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Hubble Telescope sees cosmic 'cat's tail' that could wrap around Earth and the sun 500 times
"It's a testament to how much these massive planets really influence their surrounding dust and icy bodies out to hundreds of astronomical units."
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Using the Hubble Space Telescope, astronomers have investigated a cosmic cat's tail, finding it likely formed after two Pluto-sized bodies smashed together.
The feature, nicknamed the Cat's Tail, extends out from the debris disk known as Beta Pictoris which is located in a planetary system located 63 light-years away. This tail would put that of the average tabby to shame: It's so long that it could curl around the sun-Earth system about 500 times. That's about as long as 200 trillion house cats.
The major difference between our solar system and the planetary system that hosts the Cat's Tail is the latter's relative youth. While our solar system is around 4.6 billion years old, Beta Pictoris is a cosmic kitten no more than a few million years old. That means it is still host to collisions between planetary bodies similar to the ones that rocked the solar system during its infancy.
The team behind this research gained new insights into the Cat's Tail using 14 years of observations. This allowed them to solve the long-standing mystery of the violent conditions under which it formed.
"The Cat's Tail is thought to be the aftermath of a collision between large bodies — think something like Pluto," team leader Arin Avsar of the University of Arizona said in a statement. "Oddly, this feature had previously only been seen with the James Webb Space Telescope (JWST), which detects infrared light, but remained invisible at shorter wavelengths, which has puzzled the community for a while."
Comparing Beta Pictoris and our solar system, one thing rapidly becomes apparent: our cosmic neighborhood is relatively well-ordered. The planets orbit the sun with most space rocks neatly delegated into bands: the main asteroid belt between Mars and Jupiter, and the Kuiper belt out beyond the orbit of Neptune.
However, this is a stark contrast to the solar system's violent and chaotic youth. Back then, the solar system was host to an infant star surrounded by a swirling disk of gas and dust in which collisions between bodies called planetesimals — the building blocks of planets — were commonplace.
Astronomers can't look back to the solar system's infancy, so to learn more about how our cosmic backyard took shape, they study nearby young planetary systems. Systems like Beta Pictoris. That doesn't mean it has been quick to divulge its secrets, though.