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altitude
The device that astronomers use to find the angle between the horizon and stars in the sky is called a sextant.
Sextant is used to measure the angle between any two visible objects.Its primary use is to determine the angle between a celestial object and the the horizon which is also know as objects altitude.
If the reference point and an object are both on the horizon then the angular distance to the object, relative to the reference point is simply the angle formed between the two rays from the observer to object and to the reference point. If either the object or reference point (or both) are not in the plane of the horizon then the appropriate rays are the projections of the rays from the observer onto the plane containing the horizon.
In a first angle projection, the object stands in between the observer and the plane of projection. In a third angle project, the object and the plane of projection is interchanged.
altitude
Altitude is the angle measured above the horizon.
the angle between an object in the sky and the horizon
If I understand the question, then it includes a false statement.The angle between an object and the horizon is the object's 'elevation' angle.'Zenith' is a point in the sky . . . the point directly over your head, whoseelevation angle is 90 degrees regardless of which direction you're facing..
The device that astronomers use to find the angle between the horizon and stars in the sky is called a sextant.
A 45 degree sun angle indicates that the sun is halfway between the horizon and directly overhead (known as the zenith). Such an angle causes the length of an object's shadow to be equal to the object's height.
Sextant is used to measure the angle between any two visible objects.Its primary use is to determine the angle between a celestial object and the the horizon which is also know as objects altitude.
If the reference point and an object are both on the horizon then the angular distance to the object, relative to the reference point is simply the angle formed between the two rays from the observer to object and to the reference point. If either the object or reference point (or both) are not in the plane of the horizon then the appropriate rays are the projections of the rays from the observer onto the plane containing the horizon.
Almost . . ."Altitude" is the apparent angle of the object above the horizon.
This angle is termed as Altitude.
the angle of elevation would be the angle between the horizon and the line of sight to whatever object you are measuring to. Lets say for instance that you see a plane, and you determine that it has an angle of elevation of 30 deg. This means that from the horizon, you would need to look up at an angle of 30 degrees to see that plane. below I linked to a diagram which illustrates it quite well. Hope this helped!
Zenith is in a 90 degree angle and Horizon is a left and right direction