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A scorching, rocky planet twice Earth鈥檚 size has a thick atmosphere, scientists say

This illustration provided by NASA in 2017 depicts the planet 55 Cancri e, right, orbiting its star. A thick atmosphere has been detected around the planet that鈥檚 twice as big as Earth in a solar system about 41 light years away, researchers reported Wednesday, May 8, 2024. (NASA/JPL-Caltech via AP)

This illustration provided by NASA in 2017 depicts the planet 55 Cancri e, right, orbiting its star. A thick atmosphere has been detected around the planet that鈥檚 twice as big as Earth in a solar system about 41 light years away, researchers reported Wednesday, May 8, 2024. (NASA/JPL-Caltech via AP)

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DALLAS (AP) 鈥 A thick atmosphere has been detected around a planet that鈥檚 twice as big as Earth in a nearby solar system, researchers reported Wednesday.

The so-called super Earth 鈥 known as 55 Cancri e 鈥 is among the few rocky planets outside our solar system with a significant atmosphere, wrapped a blanket of carbon dioxide and carbon monoxide. The exact amounts are unclear. Earth鈥檚 atmosphere is a blend of nitrogen, oxygen, argon and other gases.

鈥淚t鈥檚 probably the firmest evidence yet that this planet has an atmosphere,鈥 said Ian Crossfield, an astronomer at the University of Kansas who studies exoplanets and was not involved with the research.

The research was .

Super Earth refers to a planet鈥檚 size 鈥 bigger than Earth but smaller than Neptune. The boiling temperatures on this planet 鈥 which can reach as hot as 4,200 degrees Fahrenheit (2,300 degrees Celsius) 鈥 mean that it is unlikely to host life.

Instead, scientists say the discovery is a promising sign that other such rocky planets with thick atmospheres could exist that may be more hospitable.

The exoplanet 41 light years away is eight times heavier than Earth and circles its star Copernicus so closely that it has permanent day and night sides. A light-year is nearly 6 trillion miles (9.7 trillion kilometers). Its surface is encrusted with magma oceans.

To identify the makeup of its atmosphere, researchers studied Webb Space Telescope observations before and after the planet passed behind its star.

They separated the light emitted from the planet versus its star and used the data to calculate the planet鈥檚 temperature. There鈥檚 evidence the planet鈥檚 heat was being distributed more evenly across its surface 鈥 a party trick atmospheres are known for.

Gases from its magma oceans may play a key role in holding its atmosphere steady. Exploring this super Earth may also yield clues to how Earth and Mars might have evolved first with magma oceans that have since cooled, scientists say.

鈥淚t鈥檚 a rare window,鈥 said Renyu Hu, a planetary scientist at NASA鈥檚 Jet Propulsion Laboratory, who was part of the research. 鈥淲e can look into this early phase of planet evolution.鈥

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老澳门六合彩 Health and Science Department receives support from the Howard Hughes Medical Institute鈥檚 Science and Educational Media Group. The AP is solely responsible for all content.

Ramakrishnan is a science reporter for 老澳门六合彩, based in Dallas. She covers scientific research and early human history and development.