Planet… or star? 🤔 Right on the edge, 29 Cygni b blurs the line. At 15 times Jupiter’s mass, it could have formed either way… but @esawebb reveals it likely grew like a planet, piece by piece from dust and rock. Even the biggest worlds have humble beginnings. 📹 @europeanspaceagency 🎞️ @NASA, ESA, @canadianspaceagency, J. Olmsted (@space_telescopes), @creativecommons BY 4.0; NASA/ @nasagoddard; NASA/Goddard Space Flight Center and @ncsaatillinois; ESASky; NASA, ESA, CSA, W. Balmer (JHU, STScI), L. Pueyo (STScI). Image processing: A. Pagan (STScI); ESA/ATG medialab; William O. Balmer, Laurent Pueyo, Ashley Messier, Evelyn Bruinsma, Jeremy Jones, Klara Matuszewska, Marshall D. Perrin, Julien H. Girard, Jarron M. Leisenring, Kellen Lawson, Roeland P. van der Marel, Jens Kammerer, Aarynn Carter, Mathilde Mâlin, Kimberly Ward-Duong, Kielan K. W. Hoch, Emily Rickman, and Sara Seager 🖥️ NASA, ESA, CSA, J. Olmsted (STScI)