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During this observation campaign they have succeeded in shooting Polaris features on its surface; large bright places and dark ones have appeared in close-up images, changing over time. Further, Polaris diameter size has been re-measured to 46 R ☉, using the Gaia distance of 446 ± 1 light-years, and its mass was determined at 5.13 M ☉. [10]
In 3000 BC, the faint star Thuban in the constellation Draco was the North Star, aligning within 0.1° distance from the celestial pole, the closest of any of the visible pole stars. [ 7 ] [ 8 ] However, at magnitude 3.67 (fourth magnitude) it is only one-fifth as bright as Polaris, and today it is invisible in light-polluted urban skies.
The following is a list of stars with resolved images, that is, stars whose images have been resolved beyond a point source. Aside from the Sun , observed from Earth , stars are exceedingly small in apparent size, requiring the use of special high-resolution equipment and techniques to image.
Size comparison between the Sun, Beta Ursae Majoris, Pollux, and Arcturus.. Merak / ˈ m ɪər æ k /, also called Beta Ursae Majoris (β Ursae Majoris, abbreviated Beta UMa, β UMa), [9] [10] is a star in the northern constellation of Ursa Major.
NASA’s Hubble Space Telescope recently captured a breathtaking image of the spiral galaxy NGC 2566. ... be around 320 light-years away from the North Star, 26,000 light-years away from the ...
Precession of the equinoxes for the Pole Star. Thuban is toward the right of the image, below the −2000 mark. Due to the precession of Earth's rotational axis, Thuban was the naked-eye star closest to the north pole from 3942 BC, when it superseded Tau Herculis as the pole star, until 1793 BC, when it was superseded by Kappa Draconis.
New images of the sun captured by the Solar Orbiter mission showcase the highest-resolution views of our star’s visible surface ever seen, revealing sunspots and continuously moving charged gas ...
A light curve for Gamma Cassiopeiae, plotted from data published by Labadie-Bartz et al. (2021) [15] Amateur image of γ Cassiopeiae and the associated nebulae IC63 and IC59. The bright star due south of Gamma Cassiopeiae is HD 5408 , a common proper motion companion.