In ancient times, Earth's spin axis was oriented differently, resulting in Vega serving as the North Star. While Polaris isn't the most luminous star in the sky, it is easily identifiable due to its nearly perfect alignment with two stars within the Big Dipper's cup.
Positioned near the center of this eight-degree wide image, Polaris is captured in a digital composite created from hundreds of exposures. This technique reveals the faint gas and dust of the Integrated Flux Nebula (IFN) throughout the frame, as well as the globular star cluster NGC 188 on the far left.
The surface of the Cepheid variable star Polaris undergoes gentle pulsations, causing the well-known star to alter its brightness by a few percent over a period of several days.
Image Credit & Copyright: Javier Zayaz
You Might Also Like :
0 commenti:
Post a Comment