SMRTR Science & EngineeringJan 8, 2026Nautilus

What Baby Planets with the Density of Styrofoam Reveal

SMRTR summary

Astronomers found four baby planets around star V1298 Tau with styrofoam-like density—hundreds of times Earth's size but only 5-15 times heavier. These puffy planets are shrinking as they lose atmospheres.

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