Hey! So just around an hour ago 50 badges now show as retired.
I compiled a list of them:
Meteorite Badges that are now retired (20 total):
Thumbs up, Thumbs Down, Flag Duty, Express Yourself, Tinkerer, Researcher, Bibliographer, Good Habits, Inspired 15 Minutes, Makes perfect, Five is Alive, Challenge Accepted, High Five, Hang Ten, Fingers or Toes, Perseverance, Virus, Inspiration, Great Streak, and Awesome Streak
Moon Badges that are now retired (9 total):
Power Hour, Astute Analyzer, Excellent Teacher, Good Question, Geek of the week: Mastery, Good Inspiration, Ridiculous Streak, Ludicrous Streak, and 1000 Kelvin
Earth Badges that are now retired (15 total):
Investigator, Guru, Five times ten to the fifth, Double Power Hour, Rave Reviewer, Incredible Teacher, Sensei, Great Inspiration, Incredible Inspiration, Great Question, Incredible Question, Helen Keller, Ridiculous Listener, Sub Light Speed, and 299,792,458 Meters per Second.
Sun Badges that are now retired (6 total):
Millionaire, Oracle, Detective, Da Vinci, Ramanujan, and Ludicrous Listener
No Black Holes were retired and I can't see any Challenge patches that were retired.
Here's a screenshot showing them retired:
I also think it's really odd how certain badges of a set are retired but others aren't. Similar to how Da Vinci is retired but the other mastery badges are not:
Another example of this is how Ludicrous listener and Ridiculous listener were retired but not Awesome Listener.
I'm not sure if this was a mistake or not but there's now only a total of 48 badges left to earn: 18 Meteorite, 13 Moon, 8 Earth, 6 Sun, and 3 Black Holes as opposed to the 98 total before.