If earth were orbiting the sun, we would see different constellations every 3 months.
Globers respond by saying that constellations *do* change. We see some seasonal asterisms, such as Orion. But we have year-round asterisms, like the Big Dipper in the North and the Southern Cross in the South, that are visible year-round. And of course Polaris keeps his eternal watch above magnetic North!
This would be impossible on a globe. Globers like to say, “But the stars are really far away!” Distance doesn’t matter. If we’re facing the opposite direction of a star, we wouldn’t be able to see it. No matter the distance.
If you have a suggestion on how to explain this, please leave your idea in the comments. Thanks! Stacey