This file is from Wikimedia Commons and may be used by other projects.
The description on its file description page there is shown below.
Summary
Comparison of sizes and orbits of the terrestrial planets, from left to right: en:Mercury, en:Venus, en:Earth, and en:Mars.
Yellow segments represent varying distance from the Sun.
DescriptionTerestial planets comparisons.jpg
Comparison of sizes and orbits of the terrestrial planets
The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies. These are not necessarily in the public domain.
The SOHO (ESA & NASA) joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use. [2]
The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies. These are not necessarily in the public domain.
The SOHO (ESA & NASA) joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use. [5]