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NASA Launches Sentinel-6B, Prepares for Comet Encounter

11/20/2025

Center

NASA Launches Sentinel-6B

National Aeronautics and Space Administration launched the Sentinel-6B satellite on November 16, 2025, from Vandenberg Space Force Base in California.
The mission will enhance hurricane forecasts and provide ocean and atmospheric data, continuing the Sentinel-6 Michael Freilich legacy.
NASA shared new images of interstellar comet 3I/ATLAS ahead of its December 19, 2025 approach.
Observations from missions including the Mars Reconnaissance Orbiter reveal its composition and confirm it as a comet.

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NASA Unveils Comet Images

NASA will unveil high-resolution images of interstellar comet 3I/ATLAS on November 19, 2025, at the Goddard Space Flight Center.
Images captured by missions including the Mars Reconnaissance Orbiter may reveal the comet's nucleus and anti-tail.
Harvard University astronomer Avi Loeb speculates the images could show artificial origins or accompanying objects.
He previously criticized NASA for delaying the release during government shutdown, and a livestream will let viewers witness the event.

History

Historical Context

The Sentinel-6 mission, initiated with the launch of Sentinel-6A Michael Freilich on 21 November 2020, continues the legacy of high-precision satellite altimetry that began with TOPEX/Poseidon in 1992. This collaboration between NASA and the European Space Agency aims to monitor sea-level rise and ocean currents, providing critical data for climate change research and enhancing weather forecasting through the upcoming Sentinel-6B satellite, scheduled for 2025.

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NASA Launches Sentinel-6B

National Aeronautics and Space Administration launched the Sentinel-6B satellite on November 16, 2025, from Vandenberg Space Force Base in California.
The mission will enhance hurricane forecasts and provide ocean and atmospheric data, continuing the Sentinel-6 Michael Freilich legacy.
NASA shared new images of interstellar comet 3I/ATLAS ahead of its December 19, 2025 approach.
Observations from missions including the Mars Reconnaissance Orbiter reveal its composition and confirm it as a comet.

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