‘Not quite a gas planet’: Magma ocean world discovered 35 light-years from Earth | Technology News – Knoow.in

According to the study, the planet’s interior is likely dominated by a long-lasting magma ocean. This molten layer enables gases, such as hydrogen, to be trapped and slowly released over a vast period of time. (Image for representation: X/ Jeff)

3 min readNew DelhiMar 21, 2026 09:05 PM IST

Astronomers have discovered new information regarding a distant world that could alter scientists’ understanding of planets outside our solar system. The planet is called L 98-59 d. It is believed to have a permanent ocean of molten rock beneath its surface and an unusual atmosphere with a lot of volatile gases.

In a recent study published in Natureit has been mentioned that L 98-59 d, which is located about 35 light-years from Earth, is slightly larger than our planet but has a much lower density, suggesting it is not made purely of rock and metal.

A planet with a molten interior

According to the study, the planet’s interior is likely dominated by a long-lasting magma ocean. This molten layer enables gases, such as hydrogen, to be trapped and slowly released over a vast period of time.

This process, scientists believe, may help to maintain the atmosphere of the planet. Instead of losing its gases quickly, L 98-59 d appears to recycle them through ongoing interactions between its interior and atmosphere.

Not quite a gas planet, nor a water world

One of the most surprising findings is that the planet does not fit into existing categories. It is neither a typical gas-rich “mini-Neptune” nor a water-heavy world. Instead, its atmosphere appears to be controlled by chemical reactions, as well as “volcanic” processes, which are associated with its molten interior.

The research indicates that gases containing sulfur, such as sulfur dioxide, are most likely produced inside the planet through a process of photochemical reaction in a hydrogen-rich environment. This points to a chemically distinct interior unlike anything seen in planets in our own solar system.

Also Read: Astronomers spot violent collision of two exoplanets 11,000 light-years away: ‘It went completely bonkers’

A new way to understand planets

Researchers say L 98-59 d could represent a new class of planets – ones where magma oceans and atmospheric chemistry work together over long periods. The findings may explain why so many planets in space come in a variety of different sizes, densities, and atmospheres.

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The study also demonstrates the evolution of planets over time. L 98-59 d could have started out as a gas-rich planet but eventually evolved into what we see today after losing part of its atmosphere.