#media_group_352568", "widget": "Single image", "title": "", "caption": "", "description": "Looking down on the Moon far above its northern pole, we see both ARTEMIS spacecraft traveling around the Earth-Moon L1 point.", "items": [ { "id": 333992, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 493963, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003600/a003682/ARTEMISdeluxeC.HR_Full.HD720p.03730.jpg", "filename": "ARTEMISdeluxeC.HR_Full.HD720p.03730.jpg", "media_type": "Image", "alt_text": "Looking down on the Moon far above its northern pole, we see both ARTEMIS spacecraft traveling around the Earth-Moon L1 point.", "width": 1280, "height": 720, "pixels": 921600 } }, { "id": 333991, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 493962, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003600/a003682/ARTEMISdeluxeC.HR_Full.HD720p.03730_web.jpg", "filename": "ARTEMISdeluxeC.HR_Full.HD720p.03730_web.jpg", "media_type": "Image", "alt_text": "Looking down on the Moon far above its northern pole, we see both ARTEMIS spacecraft traveling around the Earth-Moon L1 point.", "width": 320, "height": 180, "pixels": 57600 } }, { "id": 333990, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 493961, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003600/a003682/ARTEMISdeluxeC.HR_Full.HD720p.03730.tif", "filename": "ARTEMISdeluxeC.HR_Full.HD720p.03730.tif", "media_type": "Image", "alt_text": "Looking down on the Moon far above its northern pole, we see both ARTEMIS spacecraft traveling around the Earth-Moon L1 point.", "width": 1280, "height": 720, "pixels": 921600 } } ], "extra_data": {} }, { "id": 352569, "url": "https://svs.gsfc.nasa.gov/3682/#media_group_352569", "widget": "Single image", "title": "", "caption": "", "description": "A couple of lunar orbits are completed in this configuration, passing into the Earth's magnetotail,", "items": [ { "id": 333995, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 493966, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003600/a003682/ARTEMISdeluxeC.HR_Full.HD720p.04259.jpg", "filename": "ARTEMISdeluxeC.HR_Full.HD720p.04259.jpg", "media_type": "Image", "alt_text": "A couple of lunar orbits are completed in this configuration, passing into the Earth's magnetotail,", "width": 1280, "height": 720, "pixels": 921600 } }, { "id": 333994, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 493965, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003600/a003682/ARTEMISdeluxeC.HR_Full.HD720p.04259_web.jpg", "filename": "ARTEMISdeluxeC.HR_Full.HD720p.04259_web.jpg", "media_type": "Image", "alt_text": "A couple of lunar orbits are completed in this configuration, passing into the Earth's magnetotail,", "width": 320, "height": 180, "pixels": 57600 } }, { "id": 333993, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 493964, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003600/a003682/ARTEMISdeluxeC.HR_Full.HD720p.04259.tif", "filename": "ARTEMISdeluxeC.HR_Full.HD720p.04259.tif", "media_type": "Image", "alt_text": "A couple of lunar orbits are completed in this configuration, passing into the Earth's magnetotail,", "width": 1280, "height": 720, "pixels": 921600 } } ], "extra_data": {} }, { "id": 352570, "url": "https://svs.gsfc.nasa.gov/3682/#media_group_352570", "widget": "Single image", "title": "", "caption": "", "description": "... and out.", "items": [ { "id": 333998, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 493969, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003600/a003682/ARTEMISdeluxeC.HR_Full.HD720p.04480.jpg", "filename": "ARTEMISdeluxeC.HR_Full.HD720p.04480.jpg", "media_type": "Image", "alt_text": "... and out.", "width": 1280, "height": 720, "pixels": 921600 } }, { "id": 333997, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 493968, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003600/a003682/ARTEMISdeluxeC.HR_Full.HD720p.04480_web.jpg", "filename": "ARTEMISdeluxeC.HR_Full.HD720p.04480_web.jpg", "media_type": "Image", "alt_text": "... and out.", "width": 320, "height": 180, "pixels": 57600 } }, { "id": 