In astronomy zenith (the point in the sky exactly above you) is the point most distant from the horizon. As a horizon defines how far down the sky you can look, zenith defines how high up you can look.
Limitation
a horizon
Panorama does not have an antonym. However, the word "Panorama" is used to describe a long distance view with a wide horizon, as might be seen in an open landscape, and the word "Vista" is a long distance view with a limited horizon, as in looking down an avenue of trees. So, vista is a kind of antonym of panorama.
There's not a single cloud on the horizon. The expiration of the loan loomed like a dark cloud on their company's horizon.
it means that it goes to the horizon because the horizon looks like it meets the sky
atmosphere
The altitude of the highest point of the rainbow that you see is (42 degrees) minus (the altitude of the sun above the horizon behind you). If the sun is sitting right on the horizon ... just risen or just about to set ... then the highest point of the rainbow is about 42 degrees above the horizon opposite the sun. If the sun is higher, then the rainbow is lower, by the same amount. If the sun is more than about 42 degrees above the horizon, then any rainbow you might otherwise see is entirely below the opposite horizon, and you don't see one.
The star is considered rising. Also, it is setting when it is the opposite (moving from above the horizon to below.)
Measure the angular size of the moon and divide 180 degrees by the angular size.
they are relative because of the comets tail. opposite the sun. so they are relative upward
The "boundary" you're probably thinking of is called the event horizon. Past this point, the escape velocity of the black hole exceeds the speed of light, meaning nothing, including light, can escape it.
If the sun is setting, then the center of the rainbow is to the east of you, and on or slightly below the horizon ... directly opposite the sun.
The opposite of sunrise is sunset, which occurs when the sun sinks below the horizon in the evening.
a horizon
Horizon B
Lunar effects the tide to rise. The moon has its own gravity that rises the sea water. Water sips through the tunnel like holes from horizon to opposite horizon hence collecting more water on the side where the moon is facing.
O horizon A horizon E horizon B horizon and c horizon
the horizon that contains topsoil is the A HORIZON