This article has been reviewed according to Science X's editorial process and policies. Editors have highlighted the following attributes while ensuring the content's credibility: In the early history of our solar system, scientists theorize that a Mars-sized object called Theia smashed into the infant Earth, vaporizing massive amounts of rock and blasting it into space. Some of that material coalesced into the moon, where NASA's Artemis program is returning humans, preparing for Mars and shaping the future of space exploration.
That long-ago, violent collision reshaped our home planet. Astronomers have used NASA's James Webb Space Telescope to examine a class of young stellar systems that show signs of similar upheavals, providing clues to the amount of energy in their collisions. The results offer insights into the composition and evolution of these chaotic systems.
The team's findings were published Thursday in The Astrophysical Journal. The environment surrounding a star changes as it ages, beginning with a juvenile, gas-rich protoplanetary disk where forming planets can reside, before evolving into a gas-poor debris disk. During its mission lifetime, NASA's retired Spitzer Space Telescope examined the debris disk stage and discovered a subclass termed extreme debris disks.
These systems harbor unusually large amounts of warm dust close to the star, in a region comparable to where rocky planets orbit in our solar system. A team of astronomers led by Kate Su of the Space Science Institute in Boulder, Colorado, investigated these intriguing objects with Webb. Contrary to theoretical predictions, which suggest we should observe many extreme debris disks, observations indicate that these environments are rare.
Based on the data collected so far, scientists estimate that only roughly 1% of young stars show observable signatures of this phase. Our own solar system may have experienced this phase during its formation. Despite their rarity, the team was able to compile a sample of 21 extreme debris disks, including five from Spitzer's archival data and 16 from Webb, with 12 newly observed disks and follow-up observations of four of Spitzer's.
"This is the first time we have gathered enough systems to truly understand this subclass that we call extreme debris disks," said Su, lead author of the paper. "Before Webb, we had limited information. We knew that they are weird and very different from the typical cold debris disks that we know, like Vega and Fomalhaut.
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