333996, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 493967, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003600/a003682/ARTEMISdeluxeC.HR_Full.HD720p.04480.tif", "filename": "ARTEMISdeluxeC.HR_Full.HD720p.04480.tif", "media_type": "Image", "alt_text": "... and out.", "width": 1280, "height": 720, "pixels": 921600 } } ], "extra_data": {} }, { "id": 352571, "url": "https://svs.gsfc.nasa.gov/3682/#media_group_352571", "widget": "Single image", "title": "", "caption": "", "description": "ARTEMIS-1 completes its capture into lunar orbit,", "items": [ { "id": 334001, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 493972, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003600/a003682/ARTEMISdeluxeC.HR_Full.HD720p.04600.jpg", "filename": "ARTEMISdeluxeC.HR_Full.HD720p.04600.jpg", "media_type": "Image", "alt_text": "ARTEMIS-1 completes its capture into lunar orbit,", "width": 1280, "height": 720, "pixels": 921600 } }, { "id": 334000, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 493971, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003600/a003682/ARTEMISdeluxeC.HR_Full.HD720p.04600_web.jpg", "filename": "ARTEMISdeluxeC.HR_Full.HD720p.04600_web.jpg", "media_type": "Image", "alt_text": "ARTEMIS-1 completes its capture into lunar orbit,", "width": 320, "height": 180, "pixels": 57600 } }, { "id": 333999, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 493970, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003600/a003682/ARTEMISdeluxeC.HR_Full.HD720p.04600.tif", "filename": "ARTEMISdeluxeC.HR_Full.HD720p.04600.tif", "media_type": "Image", "alt_text": "ARTEMIS-1 completes its capture into lunar orbit,", "width": 1280, "height": 720, "pixels": 921600 } } ], "extra_data": {} }, { "id": 352572, "url": "https://svs.gsfc.nasa.gov/3682/#media_group_352572", "widget": "Single image", "title": "", "caption": "", "description": "...followed by ARTEMIS-2.", "items": [ { "id": 334004, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 493975, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003600/a003682/ARTEMISdeluxeC.HR_Full.HD720p.05100.jpg", "filename": "ARTEMISdeluxeC.HR_Full.HD720p.05100.jpg", "media_type": "Image", "alt_text": "...followed by ARTEMIS-2.", "width": 1280, "height": 720, "pixels": 921600 } }, { "id": 334003, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 493974, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003600/a003682/ARTEMISdeluxeC.HR_Full.HD720p.05100_web.jpg", "filename": "ARTEMISdeluxeC.HR_Full.HD720p.05100_web.jpg", "media_type": "Image", "alt_text": "...followed by ARTEMIS-2.", "width": 320, "height": 180, "pixels": 57600 } }, { "id": 334002, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 493973, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003600/a003682/ARTEMISdeluxeC.HR_Full.HD720p.05100.tif", "filename": "ARTEMISdeluxeC.HR_Full.HD720p.05100.tif", "media_type": "Image", "alt_text": "...followed by ARTEMIS-2.", "width": 1280, "height": 720, "pixels": 921600 } } ], "extra_data": {} }, { "id": 352573, "url": "https://svs.gsfc.nasa.gov/3682/#media_group_352573", "widget": "Single image", "title": "", "caption": "", "description": "Now we move down towards the Moon's orbital plane for a close-up as ARTEMIS begins its lunar orbiting phase.", "items": [ { "id": 334007, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 493978, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003600/a003682/ARTEMISdeluxeC.HR_Full.HD720p.05111.jpg", "filename": "ARTEMISdeluxeC.HR_Full.HD720p.05111.jpg", "media_type": "Image", "alt_text": "Now we move down towards the Moon's orbital plane for a close-up as ARTEMIS begins its lunar orbiting phase.", "width": 1280, "height": 720, "pixels": 921600 } }, { "id": 334006, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 493977, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003600/a003682/ARTEMISdeluxeC.HR_Full.HD720p.05111_web.jpg", "filename": "ARTEMISdeluxeC.HR_Full.HD720p.05111_web.jpg", "media_type": "Image", "alt_text": "Now we move down towards the Moon's 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