This is so fun: my friends Zach Weinersmith of SMBC and Henry Reich from Minute Physics have written an astronomically corrected version of the song “Twinkle Twinkle Little Star” for kids!
They also put together a totally adorable short video with Henry singing the song:
When I first saw it I thought I saw a mistake in it, but I was wrong. I point it out so others don’t misunderstand it the way I did. The lyric is about a pulsar: “Out away from Earth your drift, this is known from your redshift.” I mistook this line to say we know its distance from its redshift, but that only works for very distant galaxies, not pulsars, which are inside our own galaxy. But I misunderstood; they’re saying we know it’s moving away from Earth by its redshift, and that’s technically correct. So there.
Anyway, this has come out just in time for the holidays. Go buy it, and turn more kids into little science pedants!