Group Editing Challenge – Finding Neptune

I need YOUR help to fix my mistakes.  Whether you can find them all or just one, learners from any level are welcome.  Review ALL that old grammar, punctuation, spelling, and much more ALL at once for ultimate English MASTERY (don’t forget the speaking and listening practice, too).  Just $5 for 55 minutes!

How many mistakes can you find?

Neptune the eight planet to the Son was discovering on September 23, 1846.  French Astronomer Urbain Le Verrier, whom had been studyied disregularities in the movement of Uranus he believed was caused by strong gravitational interference.  Calculated approximate location of a new, theory planet.  She than enlisted help form a colleague on the Berlin Observatory, Johann Gottfried Galle, that spended twentyfor ours scrutinizing the area, talking notes one one slightly-blue lights odd behavior.  They’re named there discovery after the Rome god of the see.  Today we know these gas giant it’s four times largest than Earth, eight moons, and is windiest planet in the solar system.  Neptune visited by the Voyager 2 spacecraft on 1989?