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    "story_id": "mp-2026-08-01-003",
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    "headline": "Rubin Stacked a Deeper Window on COSMOS",
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    "dek": "The observatory's second early data preview combines hundreds of looks at a famous field containing more than half a million galaxies.",
    "summary": "The observatory's second early data preview combines hundreds of looks at a famous field containing more than half a million galaxies.",
    "body_text": "The NSF-DOE Vera C. Rubin Observatory released a deeply stacked image of the COSMOS field made from hundreds of observations. The field contains more than 500,000 galaxies and over 50,000 Milky Way stars. The wider Early Data Preview 2 validation campaign, gathered from April 2025 through January 2026, covers about 3,000 square degrees; it is an early science product, not the full ten-year survey.",
    "why_it_matters": "The observatory's second early data preview combines hundreds of looks at a famous field containing more than half a million galaxies.",
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      "The wider Early Data Preview 2 validation campaign, gathered from April 2025 through January 2026, covers about 3,000 square degrees; it is an early science product, not the full ten-year survey."
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        "text": "The observatory's second early data preview combines hundreds of looks at a famous field containing more than half a million galaxies.",
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    "tags": [
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      "source_id": "source-2026-08-01-003",
      "title": "NSF-DOE Vera C. Rubin Observatory via Newswise: COSMOS deep window",
      "publisher": "NSF-DOE Vera C. Rubin Observatory via Newswise",
      "url": "https://www.newswise.com/articles/nsf-doe-rubin-observatory-opens-deep-window-on-famous-cosmic-field",
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    "title": "Rubin Stacked a Deeper Window on COSMOS",
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