Black Hole-chan refers to the Moe Anthropomorphization of a black hole. While the character saw some spread alongside characters like Earth-chan in late 2017 and early 2018, the publication of the first image of a black hole caused many more artistic renditions of the character to appear online.
The character saw more spread alongside the rise of Earth-chan in late 2017 and early 2018. One of the most prolific artists of Black Hole-chan was BSA Apricot, who posted numerous popular pieces that winter.
After the first image of a black hole appeared online, the character saw a surge online, appearing in more artwork across social media. Again, BSA Apricot helped the spread of the character, posting two comics to Twitter and gaining 2,800 retweets and 9,500 likes (shown below).
Other popular pieces featuring the character include a post by Instagram artist taymabe, who gained over 150 likes, (shown below, left) and Twitter user @unkomoreso720, who gained over 4,600 retweets and 13,000 likes (shown below, right).