Three double dactyls.
 

The standard double dactyl rhymes AA-b-c-D, e-f-g-D. These ones have a full rhyme scheme instead, AA-B-C-D, EE-B-C-D, which is more fun to write, but results in fewer of them. The opening double rhyme is also intended to be part of the poem rather than simply nonsense.
 

The first was posted in Pffa in Scansion Mansion under the thread Metrical Challenges #8 , which called for a double-dactyl on a space topic. If you don’t already know, the Hyades were five, six or seven daughters of Atlas (no mother attributed) and their name means either ‘rainers’ (for the season of their heliacal rising) or possibly ‘piglets’, and Zeus made them into a constellation as reward for nursing Dionysos. The Pleiades were seven daughters of Atlas and Pleione (‘Sailing Queen’) and so half-sisters of the Hyades (and the Hesperides). Zeus made them into a constellation to save them from Orion’s lustful pursuit. Both constellations are in Taurus.

HYADES PLEIADES

Hyades Pleiades -
here are the nominal
sisters celestial,
rainy or chased.
If you please, why are these
astrophenomenal
ladies so bestial,
so Bull-embraced?

     2002
 

From NaPo 2005, day 18

HERAKLES PERIKLES

Herakles Perikles
queuing on Styx’s wharf
argue they understood
there’d be no fee.
‘Wherryman! Ferryman!
Diplodactylimorph
hoodlums and pollies should
go to hell free!’

     2005
 

From NaPo 2007, day 8

VENISON BENISON

Venison benison!
Wildwood economy
turned into property,
sold for our use!
Joyfully join in the
ecogastronomy -
chop of the wapiti,
chocolatey moose!

     2007