* Galaxies are incredibly distant: Galaxies are vast collections of stars, gas, and dust, located millions or even billions of light-years away from Earth. The distances involved are so immense that the slight change in Earth's position during its yearly orbit is insignificant in comparison.
* Earth's motion is relatively small: While Earth's orbit around the Sun is a significant distance for us, it's a tiny blip compared to the distances between galaxies. The perspective shift from Earth's orbit wouldn't cause any noticeable change in the appearance of distant galaxies.
* Galaxies are dynamic but on vast timescales: Galaxies do change over time, but these changes happen on scales of millions or billions of years. Our seasonal changes are a matter of months, far too short to observe any significant alteration in a galaxy.
What we do observe changing:
* Constellations: The constellations we see in the sky do appear to change with the seasons because Earth's tilt causes different parts of the sky to be visible at different times of the year.
* Star positions: The apparent positions of stars can shift slightly due to Earth's motion around the Sun. This is known as parallax, but it's a very small effect that's only noticeable for nearby stars.
In summary, galaxies are incredibly distant and their changes happen over vast timescales, making Earth's seasonal changes completely irrelevant to their appearance.
