Black cats are a Halloween staple, but this one is made of cosmic dust and lit by giant stars. NASA’s James Webb Space Telescope has released a new image of the Cat’s Head Nebula, a dusty structure inside the Carina Nebula that looks remarkably like a cat sitting with its back to the viewer, head turned and one eye glowing.

The image was released on October 29 and featured by NASA on October 30, just in time for spooky season. Here is what you are looking at and why it is more than a fun shape.

What the image shows

The picture is a mid-infrared view, meaning it captures light that is invisible to our eyes. According to NASA’s description, a bluish-gray filament of dust runs up the middle of the frame, narrow and irregular, shaped like a cat sitting with its tail extending downward. The tail widens into a triangular peak of dust near the bottom.

The cat’s head is turned to the right, revealing what looks like a white glowing eye. The background glows mostly red, with the black of space visible in the top corners. Next to the cat sits a dome-shaped group of faint dust filaments, and stars are scattered throughout the scene, some showing Webb’s signature eight-point diffraction spikes.

The image was processed by Joseph DePasquale at the Space Telescope Science Institute (STScI), and is credited to NASA, ESA, CSA and STScI.

How a cosmic cat gets its shape

The Cat’s Head sits within the Carina Nebula, one of the most active star-forming regions visible from Earth and home to some extremely massive stars.

NASA explains that the distinctive shape was likely sculpted over time by intense ultraviolet radiation and winds from those massive stars. As this “stellar feedback” erodes the surrounding gas and dust, denser material inside the feline-shaped pillar resists the erosion, “at least for now.”

In other words, the cat is what is left behind. The thinner material around it has been blown and burned away, while the thickest knot of dust holds its ground. Over time, even that will be worn down.

Why astronomers care about pillars like this

Structures like the Cat’s Head are more than pretty pictures. Dense pillars of gas and dust are places where new stars can form, and studying how they are shaped helps astronomers understand how massive stars influence their neighborhoods.

Webb’s mid-infrared vision is especially useful here. Dust that blocks visible light glows at these longer wavelengths, letting the telescope trace its structure in detail. The Carina Nebula has been a favourite Webb target since the telescope’s first images in 2022, which included the famous “Cosmic Cliffs” in the same region.

Seeing shapes in space

Humans love finding familiar shapes in random patterns, a tendency called pareidolia. Astronomy is full of examples, from the Horsehead Nebula to the Pillars of Creation. The Cat’s Head joins that list, and its timing could not be better for October 31.

Want to explore it yourself?

NASA’s image page includes a full description of the picture, and the image is free to view and share. If you have a telescope, the Carina Nebula is visible from the Southern Hemisphere and tropical latitudes, though you will need Webb’s infrared eyes to see the cat.

The last word

A glowing-eyed cat carved by starlight is a perfect Halloween treat from one of humanity’s most powerful observatories. It is also a reminder that the universe’s most striking sights are often the result of slow, violent processes, in this case massive stars wearing away a cloud of dust until only the shape of a cat remains.

Image: Cat’s Head Nebula (Webb MIRI Image) (1505691) by Image: NASA, ESA, CSA, STScI; Image Processing: Joseph DePas via Wikimedia Commons, Public Domain Mark 1.0