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  • RESEARCH HIGHLIGHT

A featherweight baby planet is fading away with age

The gas planet has a density less than 2% that of Earth ― and is gradually shedding mass.
An artist's impression of exoplanet HIP 67522 b in space

The gaseous world called HIP 67522 b (artist’s impression), one of the wispiest exoplanets ever found, whips around its star in just seven days. Credit: NASA/JPL-Caltech/R. Hurt (IPAC)

A young planet named HIP 67522 b is one of the lowest-density worlds ever spotted1.

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Nature 636, 525 (2024)

doi: https://doi.org/10.1038/d41586-024-04011-y

References

  1. Thao, P. C. et al. Astron. J. 168, 297 (2024).

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