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Sagittarius B2 NIRCam to MIRI Fade

See what different wavelengths of infrared light reveal and conceal. Near-infrared light, which is nearest to visible red, comes from some gas and an abundance of colorful stars. The longer wavelengths of mid-infrared light are emitted by warm dust and only the brightest stars.

  • Release Date
    September 24, 2025
  • Science Release
    NASA’s Webb Explores Largest Star-Forming Cloud in Milky Way
    Read the release
  • Credit
    Video: NASA, ESA, CSA, Alyssa Pagan (STScI)

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  • Video: 1280 × 720, 30 FPS
    mp4 (9.59 MB)
  • Image, 1280 × 564
    gif (16.99 MB)

Related Images & Videos

A wide view of a region of space filled with stars and clumps of orange clouds.

Sagittarius B2 (NIRCam Image)

Stars, gas and cosmic dust in the Sagittarius B2 molecular cloud glow in near-infrared light, captured by Webb’s NIRCam instrument. The darkest areas of the image are not empty space but are areas where stars are still forming inside dense clouds that block their light

Cosmic clouds of pink and purple, some with bright centers, are surrounded by dark areas that appear like black space dotted with bright blue stars. A group of small clouds to the right is more red than any other area of the image.

Sagittarius B2 (MIRI Image)

Webb’s MIRI instrument shows the Sagittarius B2 region in mid-infrared light, with warm dust glowing brightly. Only the brightest stars emit strongly enough to appear through the dense clouds as blue pinpoints.

A region of space filled with stars and clumps of orange clouds, with compass arrows, scale bar, and color key for reference.

Sagittarius B2 (NIRCam Compass Image)

This image of the Sagittarius B2 (Sgr B2) molecular cloud, captured by the NIRCam (Near-Infrared Camera) instrument on NASA’s James Webb Space Telescope includes compass arrows, scale bar, and color key for reference.

Cosmic clouds of pink and purple, some with bright centers, are surrounded by dark areas that appear like black space dotted with bright blue stars. Compass arrows, scale bar, and color key are included for reference.

Sagittarius B2 (MIRI Compass Image)

This image of the Sagittarius B2 (Sgr B2) molecular cloud, captured by MIRI (Mid-Infrared Instrument) on NASA’s James Webb Space Telescope includes compass arrows, scale bar, and color key for reference.

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Details

Last Updated
Sep 24, 2025
Location
NASA Goddard Space Flight Center
Contact
Media

Laura Betz
NASA’s Goddard Space Flight Center
Greenbelt, Maryland
laura.e.betz@nasa.gov

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