What does this number measure?
The approximate width of Earth's annual path. The represented diameter is about two astronomical units. The actual orbit is an ellipse; the diagram simplifies its geometry and does not represent the Sun's size at this scale.
Compare the stated dimensions
The comparison uses the number in each fact sheet: altitude, height, diameter, length or distance, depending on the reference. Two values in metres do not necessarily describe the same property.
Source and limitations
Catalogue order of magnitude; a source is provided, but this measurement has not been individually audited.
Earth's orbit: diagram of the orbital path's diameter along the horizontal axis; the Sun and Earth are enlarged and the orbit is simplified.