Question

In Illinois, the constellation Orion can be seen in the night sky in winter. Why can this constellation not be seen in the summer?

Answer 1

Unseen Orion would be invisible in the day sky, during summer. Your night sky in winter has become day sky, after six months.

Explanation:

You are orbiting the Sun.

During night, you are looking away from the Sun.

Any day, the Earth is having in view diametrically opposite constellations, for the opposite hemispheres.

We view sky round the year, like viewing around from a merry-go-round.

in one round, we return to the same night-sky star-configuration.

In six months, this configuration would then become invisible, in the direction of the Sun,.as it is now day-sky configuration. .

For example, during April-May, the night hemisphere of the Earth is facing Taurus and day hemisphere is facing the opposite constellation Scorpio. After six months, it is reversed..