Is a giant planet orbiting Tabby’s Star? Maybe

Astronomers in the U. K. and France said this month they might have found a giant planet orbiting Tabby's Star. It might explain the star's unusual dimming. The post Is a giant planet orbiting Tabby’s Star? Maybe first appeared on EarthSky. The science-journalism coverage adds useful context, while the strongest evidential footing still comes from the underlying data, papers or institutional documentation.

The significance lies in Earth science becomes stronger when local observations can be placed inside a broader physical pattern that spans time and geography. The planet operates as a coupled system in which atmospheric, oceanic, cryospheric and solid-Earth processes interact across timescales from days to millions of years. A measurement that captures one variable at one location and one moment has limited interpretive value until it is embedded in the longer series and wider spatial coverage that allow natural variability to be separated from forced change. A not-yet- peer-reviewed paper about the possible companion has been published as a preprint on arXiv. Doi. org/hccw2x, Science X / Phys. org (@sciencex. bsky. social) 2026-07-28T10: 00: 38-04: 00 What TESS and other data revealed The researchers analyzed data from NASA’s.

New, additional analysis was also conducted on the SOPHIE spectrograph data from the Observatoire de Haute-Provence. Launched in 2018, and now in an “extended” mission, TESS explicitly seeks exoplanets orbiting bright stars relatively close to Earth.

It has identified thousands of candidate exoplanets and hundreds of confirmed worlds, ranging from small, rocky Earth-sized planets to gas giants and super-Earths. Tabby’s Star (officially named Boyajian’s Star or KIC 8462852) is located approximately 1, 470 light-years from Earth, in the direction of the constellation Cygnus the Swan.

It’s too dim to see with the eye (approximately 11th magnitude), but a modest-sized telescope can pick it up. Jupiter is the largest planet in our solar system, with about 2.5 times the mass of all the other planets in our sun’s family combined.

The broader interest lies in linking the observation to climatic, geophysical or environmental dynamics that extend well beyond the immediate event or location. Earth science is unusual in that its most important questions operate on timescales that no single research career can observe directly, making the archival record, whether in ice, sediment, rock or satellite data, as important as any new measurement. Results that can be embedded in that record, and that either confirm or challenge the patterns it reveals, carry disproportionate scientific weight.

Plus, its orbit would be slightly eccentric (oval) with an average distance of 2.35 AU (astronomical unit) from the star. One AU = Earth’s distance from the sun.

Because this item comes through EarthSky as science journalism, it should be treated as contextual reporting rather than primary evidence. Good science reporting can identify why a result matters, connect it to the wider literature and make technical work readable, but the decisive evidence remains in the original paper, dataset, mission release or technical record. That distinction is especially important when a story is later repeated by aggregators, because repetition increases visibility, not evidential strength.

The next step is to place the result inside longer time series and to compare it with independent instruments and independent sites. Earth system observations gain most of their interpretive power from network density and temporal depth, not from any single measurement however precise. Model simulations that assimilate the new data will help clarify whether the observation fits comfortably within known natural variability or represents a shift that existing models do not reproduce.

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