Datoteka:NGC3972 - HST- Potw1810a.jpg
Veličina ovog prikaza: 799 × 599 piksela. Ostale razlučivosti: 320 × 240 piksela | 640 × 480 piksela | 1.024 × 768 piksela | 1.280 × 960 piksela | 2.560 × 1.920 piksela | 4.853 × 3.640 piksela.
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Datum/Vrijeme | Minijatura | Dimenzije | Suradnik | Komentar | |
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sadašnja | 08:29, 5. ožujka 2018. | 4.853 × 3.640 (4,54 MB) | Fabian RRRR | =={{int:filedesc}}== {{Information |description={{en|1='''Galaxy full of cosmic lighthouses This enchanting spiral galaxy can be found in the constellation of Ursa Major (the Great Bear). Star-studded NGC 3972 lies about 65 million light-years away from the Earth, meaning that the light that we see now left it 65 million years ago, just when the dinosaurs became extinct. NGC 3972 has had its fair share of dramatic events. In 2011 astronomers observed the explosion of a type Ia supernova in the galaxy (not visible in this image). These dazzling objects all peak at the same brightness, and are brilliant enough to be seen over large distances. NGC 3972 also contains many pulsating stars called Cepheid variables. These stars change their brightness at a rate matched closely to their intrinsic luminosity, making them ideal cosmic lighthouses for measuring accurate distances to relatively nearby galaxies. Astronomers search for Cepheid variables in nearby galaxies which also contain a... |
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