Final answer:
The star would appear bright and twinkling to Jane, while it would appear dim and fading to John. The difference is due to varied atmospheric conditions.
Step-by-step explanation:
The star would appear bright and twinkling to Jane. This is because the light from stars goes through the Earth's atmosphere, causing it to twinkle. The star would appear dim and fading to John. This is due to atmospheric conditions and the star's distance from Earth. The difference in how the stars appear to Jane and John is primarily due to varied atmospheric conditions. The Earth's atmosphere can cause the light from stars to twinkle and appear differently to different observers.