@nasa : Hubble reveals the first visual evidence of how our home galaxy assembled itself into the majestic pinwheel of stars we see today. This composite image shows examples of galaxies similar to our Milky Way at various stages of construction over a time span of 11 billion years. The galaxies are arranged according to time. Those on the left reside nearby; those at far right existed when the cosmos was about 2 billion years old. The bluish glow from young stars dominates the color of the galaxies on the right. The galaxies at left are redder from the glow of older stellar populations. This image traces Milky Way-like galaxies over most of cosmic history, revealing how they evolve over time. Hubble's sharp vision resolved the galaxies' shapes, showing that their bulges and disks grew simultaneously. Credit: NASA, ESA, P. van Dokkum (Yale University), S. Patel (Leiden University), and the 3D-HST Team #hubble #space #galaxy #universe #hubblespacetelescope #hst #nasa #esa #star #stars #milkyway
โพสต์เมื่อ 15 พ.ย. 2556 | 03:15 น.
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