Looking at an alien sky

New Horizons probe sees shifted star positions (photos) Images of the star Proxima Centauri captured by NASA’s New Horizons spacecraft (left) and a ground-based telescope (right). Use a stereo viewer for these photos; if you don’t have a viewer, change your focus from the image by looking “through” it (and the screen) and into the distance. This creates the effect of a third image in the middle; try setting your focus on that third image. NASA's pioneering New Horizons spacecraft has traveled so far that its view of the cosmos is noticeably different than ours. 
The first time that changes in the perspective of stars have been observed from two different positions in space (6.9 billion km distant from each other) (this method is called stellar parallax and is normally performed using two positions of Earth in its orbit around the sun whose maximum distance between one position and another is 300 million km, in this case the distance between the telescope on Earth and the probe was used for the first time is 6900 million km.
Explanation:

Stellar parallax is calculated by observing the apparent motion of a nearby star against the background of more distant stars as Earth rotates around the Sun, known as stellar parallax. ... The closest star is Proxima Centauri, which exhibits a parallax of 0.762 arcseconds.
The news:
New Horizons, which flew by Pluto in 2015 and the even more distant object Arrokoth last year, recently photographed the nearby stars Proxima Centauri and Wolf 359. In a spacecraft first, the imagery shows the two stars occupying slightly different patches of sky than they do from our perspective here on Earth. "It's fair to say that New Horizons is looking at an alien sky, unlike what we see from Earth," New Horizons principal investigator Alan Stern, of the Southwest Research Institute (SwRI) in Boulder, Colorado, said in a statement. "And that has allowed us to do something that had never been accomplished before — to see the nearest stars visibly displaced on the sky from the positions we see them on Earth." This two-frame animation blinks back and forth between New Horizons and Earth images of the star Proxima Centauri, clearly illustrating the different view of the sky New Horizons has from its deep-space perch. (Image credit: NASA/Johns Hopkins Applied Physics Laboratory/Southwest Research Institute/Las Cumbres Observatory/Siding Spring Observatory) New Horizons captured the imagery on April 22 and April 23, when the probe was more than 4.3 billion miles (6.9 billion kilometers) from its home planet. That's so far away that it took 6.5 hours for the data containing the photos, moving at the speed of light, to travel from New Horizons to mission scientists' inboxes. (New Horizons isn't the farthest-flung spacecraft, however. For instance, NASA's Voyager 1 and Voyager 2 probes are both exploring interstellar space, more than 11 billion miles from home.) Proxima Centauri and Wolf 359 are much more distant still, of course. Though Proxima Centauri is the sun's nearest neighbor, the red dwarf star is still 4.2 light-years — about 25 trillion miles (40 trillion km) — from Earth. Wolf 359 lies about 7.9 light-years from us. New Horizons team members compared the probe's photos to imagery of Proxima Centauri and Wolf 359 captured by two ground-based telescopes — one at Siding Spring Observatory in Australia and another at Mt. Lemmon Observatory in Arizona. This two-frame animation blinks back and forth between New Horizons and Earth images of the star Wolf 359, clearly illustrating the different view of the sky New Horizons has from its deep-space perch. (Image credit: NASA/Johns Hopkins Applied Physics Laboratory/Southwest Research Institute/University of Louisville/Harvard and Smithsonian Center for Astrophysics/Mt. Lemmon Observatory) Both Proxima Centauri and Wolf 359 appear to jump when the two photo sets are overlaid, showcasing the "parallax effect." (You can witness this effect firsthand, by the way: Hold your index finger up at arm's length, then blink each eye successively as you stare at it.) "The professional and amateur astronomy communities had been waiting to try this, and were very excited to make a little space exploration history," New Horizons science team member Tod Lauer, of the National Science Foundation's National Optical-Infrared Astronomy Research Laboratory, said in the same statement. "The images collected on Earth when New Horizons was observing Proxima Centauri and Wolf 359 really exceeded my expectations." Lauer coordinated the parallax demonstration and created the new double-barreled imagery, which includes 3D views of the stars from the different perspectives. In this latter effort he had help from New Horizons deputy project scientist John Spencer of SwRI and science team collaborator Brian May, an astrophysicist who also happens to play guitar for the band Queen.