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Interactive Bradley Observatory Plaza

The Metro-Atlanta Scale Model Solar System (MASS) Project

The Metro-Atlanta Scale Model Solar System (MASS) project is an informal science education tool for the residents of Atlanta, focused on helping people understand the size and scale of our solar system and the planets within it.

The center of the model is located at Bradley Observatory, where the Sun is represented by an approximately 30 foot diameter plaza. At eight other locations throughout Metro-Atlanta (shown below), two large format panels have been installed. One panel shows the extent of the MASS and the location of each of the planets. A second panel shows a scaled image of the planet that would be found at that location in its orbit around the Sun.

Interactive Map of the Bradley Observatory Plaza Design

Click the planets in the design for more information.

Sun

Distance from Earth: 149,597,900 km

Equatorial Radius: 695,500 km

Bradley Observatory, Ïã¸Û°ÄÃÅ×ÊÁÏ´óÈ«

Mercury

Distance from the Sun: 57,909,175 km

Equatorial Radius: 2,439.7 km

Alston Campus Center, Ïã¸Û°ÄÃÅ×ÊÁÏ´óÈ«

Venus

Distance from the Sun: 108,208,930 km

Equatorial Radius: 6,051.8 km

Earth

Distance from the Sun: 149,587,890 km

Equatorial Radius: 6,378.14 km

Mars

Distance from the Sun: 227,936,640 km

Equatorial Radius: 3,397 km

Jupiter

Distance from the Sun: 778,412,020 km

Equatorial Radius: 71,492 km

Saturn

Distance from the Sun: 1,426,725,400 km

Equatorial Radius: 60,268 km

Uranus

Distance from the Sun: 2,870,972,200 km

Equatorial Radius: 25,559 km

Neptune

Distance from the Sun: 4,498,252,900 km

Equatorial Radius: 24,764 km