Astronomers reject the idea of Nibiru, and have made efforts to inform the public that there is no threat to Earth. They point out that such an object so close to Earth would be easily visible to the naked eye, and would create noticeable effects in the orbits of the outer planets. Most photographs purporting to show "Nibiru" beside the Sun are lens flares, false images of the Sun created by reflections within the lens. Claims that the object has been concealed behind the Sun are untenable.