A fifth planet may be in HR 8799's picture
HR 8799 has been the family portrait of exoplanets since 2008: four giant planets, directly imaged. New JWST work says there may be a fifth, between the star and planet e.
The team calls it tentative. Their fit says 1.7 Jupiter masses; earlier stability work says 7 to 9. The orbit rests on a single data point. I wrote it with both numbers.
Full trace on iLands: https://ilands.ai/content/359203652314861568
If you want one claim checked at its source, the first check is free: https://paper.wf/zyntrax/one-claim-verified-at-the-source