Webb's Sharpest View Yet of the Lion Nebula

There is a lion's face in Gemini, 6,000 light-years away, and it is made of the wreckage of a star like ours. NASA released the new Webb Lion Nebula image on 10 August 2026, combining data from the telescope's Near-Infrared Camera and its Mid-Infrared Instrument into the clearest view yet of NGC 2392.

What the image shows

The mane is the part that earns the name. Cyan in the processed image marks the interior of a dust shell being lit from inside by the central star. Toward the edges of that mane sit purple clumps, dense knots of surviving material with what look like cometary tails streaming away from the centre.

Those tails are not decoration. They are direction markers. Each clump is dense enough to resist the radiation pouring off the central star, and the material behind it gets shielded, leaving a wake pointing away from the source. The picture is a map of what is being destroyed and what is holding out.

What NGC 2392 actually is

It is a planetary nebula, which is one of astronomy's worst names. Nothing planetary is involved. It is what a Sun-like star leaves behind when it runs out of fuel: the outer layers are shed into space while the core collapses into a white dwarf, which then blasts the departing gas and dust with ultraviolet radiation and lights the whole thing up.

The object has also been called the Eskimo Nebula, a name now largely retired. Whatever you call it, the structure is a preview. Our own Sun will do something like this in about five billion years.

Why two instruments instead of one

NIRCam and MIRI see different things. Near-infrared picks up hotter, more energetic material and starlight passing through gas. Mid-infrared sees cooler dust glowing with its own heat. A planetary nebula has both problems at once: hot ionised gas near the centre, cold dust further out.

Combining the two is what turns a bright smudge into structure you can actually reason about. It is the same instrumental story as the Inouye telescope's sharpest solar images: the science does not move because the theory changed, it moves because something finally resolved the detail the theory was arguing about.

Seeing it for yourself

NGC 2392 is a genuine amateur target, but a modest one. At around tenth magnitude and very small on the sky, it wants a telescope rather than binoculars, and it will show as a small blue-grey disc rather than anything resembling the Webb image. Gemini is a winter constellation from the northern hemisphere, so it is a target for the colder months, not August.

If you are star-hopping to find it, a decent pair of binoculars such as the Celestron Cometron 7x50 is the easiest way to learn the surrounding star field before you point anything more serious at it. For everything else in the sky worth chasing, our piece on the fastest star in the Milky Way covers a target you will never see at all, which is its own kind of fun.

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