"Black Hole Sun" is a song by American rock band Soundgarden. Written by frontman Chris Cornell, the song was released on May 23, 1994, by A&M Records as the third single from the band's fourth studio album, Superunknown (1994). Considered to be the band's signature song, it topped the US Billboard Album Rock Tracks chart, where it spent a total of seven weeks at number one. Despite peaking at number two on the Billboard Modern Rock Tracks chart, "Black Hole Sun" finished as the number-one modern rock track of 1994. Worldwide, the single reached the top 10 in Australia, Canada, France, and Ireland, while in Iceland, it reached number one.

The single's accompanying music video was directed by Howard Greenhalgh and received the award for MTV Best Metal/Hard Rock Video at the 1994 MTV Video Music Awards. "Black Hole Sun" was included on Soundgarden's 1997 greatest hits album A-Sides; it also appeared on the 2010 compilation album Telephantasm. In 2021, Rolling Stone magazine ranked "Black Hole Sun" number 368 on their list of the 500 Greatest Songs of All Time.

"Black Hole Sun" was written by frontman Chris Cornell. In 1994, Cornell explained the song's origins to Uncut Magazine:

I wrote it in my head driving home from Bear Creek Studio in Woodinville, a 35–40 minute drive from Seattle. It sparked from something a news anchor said on TV and I heard wrong. I heard 'blah blah blah black hole sun blah blah blah'. I thought that would make an amazing song title, but what would it sound like? It all came together, pretty much the whole arrangement including the guitar solo that's played beneath the riff. I spent a lot of time spinning those melodies in my head so I wouldn't forget them. I got home and whistled it into a Dictaphone. The next day I brought it into the real world, assigning a couple of key changes in the verse to make the melodies more interesting. Then I wrote the lyrics and that was similar, a stream of consciousness based on the feeling I got from the chorus and title.

Cornell said that he wrote the song in about 15 minutes. He used a Gretsch guitar to write the song, and commented, "I wrote the song thinking the band wouldn't like it—then it became the biggest hit of the summer." Cornell came up with the song while using a Leslie speaker. Guitarist Kim Thayil said that the Leslie model 16 speaker was perfect for the song as "it's very Beatlesque and has a distinctive sound. It ended up changing the song completely." Thayil said that the song "wasn't safe as milk, but it wasn't glass in someone's eye either. It was the spoonful of sugar that helps the medicine go down. Now it's the 'Dream On' of our set." The song was performed in a slightly sharp drop D tuning, similar to the tuning used on the band's first single, "Hunted Down". Drummer Matt Cameron called the song "a huge departure". Credit is due to Michael Beinhorn and Brendan O'Brien, producer and recording engineer, respectively.

Appearing on The Pods & Sods Network in July 2017, Beinhorn detailed the process of recording Superunknown and shared his reaction to first hearing "Black Hole Sun": "I think for the rest of my entire life, until I draw my last breath, I'll never ever forget how I felt when they started playing that song. From the very first few notes, I felt like I'd been hit by a thunderbolt. I was just absolutely stunned. What in the world is this? I get goosebumps thinking about it now."

Musically, "Black Hole Sun" has been described as grunge, psychedelic rock, alternative rock, hard rock, and stoner rock. Regarding the song's lyrics, Cornell stated, "It's just sort of a surreal dreamscape, a weird, play-with-the-title kind of song." He also said that "lyrically it's probably the closest to me just playing with words for words' sake, of anything I've written. I guess it worked for a lot of people who heard it, but I have no idea how you'd begin to take that one literally." In another interview he elaborated further, stating, "It's funny because hits are usually sort of congruent, sort of an identifiable lyric idea, and that song pretty much had none. The chorus lyric is kind of beautiful and easy to remember. Other than that, I sure didn't have an understanding of it after I wrote it. I was just sucked in by the music and I was painting a picture with the lyrics. There was no real idea to get across." Commenting upon how the song was misinterpreted as being positive, Cornell said, "No one seems to get this, but 'Black Hole Sun' is sad. But because the melody is really pretty, everyone thinks it's almost chipper, which is ridiculous." When asked about the line, "Times are gone for honest men", Cornell said:

It's really difficult for a person to create their own life and their own freedom. It's going to become more and more difficult, and it's going to create more and more disillusioned people who become dishonest and angry and are willing to fuck the next guy to get what they want. There's so much stepping on the backs of other people in our profession. We've been so lucky that we've never had to do that. Part of it was because of our own tenacity, and part of it was because we were lucky.