Witness the Birth of a Planet: Sigma Orionis Observed by ALMA

A scientific image of the Sigma Orionis star system, showing a bright central star surrounded by concentric purple rings against a black background. White text at the bottom identifies the object as 'Sigma Orionis, 1300 ly from Earth, SO 1274' and credits Jane Huang, Megan Ansdell, Tilman Birnstiel et al., CC BY 4.0. A scale bar labeled '20 au' is visible near the center.

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