Þula lists of poetic names (heiti) for the sky (hlýrnir, víðbláinn, etc.), the sun (sunna, röðull, Dvalinn's toy) and the moon (máni, ártali). Snorri warns to use only those heiti attested in the chief skalds.
Þessi nöfn himins eru rituð, en eigi höfum vér fundit í kvæðum öll þessi heiti. En þessi skáldskaparheiti sem önnur þykkir mér óskylt at hafa í skáldskap, nema áðr finni hann í verka höfuðskálda þvílík heiti.
These names of the sky are written down, but we have not found all these heiti in poems. And these poetic names, like others, seem to me improper to use in poetry unless one first finds such names in the works of the chief skalds.
Himinn: hlýrnir, heiðþorrnir, hreggmímir, andlangr, ljósfari, drífandi, skatyrnir, víðfeðmir, vetmímir, leiftr, hrjóðr, víðbláinn.
Sky: hlýrnir, heiðþornir, hreggmímir, andlangr, ljósfari (light-farer), drífandi (the drifting one), skatyrnir, víðfeðmir (wide-embracer), vetmímir, leiftr (lightning), hrjóðr, víðbláinn (the wide-blue).
Sól: sunna, röðull, eyglóa, alskír, sýni, fagrahvél, líknskin, Dvalins leika, álfröðull, ifröðull, mylin.
Sun: sunna (the sun), röðull (radiance-ring), eygló (the ever-glowing), alskír (the all-bright), sýni, fagrahvél (the fair wheel), líknskin (mercy-shine), Dvalins leika (Dvalinn's toy — the dwarf is turned to stone by the sun), álfröðull (elf-beam), ifröðull, mylin.
Tungl: máni, ný, nið, ártali, mulinn, fengari, glámr, skyndir, skjálgr, skrámr.
Moon: máni (the moon), ný (new moon), nið (waning moon), ártali (year-teller), mulinn, fengari, glámr, skyndir (the hastener), skjálgr (the oblique one), skrámr.