Because in the summer the constellation would be in the daytime sky.
It is both, as Cassiopeia is one of the constellations that can be seen all year round.
This is caused by the earth's rotation around the sun. There are five constellations in the sky all year around, but the earth's rotational path will only allow us to observe the ones that are closest during that season's orbit.
ursa major
The winter night sky is the opposite direction from the summer night sky. The constellations you see in winter are on the other side of the sun in summer, so you would only see them in summer during a total solar eclipse.
Constellations can be seen throughout the year, but different constellations are visible during different seasons. For example, during summer in the Northern Hemisphere, constellations like Scorpius and Cygnus are prominent in the night sky, while in winter, Orion and Taurus are more visible.
In the northern hemisphere the constellations on the meridian on June 21 have a right ascension of 18 hours, and constellations from 15 to 18 hours can be seen in summer evenings. They are not as bright as the winter constellations. The main ones are Boötes (main star Arcturus), Corona Borealis, Serpens Caput, Libra, Hercules and Ophiuchus. In the southern sky, Scorpio (main star Antares). In the summer the circumpolar constellations like Cassiopeia, Ursa Major, Perseus and Draco can be seen although not in their usual winter positions.
Orion is visible in the night sky during the winter months in the Northern Hemisphere and in the summer months in the Southern Hemisphere. It is one of the most easily recognizable constellations and can be seen for much of the year from different parts of the world.
Because the constellations that are visible during winter are on the other side of the sun during the summer. During the year the earth spins around the sun like a big satellite. So while the earth is constantly moving, the distance that the stars are away from us cause them to look stationary from our point of view some constellations can only be seen a few months out of the year.
gemini leo stratus goe goe
Puppis is usually seen in late winter. The best time to see it is late January, or late February, at 11 pm. through 1 am.
They recede from sight due to the rotation of the earth at these times.
It depends on the specific constellation, but generally speaking, most constellations are best seen during the months when they are highest in the night sky. For example, Orion is best seen during the winter months, while Scorpius is best seen during the summer months.