Question

question ①
in which of the following models is stellar parallax observed and possible?
answer
i dont know yet
ptolemys model
tycho brahes model
aristotles model
copernicuss model

Explanation:

Stellar parallax arises from Earth's orbital motion around the Sun. Geocentric models (Aristotle's, Ptolemy's) lack Earth's orbit, so parallax is unobservable. Heliocentric Copernicus's model, with Earth orbiting the Sun, allows parallax observation. Tycho Brahe's hybrid model didn't accept Earth's motion.

Answer:

Copernicus's model