Another accusation frequently made by websites predicting the collision is that the U.S. government built the South Pole Telescope (SPT) to track Nibiru's trajectory, and that the object has been imaged optically. However, the SPT (which is not funded by NASA) is a radio telescope, and cannot take optical images. Its South Pole location was chosen due to the low-humidity environment, and there is no way an approaching object could be seen "only" from the South Pole. The "picture" of Nibiru posted on YouTube was revealed, in fact, to be a Hubble image of the expanding light echo around the star V838 Mon.