Could you move so far away from an object there would be no parallax?

Question

No homework. Thank you.

Answer 1

No, but you could move far enough away that the parallax would become arbitrarily small, and could not be detected by a given device. If you're talking about parallax with just your own vision, then distant objects in your field of vision are often far enough that you don't notice the parallax. If you were specifically looking for it, though, you might still be able to spot it. Looking at a star in the sky, the parallax due to your two eyes is infinitesimally small, but still finite and existent. The parallax due to the Earth's orbit around the Sun, on the other hand, is much larger; it can be measured by astronomers and is used to determine how far the object is from Earth. This, too, has its limits. It works well for stars in the Milky Way, but distant galaxies are so far that even this overwhelmingly larger parallax cannot be adequately measured, even though it, too, still exists.

Answer 2

In theory, no, but there are practical lower limits to the angles that can be distinguished. For example, Rigel in Orion is a little too distant to be accurately assessed by parallax. Increasing the baseline (for example, having a telescope in solar orbit as distant as Jupiter or Saturn) would enable more precise measurements.

Answer 3

NO.