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Members of the Artemis II closeout crew, from left, William Sattler; Tyler Sutherland; Michael Heinemann; Christian Warriner; Taylor Hose; Jenni Gibbons, Artemis II backup crew member; Bill Owens; and Andre Douglas, Artemis II backup crew member, pose for a photo with NASA’s Vehicle Assembly Building behind them at the agency’s Kennedy Space Center in Florida on Thursday, Dec. 19, 2025. The closeout crew is responsible for safely securing the astronauts inside the Orion spacecraft on launch day and closing the hatch during launch countdown.

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James Webb Space Telescope - NASA
https://www.nasa.gov/gallery/james-webb-space-telescope
This image features the Cassiopeia A supernova, an expanding ball of matter and energy ejected ... Data from Chandra and Webb of the supernova remnant Cassiopeia ...
6 Min Read

NASA's Chandra Reveals Star's Inner Conflict Before Explosion
https://www.nasa.gov/missions/chandra/nasas-chandra-reveals-stars-inner-conflict-before-explosion
This graphic features data from NASA's Chandra X-ray Observatory of the Cassiopeia A (Cas A) supernova remnant that reveals that the star's interior ...
5 Min Read

NASA’s IXPE Unlocks Mysteries of Historic Tycho Supernova
https://www.nasa.gov/centers-and-facilities/marshall/nasas-ixpe-unlocks-mysteries-of-historic-tycho-supernova
But Tycho yielded a much higher degree of X-ray polarization than Cassiopeia A, suggesting it may possess a more ordered, less turbulent magnetic field. The ...
1 Min Read

Image of the Constellation Cassiopeia - NASA Science
https://science.nasa.gov/asset/hubble/image-of-the-constellation-cassiopeia
This back-yard view of the constellation Cassiopeia was taken by Akira Fujii. The center bar of the Milky Way Galaxy runs through the middle of the ...
1 Min Read

Constellations: Wonders Within - NASA
https://www.nasa.gov/stem-content/constellations-wonders-within
Download educational activities and a series of posters with dramatic images made by combining data from the best of modern telescopes.
Chandra X-ray Observatory - NASA
https://www.nasa.gov/gallery/chandra-x-ray-observatory/page/2
This image features the Cassiopeia A supernova, an expanding ball of matter and energy ejected.
6 Min Read

NASA's Chandra Releases New 3D Models of Cosmic Objects
https://www.nasa.gov/missions/chandra/nasas-chandra-releases-new-3d-models-of-cosmic-objects
Contents. Cassiopeia A (Cas A); BP Tau; Cygnus Loop; G292.0+1.8; Visual Description; News Media Contact.
1 Min Read

Image Article - Page 2098 of 3081 - NASA
https://www.nasa.gov/page/2098/?post_type=image-article
This image—acquired by the Advanced Land Imager (ALI) on NASA's Earth Observing-1 (EO-1) satellite on February 8, 2014—offers a view… Adding a New “Color” to ...
Image of the Day - NASA
https://www.nasa.gov/image-of-the-day/page/12/?id=341740
This image of Cassiopeia A resembles a disk of electric light with red clouds, glowing ... Cassiopeia A, a circular-shaped cloud of gas and dust with ...
1 Min Read

IC 63 Ghost Nebula in Infrared - NASA Science
https://science.nasa.gov/asset/hubble/ic-63-ghost-nebula-in-infrared
One striking example is "the Ghost of Cassiopeia," officially known as IC 63, located 550 light-years away in the constellation Cassiopeia the Queen.
4 Min Read

NASA-JAXA XRISM Finds Elemental Bounty in Supernova Remnant
https://science.nasa.gov/missions/xrism/nasa-jaxa-xrism-finds-elemental-bounty-in-supernova-remnant
Observations of the Cassiopeia A supernova remnant by the Resolve instrument aboard the NASA-JAXA XRISM (X-ray Imaging and Spectroscopy Mission) spacecraft ...
Image of the Day - NASA
https://www.nasa.gov/image-of-the-day/page/13/?id=372838
Cassiopeia A, a circular-shaped cloud of gas and dust with complex structure.
NASA/T. Delaney Archives

https://science.nasa.gov/science-org-term/nasa-t-delaney

Cassiopeia A (Cas A) is the debris field left behind after a massive star exploded. This explosion would have appeared… Mar 25, 2025. Topic.
6 Min Read

NASA Telescopes Chase Down "Green Monster" in Star's Debris
https://www.nasa.gov/image-article/nasa-telescopes-chase-down-green-monster-in-stars-debris
Data from Chandra and Webb of the supernova remnant Cassiopeia A (Cas A) have. Start. End. X-ray: NASA/CXC/SAO; Optical: NASA/ESA/STScI; IR: NASA/ESA/CSA/STScI ...
1 Min Read

Death Becomes Her - NASA Science
https://science.nasa.gov/missions/chandra/death-becomes-her
This stunning false-color picture shows off the many sides of the supernova remnant Cassiopeia A, which is made up of images taken by three of NASA's Great.
1 Min Read

Cassiopeia A: Colorful, Shredded Remains of Old Supernova - NASA Science
https://science.nasa.gov/asset/hubble/cassiopeia-a-colorful-shredded-remains-of-old-supernova
Cas A is the youngest known supernova remnant in our Milky Way Galaxy and resides 10,000 light-years away in the constellation Cassiopeia, so the star actually ...
1 Min Read

Supernova Remnant Cassiopeia A – December 2004 - NASA Science
https://science.nasa.gov/asset/hubble/supernova-remnant-cassiopeia-a-december-2004
... 30 seconds!). Cas A is located ten thousand light ... Object DescriptionThe type of astronomical object. Supernova Remnant. Release Date. August 29, 2006.
1 Min Read

Chandra Reveals Elementary Nature of Cassiopeia A - NASA Science
https://science.nasa.gov/resource/chandra-reveals-elementary-nature-of-cassiopeia-a
An image from NASA's Chandra X-ray Observatory shows the location of several elements produced by the explosion of a massive star. Cassiopeia A is a.
1 Min Read

Cassiopeia A Close-ups (NIRCam Image) - NASA Science
https://science.nasa.gov/asset/webb/cassiopeia-a-close-ups-nircam-image
This image highlights several interesting features of supernova remnant Cassiopeia A as seen with Webb's NIRCam (Near-Infrared Camera): NIRCam's exquisite ...
1 Min Read

Cassiopeia A (MIRI Compass Image) - NASA Science
https://science.nasa.gov/asset/webb/cassiopeia-a-miri-compass-image
Cassiopeia A (Cas A) is a supernova remnant located about 11,000 light-years from Earth in the constellation Cassiopeia. It spans approximately 10 light-years.

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