The Study of the Universe/Space Exploration – Demo


An astrolabe illustrates how the sky looks at any given time of day and throughout the year. This is accomplished by drawing the sky (star patterns) on the astrolabe with moveable parts to adjust for the date and time. The traditional sky map astrolabe allowed people to locate celestial objects in the sky similar to how a place is located using a map. A mariner’s astrolabe is different in that it was used to measure the height or altitude of the Sun or of a star above the horizon. The altitude of a star is the angular height above the horizontal from 0 to 90°. Mariners needed to measure the altitude of the Sun or stars in the sky in order to determine their position. Knowing the altitude of the Sun at noon or of the pole star at night told them their latitude (their distance, north or south, from the equator.

The azimuth of a star is its angular position from north, measured clockwise. For example a star located directly to the north of Earth has an azimuth of 0°, while a star directly to the east has an azimuth of 90° and a star to the northwest has an azimuth of 315°.

Click here to download the demo…..

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s