is the "orion belt stars" always seen?

It is accidentally the belt of orion 'the famous 3 stars nicely in a row' lie on the 'celestial equator'. This means they always rise exactly in east and set exactly in west.

How high they climb on the sky is dependent on the latitude of the observer on earth.

But on both poles, they ride along the horizon. For someone on the equator, they climb straight above him (in zenith). So actually, everyone can see them. Of course at night.
 
they are above the horizon (with the exception of the extreme norht and extreme south, since orion's belt is virtually on the celestial equator) about 50% of the time.

but sometimes the sun is in the sky (say, july, for example) when they are above the horizon. so they obviously cannot be seen at that time.

and the can never be seen when below the horizon.

but, assuming you could see 2nd magnitude stars during the daytime, any star "on" the celestial equator, would theoritically be visible daily fromeverywhere on the earth.
 
Although Orion can be seen from most locations on the Earth's surface (it's pretty low in the sky from Antarctica), there are times when the Earth lies on the opposite side of the Sun from the region in the sky where Orion is located. At those times (in the northern summer), you have to look past the Sun to see it. Clearly, the glare of the Sun prevents any view of the constellation. It can be seen at some time of the night at any other time of year.
 
Think logically.

The Earth is orbiting the sun, so it is sometimes nowhere near where the stars are visible half of the time.

Not only that, but because the Earth is a sphere, the southern hemisphere will never see it.

See how far basic logic can get you?
 
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