K2-18b

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Introduction & Top Questions References & Edit History Related Topics

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Dancers at a Cinco de Mayo festival at the Mission District, San Francisco, California. (Photo dated 2019.) holidays

Is Cinco de Mayo Mexico's Independence Day?

King Cobra snake in Malaysia. (reptile)

9 of the World’s Deadliest Snakes

Amendments 1-10 to the Constitution of the United States constitute what is known as the Bill of Rights on an American flag.

What Is the Emoluments Clause?

Cathedrale St.Jean in Lyon, France has a 14th-century astronomical clock that shows religious feast days till the year 2019; Perpetual Calendar

Ten Days That Vanished: The Switch to the Gregorian Calendar

Illustration for Demystified "How Dangerous is Quicksand"

How Deadly Is Quicksand?

Figure 13: A Maxim machine gun, belt-fed and water-cooled, operated by German infantrymen, World War I.

7 Deadliest Weapons in History

US Marines firing at Fallujah, Iraq, during the Second Battle of Fallujah in November 2004. Operation Iraqi Freedom, Iraq War.

Timeline of the 2000s

K2-18b: Related Content

Written and fact-checked by The Information Architects of Encyclopaedia Britannica

News •

Exoplanet K2-18b: Home to alien life or noisy data? : Short Wave • May 5, 2025, 7:16 AM ET (NPR)

Proof of life on K2-18b ‘not at all obvious’: Harvard professor • Apr. 30, 2025, 2:28 AM ET (The Hill)

New analysis casts doubt on 'biosignatures' found on planet K2-18b • Apr. 25, 2025, 8:12 AM ET (NPR)

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Kepler-186f CoRoT-7b HD 209458b HIP 13044b