Islamophobists claim that Muhammad (s.a.w) was an imposter. Did he find this from a library 1430 years ago … and collect them into the Qur-an?

Islamophobists claim that Muhammad (s.a.w) was an imposter. Did he (Muhammad s.a.w) find this from a library in Dark Europe or Global USA 1430 years ago … and collect them into the Qur-an?

The Constellations Sun and Moon.

The Bible tells us that the sun and the moon just as two lights of differing size.

The Qur’an tells of constellations (buroojan); and differentiates the sun from the moon by using distinguising terms: the moon as light (noor), and the sun as lamp (siraaj).

Blessed is He Who made constellations in the skies, and placed therein a Lamp and a Moon giving light; The Devine Qur-an 25:61

And made the moon a light in their midst, and made the sun as a (Glorious) Lamp? The Divine Qur-an 71:16

Where did Muhammad s.a.w. get this knowledge of astronomy from?

Did he have radio telescopes and space travel gears to scientifically collect data that the sun as “alive” burning itself to produce heat and light; that the moon as a “dead” hunk reflecting light; and that all these are part of a constellation?