Mysterious cat's tail found near young star

Astronomers have discovered a strange, tail-like structure in the disk of dust and gas around Beta Pictoris, a young star about 63 light-years away from Earth. This feature, resembling a cat's tail, was first spotted by the James Webb Space Telescope in 2024 and is now the focus of two recent studies published in The Astrophysical Journal Letters and The Astronomical Journal.

Structure made of carbon-rich dust

The "cat's tail" is composed of dust grains rich in organic carbon, which makes them very good at absorbing visible light. This property makes the structure hard to see with traditional telescopes, but the James Webb Space Telescope's infrared vision allowed it to be detected. Later observations using the Hubble Space Telescope in visible light confirmed the structure's existence.

Dust grains are tiny and porous

The dust grains in the structure are about a micron in size — roughly one-thousandth of a millimeter — and are highly porous. This unusual structure has puzzled scientists, who are trying to understand how such tiny, fragile particles can survive in the harsh environment of a circumstellar disk.

Collision may explain the structure

Kevin Wagner, a co-author of the study from the University of Arizona's Steward Observatory, suggested that a high-speed collision between two celestial bodies, possibly as large as Pluto, could have caused the carbon grains to vaporize before recondensing. This process might have created the porous, lightweight dust observed in the "cat's tail."

Beta Pictoris system studied for decades

The Beta Pictoris system has been a subject of scientific interest for many years. First detected in 1983 by the IRAS infrared satellite and imaged in 1984 from the Las Campanas Observatory, it is one of the most studied circumstellar disks. Researchers are now using the new findings to better understand the early stages of planetary system formation, including the history of our own Solar System.