As explained by the noted space nomenclature expert, Johanna Newsome:

You taught me the names of the stars overhead that I wrote down in my ledger

Though all I knew of the rote universe were those pleiades loosed in December

I promised you I'd set them to verse so I'd always remember

That the meteorite is a source of the light

And the meteor's just what we see

And the meteoroid is a stone that's devoid of the fire that propelled it to thee

-- from Emily - by Johanna Newsome