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    NASA/ESA’s SOHO Observes Interstellar Comet 3I/ATLAS

    A faint, slightly yellowish point of light—Comet 3I/ATLAS—appears near the center of a grainy, brown-toned background captured by the SOHO/LASCO C3 coronagraph between October 15–26, 2025. The comet is only marginally brighter than the surrounding noise, making it difficult to distinguish.

    The ESA (European Space Agency) and NASA Solar and Heliospheric Observatory, or SOHO, spacecraft captured a glimpse of interstellar comet 3I/ATLAS on Oct. 15–26. During this time period, the spacecraft’s Large Angle and Spectrometric Coronagraph (LASCO) instrument suite spotted the comet crossing its field of view from approximately 222 million miles (358 million kilometers) away, […]

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    NASA’s PUNCH Spies Interstellar Comet 3I/ATLAS

    A round, white object appears at the center of a black-and-white image, with a short tail-like feature extending to the right. Fuzzy black, white, and gray diagonal, parallel stripes fill the background.

    NASA’s PUNCH (Polarimeter to Unify the Corona and Heliosphere) mission observed interstellar comet 3I/ATLAS during its passage through the inner solar system. The mission’s ability to observe areas of the sky near the Sun allowed PUNCH to track the comet as it passed close to our star, when few other observatories could. This image was created from multiple observations taken […]

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    NASA’s Lucy Spacecraft Snaps Photos of Interstellar Comet 3I/ATLAS

    A comet in the middle of a star field with a faint tail extending to the right.

    Lucy’s high-resolution, black-and-white imager, L’LORRI, captured a series of photos between Sept. 15–17, as the comet was zooming toward Mars. Lucy was 240 million miles away from 3I/ATLAS, well beyond the orbit of Mars, on its way to explore eight asteroids out of two swarms of asteroids that share an orbit with Jupiter, collectively known as the Jupiter Trojan asteroids.

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    Heart Health, Stem Cells, and Physics Keep Crew Busy on Tuesday

    Life science and physics topped the research schedule aboard the International Space Station on Tuesday as the Expedition 73 crew studied heart health, stem cells, fluid physics, and spacecraft fire safety. The orbital residents also completed work on a spacesuit and inspected ventilation and electrical systems while continuing other scientific operations.

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    Monday’s Research Studies Ways to Protect Eyes and Lungs in Space

    Expedition 73 kicked off the week exploring how to prevent space-caused vision problems and what happens to the respiratory system in microgravity. The International Space Station residents also worked on combustion research and Earth observation gear, organized food and cargo inventory, and serviced life support systems.

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    Sentinel-6B Satellite Acquires Signal

    Image shows the Earth in the background while NASA's Sentinel-6B spacecraft outlined in gold separates from SpaceX second stage.

    Mission controllers for Sentinel-6B received full acquisition of signal from the spacecraft at 1:54 a.m. EST Monday, Nov. 17. After cross-calibrating its data, Sentinel-6B will take over from Sentinel-6 Michael Freilich, launched Nov. 21, 2020, to monitor sea levels, measure wind and wave conditions, and improve both short and long-term weather predications. It is expected […]

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    Sea-Level Monitoring Satellite Flying Solo

    Image shows the Earth in the background and a metallic second stage of SpaceX separating from NASA's Sentinel-6B spacecraft

    The Sentinel-6B satellite is flying on its own after separating from the SpaceX Falcon 9 second stage. Satellite-6B, part of a mission led jointly by NASA, ESA (European Space Agency), EUMETSAT (the European Organisation for the Exploitation of Meteorological Satellites), and the National Oceanic and Atmospheric Administration (NOAA), with funding support from the European Commission […]

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    Second Stage Burn Complete

    The SpaceX Falcon 9 second stage completed its second burn, and in just a few minutes the Sentinel-6B spacecraft will separate from the rocket.

    First Stage Rocket Returns to Earth; Coast Phase Begins

    Looking down, an image shows a SpaceX first stage booster returning to Landing Zone 4 East  at Vandenberg Space Force Base in California following launch of Sentinel-6B.

    The SpaceX Falcon 9 rocket’s first stage successfully touched down on Landing Zone 4 East at Vandenberg Space Force Base in California following launch of Sentinel-6B. The Falcon 9 second stage will continue to coast for approximately 45 minutes before igniting for a brief, one-minute burn to align its trajectory with its intended destination in […]

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    Second Stage Engine Start

    The Falcon 9’s second stage Merlin engine, carrying Sentinel-6B, ignited, marking the first of two planned burns that will deliver the satellite to its designated orbit. The rocket’s protective payload fairing separated and is on way back to Earth, where SpaceX plans to recover it.

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