EDIT 2: On Falling In

[Magpie]

Although I definitely think it has moved on since the first draft, I don't think it quite captures exactly what you originally intended. Though to be honest, I'm not sure if I fully know your intentions, I get the implications and comparisons with a black hole and how the shape of the poem leads to your singularity. However there are parts that confuse me somewhat, but that may just be me.

Unending verdant fields and the twinkle of fireflies
spiral in orbit around a country cottage reflecting
the sun's rich amber on cedar siding at dusk
just before the atrophy of summer's afterglow. --- I do think that this first stanza is beautiful and I understand why it is so long, I just think that it's a tiny bit too long--- I struggle to say it all in one breath, a comma or two may help or even just some extreme condensing. eg "and twinkling fireflies" you could even lose "twinkle" altogether, it doesn't tell us anything we don't already know about "fireflies/stars" -- if they are stars??? If so then 'scintillation' would be more correct.

Nebulae of green surround the silhouette --- Would 'nebulous' be better here or do you actually mean more than several green nebula?
created by a rural cabin's eclipse
of the fading sun drifting
below summer's horizon. --- You already established that it's summer in the first stanza.

Earthen tones accrete around
unnatural shape then collapse
into perpetual darkness.  --- This is the stanza that confuses me the most, I'm left wondering what the 'unnatural shape' is? Is it the rural cabin? Or something else?

Light meets darkness
as form softens.

A Light
and a Dark. Darkness|
light.                        ---- Too many "light/dark" in these last two stanzas and although they seem to cancel each other out, which kind of makes sense heading towards a singularity, it also seems unnecessarily repetitive. Also this stanza messes up the shape of the poem which was perfect up until this point.

singularity --- Depending on how you do the previous stanza you may want to spell 'singularity' out as one letter per line, or is that a bit corny? not sure.

I do think it's a really difficult concept that you are trying to capture here, but I admire and appreciate how you are approaching it. The beginning seems more prose than poetry, although there's nothing wrong with beautifully written prose, I'm not sure if it's working here.

Cheers for the read,
Mark