"The sun and the moon..."
"Daylight and starry sky?" Rogel frowned slightly: "I knew there had to be a world of daylight somewhere in this world... But why is there no perception of it? Is it because it's hidden deeper? Or has it perished in the disaster?"
Within the information given by the hint.
The Rambler used "they," which confirms that the sun and moon in the sky are two different entities.
And that star-filled world over there should be the starry sky mentioned later, so the sun on the other side must likely possess its own unique world of "daylight."
Of course, this is just Rogel's conjecture.
[However, as beings like you, their relationship seems to be not so harmonious.]
[Because you see that at the border of their powers, countless rays of light and starlight fall like meteors, impacting the Earth.]
[This results in numerous craters and everlasting flames on the ground, with various splendid minerals burning at their edges.]
