[Verginius Rufus]

Never saw the mnemonic before. Had to learn the planets' names the hard way. Actually it doesn't take much effort to learn and remember them.

For the order of the main sequence stars, on the other hand, the mnemonic is useful (O be a fine good kiss me right now, sweetheart). (I think I remember that right from decades ago.)

I had the privilege of hearing Clyde Tombaugh give a lecture--he was elderly at the time but still full of enthusiasm for astronomy.

[BipolarBob]

If we won’t speak up for the Plutonians, who will?