First interstellar parallax experiment. Two views of the star Wolf 359 (centre). The image at left was taken by the New Horizons spacecraft at a distance of approximately 7 billion kilometres from Earth, the image at right was taken from Mt. Lemmon Observatory, Arizona, USA. This is the first time an image has been able to be taken where it is easy to observe that stars are in a different position to that seen from Earth. The observed shift in position, known as the parallax effect, can be used to measure distance to stars and could be used for interstellar navigation. The New Horizons image was taken by the spacecraft's Long-Range Reconnaissance Imager (LORRI) camera. Both images were obtained on 23rd April 2020.