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Rogue Planet Cha 1107-7626 Undergoes Record Accretion Burst Detected by JWST and VLT

The free-floating world about 620 light-years away is gulping material at roughly 6 billion tonnes per second, revealing star-like, magnetically driven growth.

Overview

  • Astronomers report an eightfold jump in the object's feeding rate over just months, with measurements peaking by August 2025.
  • The planetary-mass body is estimated at 5–10 times Jupiter’s mass and is only about 1–2 million years old.
  • Researchers say the episode marks the strongest accretion recorded for a planetary-mass object, based on data published in The Astrophysical Journal Letters.
  • Evidence points to magnetic processes guiding the inflow of gas and dust, behavior previously associated with young stars.
  • Comparisons with earlier observations suggest a similar outburst in 2016, and teams are planning follow-up campaigns to gauge how often and how long these bursts occur.