How does earth’s rotation affect our view of stars?

First, the first stars will revolve and move from east to west. So the planets and the Moon. ... Because of the Earth's orbit, we see different constellations at different times of the year. They rise, peak, and set as the Earth moves through its orbit in space.

Scientists have long known that the speed of light can be slowed slightly as it travels through materials such as water or glass

Explanation:

Scientists have long known that the speed of light can be slowed slightly as it travels through materials such as water or glass. ... They have demonstrated that applying a mask to an optical beam to give photons a spatial structure can reduce their speed.