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https://starlust.org/astrophysicist-explains-how-mars-orbiters-captured-closest-view-of-interstellar-comet-3-i-atlas/ Astrophysicist explains how Mars Orbiters captured closest view of interstellar comet 3I/ATLAS -... Dec 4, 2025 - Astrophysicist Avi Loeb confirmed the CaSSIS image of 3I/ATLAS, a 'fuzzy ball of light,' is consistent with prior Hubble Space Telescope observations. https://unbscholar.lib.unb.ca/items/75afcda3-1b3a-4a83-aa17-c90acbd6f0e1 Precise orbit determination of low earth orbiters with a single GPS receiver-based, geometric... One application of the Global Positioning System (GPS) involves placing GPS receivers aboard earth orbiting space vehicles to provide in situ tracking...