Une galaxie de nébuleuses
Peut-on voir des nébuleuses dans d'autres galaxies ? Oui, certaines nébuleuses brillent suffisamment pour être visibles, à condition de savoir comment les observer.
Clouds of hydrogen and oxygen emit light at very specific colors, and by isolating them, astronomers and astrophotographers can reveal structures that would otherwise be too faint to notice. This deep, 50-hour exposurehighlights glowing hydrogen (red) and oxygen (blue) across galaxy NGC 55, viewed nearly edge-on. Also known as the String of Pearls Galaxy, NGC 55 is often compared to our Milky Way's satellite galaxy the Large Magellanic Cloud (LMC), although NGC 55 lies much farther away at about 6.5 million light-years. The resulting image uncovers a sprinkling of emission nebulas within and sometimes above the galaxy's dusty disk, offering a detailed look at distant star-forming regions.
[Source: Astronomy Picture of the Day - traduit par EDGE news]
