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7 Mysterious Exoplanets Orbiting Distant Stars

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TOI 849b is one of the largest rocky planets ever discovered. It’s a massive, desolate world with zero atmosphere, orbiting incredibly close to its star. Temperatures soar to 1,500 degrees Celsius (2,700 Fahrenheit), making survival impossible. Its density suggests it may be the exposed core of a gas giant that lost its outer layers, offering a rare glimpse into planetary formation.
Kepler 70b, formerly a Jupiter-sized planet, has been shrunk and scorched by its dying star. Temperatures reach a staggering 6,800 degrees Celsius (12,000 Fahrenheit) as the planet’s outer layers evaporate under extreme friction. Its close orbit ensures it will not survive for much longer in cosmic terms, making it a transient but violent spectacle. The planet’s extreme heat even affects the star’s outer layers, creating a feedback loop of destruction.
KELT-9b is a gas giant three times the size of Jupiter, with temperatures over 4,300 degrees Celsius (7,820 Fahrenheit). Heat here is so intense that molecules are torn apart, and the planet is losing its atmosphere to relentless stellar radiation. Its extreme conditions could vaporize metals and transform clouds into exotic compounds. The planet’s day side and night side have a stark temperature contrast, creating violent atmospheric currents. This is a place where matter itself is tested to the breaking point.
AU Mic b orbits a young red dwarf star, 22 million years old, and is bombarded with intense X-rays. Its hydrogen atmosphere escapes constantly, and the planet is trapped in a disk of dust. Frequent stellar flares make the surface environment highly volatile, with bursts of energy that could strip away any atmosphere in seconds.
Gliese 1214-b is a watery planet eight times the mass of Earth. With 75 percent of its mass as water, the oceans are thousands of kilometers deep, and the superheated atmosphere traps anyone unlucky enough to land there. Pressure deep in the ocean transforms matter into plasma, creating a world that is literally uninhabitable. Its dense atmosphere also generates crushing winds, and chemical reactions in the water could produce toxic clouds.
WASP-12b orbits so close to its star that it is literally being pulled apart. This gas giant is stretched into an egg shape, shedding massive amounts of material into space. Its outer layers are stripped away, forming a stream of debris that may eventually create a ring system around the star. The intense tidal forces also heat the planet’s interior, possibly igniting chemical reactions that would be deadly to any visitor.
HR5183b, three times more massive than Jupiter, has an elliptical orbit that causes extreme speed changes. When closest to its star, the planet accelerates dramatically, earning its nickname the Whiplash Planet. Its orbit is so extreme that gravitational forces could disturb neighboring planets, triggering collisions or ejections. The planet’s high mass amplifies its gravitational pull, making nearby space a dangerous place for smaller celestial bodies. Its orbit could destabilize neighboring worlds, making it a cosmic wrecking ball.
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