Answer :
Expansion and dark energy will have significant impacts on our sky in the future:
1. **Redshift of Distant Galaxies:** As the universe expands, galaxies move away from each other, causing their light to stretch towards longer wavelengths. This results in the redshift of light from distant galaxies, making them appear more red and moving away faster from us.
2. **Fading of Galaxies:** Due to the accelerated expansion driven by dark energy, galaxies that are currently visible may eventually move beyond the observable universe. Over time, this could lead to a decrease in the number of visible galaxies in our sky.
3. **Isolated Milky Way:** The Milky Way galaxy, where our solar system is located, may become more isolated as other galaxies move farther away. This isolation could result in a dimmer night sky with fewer neighboring galaxies visible.
4. **Darkness of the Universe:** In the distant future, the continued expansion and acceleration caused by dark energy could lead to the universe becoming increasingly dark. The separation between galaxies will widen, making it harder to observe other celestial objects beyond our local group of galaxies.
In summary, the effects of expansion and dark energy will gradually transform our sky, leading to a redder hue in distant galaxies, the fading of visible galaxies, a more isolated Milky Way, and a potential darkening of the universe as galaxies move farther apart.
