Ailsa is a staff writer for How It Works magazine, where she writes science, technology, space, history and environment features. Based in the U.K., she graduated from the University of Stirling with a BA (Hons) journalism degree. Previously, Ailsa has written for Cardiff Times magazine, Psychology Now and numerous science bookazines.
Because Sirius is so bright, it was well-known to the ancients. However the discovery of a companion star, Sirius B, in 1862 surprised astronomers. The star that you can see with the naked eye is called Sirius A, or sometimes just Sirius. . If the star were placed next to our sun, Sirius would outshine it more than 20 times over, according toas a pointer. The belt's three stars point downward toward Sirius to the left.
We asked Michael Shara, a curator in the American Museum of Natural History's Department of Astrophysics, a few frequently asked questions about Sirius. Sirius is 25 times more luminous than our sun and just 8.6 light years distant. This combination of high intrinsic luminosity and closeness explains Sirius' brightness. We see Sirius through our atmosphere, which is turbulent. Tiny differences in the amount of air every fraction of a second between us and Sirius cause the twinkling.
More than 100 years after Halley's finding, in 1844, German astronomer Friedrich Wilhelm Bessel published a scientific note in thedescribing how Sirius had been deviating from its predicted movement in the sky since 1755. Bessel hypothesized that an unseen companion star affected Sirius' motion. Alvan Graham Clark, a U.S. astronomer and telescope maker, confirmed Bessel's hypothesis in 1862 when he spotted Sirius B through Clark's newly developed great refractor telescope.
It wasn't until 2005 when a team of astronomers assembled data collected by the Hubble Space Telescope, that scientists were able to measure the for the first time. They found that the star has a mass that is 98 percent that of Earth's sun.orbiting bright stars. Because Sirius is a young star, it's not likely to have planets orbiting it. TESS discovered 66 new exoplanets, according tohttps://adsabs.harvard.edu/full/1993QJRAS..34..135Hhttps://adsabs.harvard.edu/full/1930PASP...42..
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