kssp Supercomputer Simul... 投稿者：Charlesteutend 投稿日：2024/06/28(Fri) 05:55 No.18122668 
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NGC 3021 lies about 100 million light-years away in the constellation of Leo Minor. Credit: NASA amp ESA Acknowledgement: A. Riess (STScI)This newly released Hubble image shows the spiral galaxy NGC 3021, which lies about 100 million light-years away in the constellation of Leo Minor.Among many other types of stars, this galaxy contains Ce [url=https://www.stanleycups.es]stanley tumbler[/url] pheid variable stars, which can be used to work out the distance to the galaxy. These stars pulsate at a rate that is closely related to their intrinsic brightness, so measurements of their rate of pulsation and their observed b [url=https://www.nike-dunk.es]nike sb dunk[/url] rig [url=https://www.inkwiz.se]ugg hausschuhe[/url] htness give astronomers enough information to calculate the distance to the galaxy itself.Cepheids are also used to calibrate an even brighter distance marker, that can be used over greater distances: Type Ia supernovae. One of these bright exploding stars was observed in NGC 3021, back in 1995. In addition, the supernova in NGC 3021 was also used to refine the measurement of what is known as the Hubble constant. The val Wvte Polarized Photovoltaic Properties Emerge in 2D Materials ?May Be Superior to Current Solar Cells
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