What is the meaning of Revelation 6:12?

* The two F.O.G. Bibles & Commentary below are currently a work in progress.

And when I saw the Lamb open the sixth seal, there was a great earthquake, and the sun became black like sackcloth of goat hair, and the whole moon turned blood red,

Berean Standard Bible (BSB)

I saw when he opened the sixth seal, and there was a great earthquake. The sun became black as sackcloth made of hair, and the whole moon became as blood.

World English Bible (WEB)

And{G2532} I beheld{G1492}{(G5627)} when{G3753} he had opened{G455}{(G5656)} the sixth{G1623} seal{G4973}, and{G2532}, lo{G2400}{(G5628)}, there was{G1096}{(G5633)} a great{G3173} earthquake{G4578}; and{G2532} the sun{G2246} became{G1096}{(G5633)} black{G3189} as{G5613} sackcloth{G4526} of hair{G5155}, and{G2532} the moon{G4582} became{G1096}{(G5633)} as{G5613} blood{G129};

Strong's King James

(12) I looked when He broke the sixth seal and there was a great earthquake, the sun became black as sackcloth hair and the full moon became like blood.

The F.O.G*

[12] I watched as He broke the sixth seal, and there was a massive earthquake! The sun turned black like sackcloth made of goat hair, the whole moon became like blood,

The F.O.G Paraphrase

And I saw when he opened the sixth seal, and lo, a great earthquake came, and the sun became black as sackcloth of hair, and the moon became as blood,

Young's Literal Translation