James Webb Space Telescope Discovers Exotic Salt Clouds on the 'Pink Planet'

Unraveling a Cosmic Mystery

Astronomers have finally cracked the mystery of the famous "Pink Planet," a strange world 57 light-years away that has puzzled scientists for more than a decade. The so-called Pink Planet, formally known as GJ504b, was discovered in 2013 and is technically not a planet but rather a "planetary-mass companion" because it could be a giant exoplanet or a small brown dwarf orbiting a star.

Atmospheric Composition Revealed

Using the James Webb Space Telescope, researchers discovered that its atmosphere contains water vapor, methane, carbon dioxide, ammonia, and something never directly confirmed before in such an object: salty clouds. The team identified water vapor, carbon monoxide, methane, carbon dioxide, ammonia and hydrogen sulfide, along with rarer isotope-bearing versions of carbon monoxide.

Why Salt Clouds Are Significant

The findings provide some of the first direct evidence that salt clouds can exist in the atmosphere of a cold planetary object, confirming a prediction scientists first made more than 15 years ago. Clouds of salt may sound exotic, but they are a natural consequence of chemistry at these temperatures. In atmospheres too cool for the rock and metal clouds of hotter worlds, salts can condense out of the gas and gather into haze, much as water vapor condenses into clouds on Earth.

JWST's Breakthrough Capability

"We were really, really amazed by how easy it was to detect with James Webb, as opposed to like it had been close to impossible from the ground," Baburaj told CBS News. In the past, other astronomers observed the companion for an entire night with some of the biggest telescopes in the world to obtain a spectrum and they could not see the object. With JWST, the entire observation took around two hours, and was successful.