Jack White and Slash may both be indisputable modern rock guitar heroes, but a possible collaboration between the two was recently nixed by White, according to a MusicRadar interview with Slash. (Via NME.)

"I wanted to get Jack White to sing on something, but he didn't want to sing," said Slash. "He said, 'I'll play drums, I'll play guitar, but I don't wanna sing.' He was one guy that I wanted to work with. Pretty much everyone else that I went after I managed to get." So now we know Jack White does not just say yes to every offer he gets.

NME reports that Flea, Dave Grohl, and Alice Cooper are all set to guest on the Slash LP, which is due out next year.

In other White news, the singer/guitarist/label magnate is apparently fed up with Weezer's stranglehold on WTF music news, so he's releasing a 7" of ["A Glorious Dawn"](http://www.youtube.com/watch?v=zSgiXGELjbc ""A Glorious Dawn"" ) on his own Third Man Records November 9. "A Glorious Dawn" is a recent YouTube hit mixed by composer John Boswell featuring spaced-out eggheads Carl Sagan and Stephen Hawking talking about the great beyond beneath a layer of AutoTune. The oddball track starts with this Sagan gem: "If you wish to make an apple pie from scratch you must first invent the universe." So deep, so true!

Third Man is pressing an extra special 150-run limited edition "Cosmos Colored Vinyl" version of the record, featuring the etching from the Voyager Golden Record on one side. The Voyager Golden Record was originally sent into space in 1977, in an attempt to communicate with extraterrestrial life. The potentially intergalactic record featured greetings in different languages, sounds of wind and rain, and songs including "Johnny B. Goode", and Third Man favorite "Dark Was the Night" by Blind Willie Johnson. The contents of the Golden Record were chosen by a committee headed by Sagan.

No word if aliens have received the disc at press time.

Check out the amazing "A Glorious Noise" video after the jump:

Carl Sagan: "A Glorious Dawn" [ft. Stephen Hawking]