Hubble and Webb Reveal Cat's Head Nebula in Carina
NASA's Hubble and Webb captured visible and infrared views of the Cat's Head Nebula, a pillar in the Carina Nebula, to study how massive stars shape star formation.
The story in focus
NASA reports that the Hubble and Webb space telescopes captured complementary visible-light and infrared views of the Cat's Head Nebula, a pillar inside the Carina Nebula about 7,500 light-years away. Astronomers are using the images to study how radiation and winds from massive stars sculpt star-forming regions and to identify an embedded young star.
- The Cat's Head Nebula sits in the Carina Nebula, roughly 7,500 light-years from Earth
- The pillar's shape likely results from ultraviolet radiation and winds from nearby massive stars eroding gas and dust
- Hubble's visible-light view shows an opaque dust pillar and a bright rim consistent with photoevaporation
- Webb's infrared views make the filament more transparent and reveal warm dust and carbon-based molecules
What the telescopes observed
NASA describes the Cat's Head Nebula as a small, temporary region nicknamed for its resemblance to a seated cat, with its head turned right and a glowing eye. Hubble's visible-light image shows a dark brown dust pillar edged by a hazy yellow ridge, which NASA says is consistent with gas ionized by ultraviolet radiation from massive stars.
Webb's near-infrared view makes the filament more transparent and reveals dense star fields, while its mid-infrared view outlines warm dust and carbon-based molecules. A bright yellow source to the pillar's right is likely an infant star still embedded in dust.
How stellar feedback shapes the pillar
According to NASA, the cat-like shape was likely sculpted over time by intense ultraviolet radiation and winds from massive stars in Carina. As this stellar feedback erodes surrounding gas and dust, denser material resists erosion, at least for now.
The surrounding diffuse material appears blue and cyan above and shifts to yellow, orange and red below in Hubble's filters, which capture oxygen, hydrogen and sulfur emission plus scattered starlight.
What remains unresolved
NASA notes that the nebula is a transient scene that will eventually disperse as stars form and evolve. A narrow filament appears to cross the embedded stellar source in the mid-infrared image, but the agency states the image alone cannot show whether the two are physically related.
How far away is the Cat's Head Nebula, and what likely shaped its cat-like form?
NASA places it about 7,500 light-years away inside the Carina Nebula. The agency says intense ultraviolet radiation and winds from massive stars likely sculpted the feline shape by eroding surrounding gas and dust.
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