Ok so we revolve around the sun. At nighttime in January we face away from the sun to see the nighttime sky and stars.
6 months later in July we’re on the opposite side of the sun and now again at nighttime we face away from the sun.
But this direction is now 180 degrees away from the January direction… but the nighttime sky is still the same
How is that possible
The nighttime sky is not the same. You see different constellations in summer than you do in winter.
The stars appear above the horizon about 4 minutes later each day. There are stars at your particular latitude that are always visible (they never set), and they appear to rotate around the celestial pole. If you took note of their positions carefully at a particular time of night, you would see that they end up being 180 degrees opposite where they were 6 months previous.
If you’re talking about the pattern of stars shifting against the more distant background of stars (star parallax), when the earth is at opposite sides of the sun, this is measurable by observatories for stars within a hundred light years or so but the angular change quickly becomes very small and the universe is very big.
This resurfaced a really old memory from when I was like 8 or 9 maybe.
We had a homework assignment (kind of) for school, where we had to go out and pick a star from a spot in our backyards or wherever, and then for each night over 2 weeks we had to track the stars position relative to our position we chose on night 1.
This was around the late 90s by that point, and I always thought it was pretty cool to get our young imaginations going on the stars beyond ☺️