Welcome to the Black Hole Badges tips. According to Khan Academy, Black Hole badges are legendary and unique. 4 out of 5 are still impossible for most users to earn and their requirements are unknown.
To earn Tesla, users have to earn 10,000,000 energy points. One way to get the badge is to watch at least 5000 videos and acquire at least 300 299,792,458 Meters per Second badges in exercises. This is the only Black Hole badge that does not give users any energy points when obtained.
To earn Atlas, users have to master an unknown amount of unique skills (used to be 150, then 500, and now is believed to be 1500, however, every time Khan Academy reaches the Atlas requirements they highly increase it). Ben Eater has this badge and there is a rumor that he accidentally gave it to himself.
To earn Artemis, users need to master 2000 skills; however, this is only speculation.