
This is a 16-inch-diameter globe (Weber Costello Executive, 1:31,680,000 scale). You can find data on the physical properties of the earth at this link. Various earth science data and images of the earth are available at this link. There is available an aluminum rod, approximately three feet long, with collars, on which to mount the globe so that you can hold the globe by its axis and rotate it. You can also aim a light at it to illustrate the dependence of the length of daylight time and the seasons on latitude.
Earth is the third planet from the Sun in our solar system. It sits at a distance of about 1.5 × 108 km (93 million miles) from the Sun. This distance is useful as a reference, and it is defined as one astronomical unit (a.u.).
The Earth’s axis of rotation sits at an angle of 23.4° away from perpendicular to the plane of its orbit around the Sun. As a result, there are only two points in Earth’s orbit, when the rotation axis is perpendicular to the line between the Earth and the Sun, where the periods of night and day are equal everywhere on Earth. These are the vernal equinox, which occurs on or about March 21, when it is spring in the northern hemisphere, and the autumnal equinox, which occurs on September 21, when it is fall in the northern hemisphere. At all other times, only points along the equator – the great circle that is perpendicular to the Earth’s axis, midway between the poles – experience equal periods of night and day.
Locations on Earth are specified by coordinates of latitude and longitude. The equator is the zero reference for latitude, which is marked in degrees north and south from it, the north pole being at 90° north latitude, and the south pole at 90° south latitude. The zero reference for longitude is the prime meridian. From 1884 to 1974, this was the longitude line that passed through the Royal Observatory, Greenwich, in London, England. It is now the IERS (International Earth Rotation and Reference Systems Service) Reference Meridian, which sits 102.5 m to the east of the original prime meridian. Longitude is marked in degrees east and west of the prime meridian, up to 180° opposite the prime meridian. The coordinates for Broida Hall are 34°24′50″ (34.4139°) N, 119°50′34″ (119.8428°) W.
References:
1) https://www.rmg.co.uk/stories/time/what-prime-meridian-why-it-greenwich