This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Bertrand Venus Satellite. en An artist impression of Venus and its satellite Bertrand Le satellite de Venus Astronomie reproduced in Kragh The Moon that Wasn't The Saga of Venus' Spurious Satellite Birkhuser Bertrand Joseph PDold Moons of Venus Artist's impressions of Venus Etchings
Page 2023 Free-images.com. All images are Public Domain