NASA just dropped one of its strangest space finds yet. A planet shaped like a squashed lemon, cooked by radiation, wrapped in carbon, and circling one of the deadliest stars in the galaxy. This is not sci-fi. It is real, and it is changing the rules of how planets are supposed to form.
The discovery comes from observations made by the James Webb Space Telescope. The target is an exoplanet known as PSR J2322-2650b.
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It sits about 750 light-years from Earth, and nothing about it behaves like a normal planet.
A Planet Orbiting a Stellar Monster
GTN / The exoplanet circles a millisecond pulsar, which is the ultra-dense corpse left behind after a massive star explodes.
The pulsar spins hundreds of times per second and blasts out gamma radiation instead of light. That sounds like bad news for planet hunters, but it turned out to be perfect. Webb’s infrared eyes barely notice the pulsar, yet the planet still reflects enough energy to be studied. That gave scientists a clean signal, free from the usual glare that hides planetary details.
This setup is incredibly rare. Most exoplanets are lost in the light of their stars. Here, the star practically vanished, leaving the planet exposed. That is how Webb pulled off one of the clearest atmospheric reads ever taken of a planet in such an extreme system.
Why This Planet Looks Like a Lemon
PSR J2322-2650b orbits just one million miles from its pulsar. That is insanely close. Earth sits one hundred million miles from the Sun, and even that distance keeps us warm. This planet is pinned so tightly that a full orbit takes only 7.8 hours.
That closeness comes with brutal gravity. The pulsar’s pull stretches the planet as it moves, warping it out of a round shape. Webb detected changes in brightness that matched detailed models of a body being squeezed from both sides. The result is an oval, lemon-like form instead of a sphere.
However, heat makes things worse. The side facing the pulsar hits temperatures around 3,700 degrees Fahrenheit. The far side cools to about 1,200 degrees. That extreme contrast adds stress to the planet’s structure, helping lock in its warped shape.
The Carbon Atmosphere That Breaks the Rules
Space / IG / The atmosphere is packed with helium and pure molecular carbon, mainly C₂ and C₃. That combination is almost unheard of.
In space, carbon loves to bond. It usually pairs up with oxygen or hydrogen. Here, it floats free, dominating the atmosphere on its own.
This points to a chemical imbalance that should not exist under standard planetary conditions. One idea is that the atmosphere contains dark, soot-like clouds made of carbon. Another is even wilder.
Deep inside the planet, pressure may be so intense that carbon turns into diamond. If true, parts of this world could literally rain diamonds while being roasted by radiation.
Some scientists compared the system to a black widow pulsar. In those systems, a pulsar strips material from a companion star. That still does not work here. Stars undergoing fusion create oxygen and nitrogen along with carbon. This planet shows no trace of either.
One theory suggests the object may not be a planet at all, at least not in the traditional sense. It could be something new, a hybrid left over from a stellar death, reshaped and chemically altered over time. Even the researchers admit this explanation is incomplete. The lead author openly stated this may be an entirely new class of object.