A new study suggests that a small icy object beyond Pluto, known as (612533) 2002 XV93, may have a very thin atmosphere despite its tiny size.

Researchers observed it in 2024 as it passed in front of a distant star, briefly dimming the light and indicating the presence of gas.

The atmosphere is estimated to be far thinner than Pluto’s and possibly composed of methane, nitrogen, or carbon monoxide.

Scientists believe it may have formed through volcanic activity or a past comet impact, though this remains unconfirmed, NBC News has reported.

Further observations, including from the James Webb Space Telescope, are needed to verify whether the atmosphere is stable or temporary.