On Oct 31, 4:54*am, oriel36 wrote:

If Brian here fixes his telescope on a star in the constellation Ursa
Major and allows it to track that star,he then looks at his telescope
and will notice that the telescope mount becomes the axis of
rotation,homocentricity in other words.

The effects of parallax are small, but when we neglect them, we do so
with open eyes, and are fully aware that they do exist. When they are
relevant, we take them into account. So your charge against
conventional astronomy is invalid.

John Savard