NASAさんのインスタグラム写真 - (NASAInstagram)「🎶 Baby stars! 🎶 ✨ This galaxy might be bursting with star formation and stellar newborns. ⁣ ⁣ Our @NASAHubble space telescope turned its powerful eye towards galaxy NGC 3749, over 135 million light-years away from Earth. This galaxy shows strong emission lines (signs of emission from elements within a galaxy's spectrum of light), suggesting that it has plenty of star-forming material and energetic new stars. ⁣ ⁣ This study technique, known as spectroscopy, is used by astronomers to understand a galaxy’s type and composition, the density and temperature of any emitting gas, the star formation rate, or how massive the galaxy’s central black hole might be. ⁣ ⁣ Image Credit: ESA/Hubble & NASA, D. Rosario et al.⁣ ⁣ #hubble #galaxy #babies #stars #universe #esa #nasa」11月23日 8時00分