Answer:
The word "protracted" means lasting longer than expected, or unusually long, so what protracted most clearly means based on the context of the excerpt is how the time period of celestial motion studies must have lasted unusually long.
A random order because I just had it on my test
El machismo en Puerto Eico es responsable de que los hombres sean violentos yo creo que no por que pues los valores son del hombre puedes estar en cualquier lugar y si el vato es una basura no ahí acomodación
<span>Let's Bury The Hatchet
</span>
For something to be "no longer under consideration" means that its not up to discuss. like theres nothing more to talk about