# Does the azimuth change?

As shown in the animation below, the azimuth angle varies throughout the day. The sun rises straight east and sets directly west at the equinoxes, regardless of latitude, resulting in azimuth angles of 90 degrees at sunrise and 270 degrees at dusk. The azimuth angle is similar to a compass direction, with North = 0 degrees and South = 180 degrees. During the rest of the year, the azimuth angle will vary from East (0 degrees) at solstice to West (90 degrees) at equinox.

In the northern hemisphere, the sun appears to move southward during the summer and northward during the winter. This is because the earth's axis of rotation is not fixed, but instead wobbles like a spinning top. The axis points in different directions at different times of year, so that the area around the equator experiences seasons too: spring in the Northern Hemisphere means the days are getting longer, while winter there means the nights are growing longer. In contrast, the portion of the earth's surface near the poles remains frozen all year round, without benefit of sunlight or shadow.

In the southern hemisphere, the sun appears to move northward during the summer and southward during the winter. Again, this is because the axis points in different directions at different times of year, so that the area around the equator experiences seasons too: fall in the Southern Hemisphere means the days are getting shorter, while summer there means the nights are becoming shorter.

## What does the azimuthal angle mean?

The azimuth angle is the compass direction in which the sunlight is coming from. The sun is always straight south in the northern hemisphere and directly north in the southern hemisphere during solar noon. Sunrise and sunset are both considered positive angles, while moonrise and moonset are both negative angles.

The word "azimuth" comes from Greek and means "direction". In navigation, the term refers to the angle between the east-west axis (the line connecting the center of the earth to the sun) and the north-south axis (the plane of the earth).

Solar panels generate power when exposed to light from the sun. Because the amount of power generated varies over time, engineers use sensors to detect when the sun rises and falls as well as when it is fully up in the sky every day. They then estimate how much power the panel will produce during that hour of daylight. Finally, they adjust the orientation of the panel so that it faces in the estimated direction toward the sun during solar noon.

People have used the appearance of the stars to navigate for thousands of years using nothing but their naked eyes. They did this by observing which stars were visible on the horizon and assuming that they were all at approximately the same elevation above the earth's surface. They would then guess which direction was north based on which way some stars were pointing.

## What is meant by "azimuth angle"?

The azimuth angle is similar to the compass direction, with North = 0 degrees and South = 180 degrees...

During a sunset or sunrise, the sun's rays are coming from all directions relative to Earth's surface. So the azimuth angle ranges from 0 to 360 degrees.

In astronomy, the azimuth angle is the compass point on the celestial sphere corresponding to the current position of the Sun as viewed from Earth. It can be expressed in decimal degrees, minutes, and seconds or simply as degrees east or west of north.

For example, at local midnight on July 25, when the Sun is due north, its azimuth angle is zero degrees. At local noon on August 8, when the Sun is due south, its azimuth angle is 90 degrees.

The term comes from the Greek word for bearing, αἴσχια, which means "opposite angles" when applied to two stars that lie on opposite sides of the celestial equator. Because these stars never rise more than 18 degrees above the eastern horizon and set no more than 18 degrees below the western horizon, they must be on opposite sides of North if we are to keep track of their movements across the sky.

## What is the use of azimuth?

The azimuth is the angle between North and a celestial body, measured clockwise around the observer's horizon (sun, moon). It determines the heavenly body's orientation. The azimuth lines and elevation on the time bar also show the azimuth on the map. Note that on a globe or other curved surface, the azimuth may differ from the direction that appears to be north when viewing the scene directly overhead.

When standing with your back to a mountain, tree, or other object that is clearly visible in the distance, what angle can you see between you and it? This is called the azimuth angle. On a clear day, you can see many miles away, so the angle will be large. But if the object you are looking at is close by, the angle will be small.

On Earth, we know about these angles because they are always showing up on our maps. The azimuth line shows the direction that is due north. If you follow the line past the east coast, it will take you to true north. West of the Azimuth Line is south. And wherever it points now, that was its direction last week, month, year, or longer if it is an old line on a old map.

People have been making maps for thousands of years using whatever tools they could get their hands on.

##### Charline Siegel

Charline Siegel is a spiritual being that loves astrology and mindfulness. She believes in the power of crystals, tarot cards and meditation to help people find their happiness.