Astronomers have discovered a rare lemon-shaped planet called PSR J2322-2650b orbiting a city-size star. Found using NASA’s James Webb Space Telescope, the Jupiter-size world is stretched by extreme gravity, making it unlike any planet seen before.
A Planet Unlike Any Seen Before
PSR J2322-2650b stands out first because of its lemon shaped appearance. Most planets, including Earth, are round or slightly flattened at the poles, but this planet looks stretched and pinched at both ends. Scientists believe this unusual lemon shaped form is caused by extreme gravitational forces from the star it orbits.
The planet is located incredibly close to its star—about one hundred times closer than Earth is to the Sun. At this short distance, gravity pulls unevenly on different parts of the planet. Over time, this powerful tug has reshaped the planet, stretching it into a clearly lemon shaped world.
Despite its distorted shape, the planet is massive and similar in size to Jupiter, the largest planet in our solar system. However, unlike Jupiter, which has an atmosphere made mostly of hydrogen and helium, this planet’s atmosphere is very different. Researchers found it contains helium and molecular carbon, a rare combination never before confirmed on a planet.
Scientists say that inside this atmosphere, dark soot-like clouds may float through the skies. These carbon-rich clouds give the planet a gloomy and smoky appearance. Deep below the surface, under extreme pressure and heat, carbon could compress into solid forms, possibly even diamonds, a natural process under the right conditions.
The City-Size Star at the Center
Adding to the mystery is the star that PSR J2322-2650b orbits. The star is described as having the mass of the Sun but squeezed into a space no larger than a city. This makes it incredibly dense and powerful. Such stars are rare and behave very differently from typical stars like the Sun.
Because of its compact size, the star’s gravity is extremely strong. Any planet that gets too close is pulled and stretched by this force. Scientists believe this is exactly what happened to the lemon-shaped planet. As it orbits the star, the gravitational pull constantly reshapes it, preventing it from returning to a round form.
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The planet completes its orbit very quickly due to how close it is to the star. Days and nights on this world would pass far faster than on Earth. The heat from the star is also intense, making the planet an extreme environment where normal rules of planetary behavior do not apply.
Researchers studying the system say the star itself is unusual because it packs so much mass into such a tiny area. This creates conditions that are rarely seen elsewhere in the universe. The combination of a city-size star and a giant planet locked in a close orbit makes this system one of the most extreme ever discovered.
Why This Discovery Matters
The discovery of PSR J2322-2650b is important because it expands the known variety of planets in the universe. Until now, most known planets fit into a few broad categories, such as rocky planets like Earth or gas giants like Jupiter. This lemon-shaped world does not fit neatly into any existing category.
Its carbon-rich atmosphere is especially surprising on this lemon shaped planet. Scientists have long suspected that carbon-heavy worlds could exist, but clear evidence has been difficult to find. This lemon shaped planet provides strong proof that such unusual worlds are real and can form under the right conditions.
The findings also help scientists better understand how gravity can shape planets over time. The intense pull from the nearby star shows how powerful forces can dramatically change a planet’s structure, turning it into a lemon shaped body rather than a round one. This knowledge can be applied when studying other unusual planets and star systems across the galaxy.
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The James Webb Space Telescope played a key role in this discovery by analyzing the light passing through the planet’s atmosphere. This allowed scientists to identify the gases present and confirm the unusual chemical makeup, helping researchers closely examine the features of this rare lemon shaped world using advanced space technology.
As astronomers continue to search the universe, discoveries like this highlight how strange and diverse space can be. The lemon-shaped planet orbiting a city-size star serves as a reminder that the cosmos is filled with worlds far more unusual than anything found in our own solar system.
