Twinkle Twinkle Little Star
I know exactly what you are
Opaque ball of hot dense gas
Million times our planet's mass
Looking small because you're far
I know exactly what you are
Fusing atoms in your core
Hydrogen, helium, carbon and more
With such power you shine far
Twinkle twinkle little star
Classed by their spectroscopy
Oh, Be A Fine Girl Kiss Me
Bright when close and faint when far
I know exactly what you are
Smallest ones burn cool and slow
Still too hot to visit, though
Red stars dominate by far
Twinkle twinkle little star
Largest ones are hot and blue
Supernova when they're through
Then black hole or neutron star
I know exactly what you are
Our Sun's average as stars go
Formed 5 billion years ago
Halfway through its life so far
Twinkle twinkle little star
Forming from collapsing clouds
Cold and dusty gas enshrouds
Spinning, heating protostar
I know exactly what you are
Often forming multiply
Clusters bound by gravity
Open type or globular
Twinkle twinkle little star