Here’s what they say specifically:

“Twenty years ago this month, astronomers announced the discovery of 51 Pegasi b, the first confirmed planet orbiting a Sun-like star. The hellish gas giant orbits just beyond the searing heat of its parent star, and it opened astronomers’ eyes to the astonishing range of alien worlds that exist throughout the Galaxy.”

So maybe they have a specific definition of “confirmed” in mind.
“The IAU definition of planet among many other severe flaws breaches the Copernican principle by stating all planets must orbit our sun which is frankly ridiculous.”

LOL

As a sidenote, I think there were also competing claims of an earlier planet or brown dwarf around another star the orange giant Gamma Cephei or Errai A which was thought to exist in 19988 but not have a strongly proven enough case until later studies confirmed it’s existence.

There is also “Latham’s planet” or HD 114762 b which may be a superjovian world or a brown dwarf depending one its exact unknown orbital inclination found in 1989 around an F9 type Procyonese – but low “metalicity” subdwarf – star.

So, its complicated but basically yeah except for the pulsar planets!

Still great article though.

—-

* The IAU definition of planet among many other severe flaws breaches the Copernican principle by stating all planets must orbit our sun which is frankly ridiculous.