NASAのインスタグラム(nasagoddard) - 9月9日 06時02分

In this @nasahubble image, the majestic spiral arms of the spiral galaxy NGC 5559 are alight with new stars being born. NGC 5559's spiral arms are filled with gas and dust sweeping out around the bright galactic bulge. These arms are a rich environment for star formation, dotted with a festive array of colors including the newborn stars glowing blue as a result of their immensely high temperatures.

NGC 5559 was discovered by astronomer William Herschel in 1785 and lies approximately 240 million light-years away in the northern constellation of Boötes (the herdsman). In 2001, a calcium-rich supernova called 2001co was observed in NGC 5559. Calcium-rich supernovae are described as “fast-and-faint,” as they're less luminous than other types of supernovae and also evolve more rapidly, to reveal spectra dominated by strong calcium lines. 2001co occurred within the disk of NGC 5559 near star-forming regions, but calcium-rich supernovae are often observed at large distances from the nearest galaxy, raising curious questions about their progenitors.

Credit: ESA/Hubble and NASA
#space #astronomy #supernova #galaxy #stars #science #nasa #hubble

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