Fomalhaut is the brightest star in the constellation Piscis Austrinus and lies 25 light-years away.
In November 2008, Hubble astronomers announced the exoplanet, named Fomalhaut b, as the first one ever directly imaged in visible light around another star. The object was imaged just inside a vast ring of debris surrounding but offset from the host star. The planet's location and mass — about three times Jupiter's — seemed just right for its gravity to explain the ring's appearance.
Recent studies have claimed that this planetary interpretation is incorrect. Based on the object's apparent motion and the lack of an infrared detection by NASA's Spitzer Space Telescope, they argue that the object is a short-lived dust cloud unrelated to any planet.
A new analysis, however, brings the planet conclusion back to life.
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Neptune's gravitational imprint on the dust is always detectable in new simulations of how this dust moves through the solar system. By ramping up the collision rate, the simulations show how the distant view of the solar system might have changed over its history. More here. || ", "release_date": "2010-09-23T09:00:00-04:00", "update_date": "2023-05-03T13:54:03.704440-04:00", "main_image": { "id": 490596, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010600/a010635/Kuiper.jpg", "filename": "Kuiper.jpg", "media_type": "Image", "alt_text": "Short video about the Kuiper Belt and the new supercomputer model of its evolution.For complete transcript, click here.", "width": 1280, "height": 720, "pixels": 921600 } }, { "id": 10263, "url": "https://svs.gsfc.nasa.gov/10263/", "page_type": "Produced Video", "title": "Resonant Dust Ring Sculpted by a Super-Earth", "description": "A planet twice the mass of Earth shepherds dust near its orbit into a circumstellar ring structure. Both the planet and the dust structure orbit the host star with a period of 5.2 years. Two regions of enhanced dust density lead and trail the planet, which causes periodic localized brightening. This simulation was computed using NASA GSFC's 420-processor Thunderhead cluster. Stark used the cluster to create a catalog of debris-disk structures caused by Earth-like planets. The catalog is available at http://asd.gsfc.nasa.gov/Christopher.Stark/catalog.php || ", "release_date": "2008-10-07T11:00:00-04:00", "update_date": "2023-05-03T13:55:03.524654-04:00", "main_image": { "id": 501622, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010200/a010263/Resonant_dust_ring_00100002_print.jpg", "filename": "Resonant_dust_ring_00100002_print.jpg", "media_type": "Image", "alt_text": "This view shows the planet and ring structure from 30 degrees above the planet's orbital plane.", "width": 1024, "height": 576, "pixels": 589824 } } ], "sources": [], "products": [], "newer_versions": [], "older_versions": [], "alternate_versions": [] }