## Shop Windows to the Universe

Science, Evolution, and Creationism, by the National Academies, focuses on teaching evolution in today's classrooms. Check out the other publications in our online store.

This cutaway view of the Earth shows the angular measurement of latitude and longitude.
Click on image for full size
Image Courtesy of Dennis Ward/UCAR

# Angles Determine Latitude and Longitude

This cutaway view of the Earth illustrates the angular measurement of latitude and longitude.

Latitude, shown in blue, is the angular distance from the Equator to a point on the Earth's surface. Latitude can either be North or South, depending on the hemisphere in which the location is located. GPS units and digital mapping applications, such as Google Earth, often indicate northern latitudes as being positive (0 to +90 degrees), and give southern latitudes negative values (0 to -90 degrees).

Longitude, shown in red, is the angular distance from the Prime Meridian to a point on the Earth's surface. Longitude is described as being either East or West, depending on which way you measure from the Prime Meriadian, and ranges from 0 degrees at the Prime Meridian, to 180 degrees at the Antimeridian. Digital maps use positive numbers for eastern latitudes (0 to +180 degrees) and negative numbers for western latitudes (0 to -180 degrees).

#### Shop Windows to the Universe Science Store!

Our online store includes books on science education, classroom activities in The Earth Scientist, mineral and fossil specimens, and educational games!

## Latitude and Longitude

The most common way to locate points on the surface of the Earth is by standard, geographic coordinates called latitude and longitude. These coordinates are measured in degrees and represent angular distances...more

## Angles Determine Latitude and Longitude

This cutaway view of the Earth illustrates the angular measurement of latitude and longitude. Latitude, shown in blue, is the angular distance from the Equator to a point on the Earth's surface. Latitude...more

## The Andes Mountains

The Andes Mountains form one of the longest continuous mountain ranges on Earth, extending over 7,000 km (4,400 miles) along the west coast of South America. One of the more surprising aspects of this...more

Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part is sponsored in part through grants from federal agencies (NASA and NOAA), and partnerships with affiliated organizations, including the American Geophysical Union, the Howard Hughes Medical Institute, the Earth System Information Partnership, the American Meteorological Society, the National Center for Science Education, and TERC. The American Geophysical Union and the American Geosciences Institute are Windows to the Universe Founding Partners. NESTA welcomes new Institutional Affiliates in support of our ongoing programs, as well as collaborations on new projects. Contact NESTA for more information.