No they don’t. They depend on the earths orbit. The take a measurement and then 6 months later they take another one.
Do you even think before you type? What you wrote makes absolutely no sense.
To judge the distance from an object through triangulation we need at least two
known points in space. Just like how GPS does not wok with only one broadcasting beacon. GPS needs multiple beacons with
known locations to triangulate its position.
Astronomers can't simply measure the angle of a sun on January 1st and then measure it again on July 1st to get a distance. Before starting the experiment the distance from the sun should be considered
unknown to begin with. An astronomer can't rely on a second angular position of the sun if they don't know how far away it even is. For all they know the sun is millions of miles in diameter, a parsec away, and moves at fractions of the speed of light.
Go over to physicsforums.com which is full of real doctors and tell them the earth is flat because a old ass book said so and see what they say.
Maybe
you should go over to that forum and ask them to explain basic physics to you. It's apparent that you know very little.
Don't even bring up that elementary school notion about being able to 'bounce lasers off the sun' either. Unless you have a laser can can output more power per square inch than the sun it's completely impossible.