April 28, 2015
Your life began on a planet that never stops moving under a sky that never stops changing.
Massive Nearby Spiral Galaxy NGC 2841
Birthday · April 28, 2015
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APOD published April 28, 2015. Credit: Roberto Colombari. A publication-date match, not a photo taken on your date. Independent of NASA.
It is one of the more massive galaxies known. A mere 46 million light-years distant, spiral galaxy NGC 2841 can be found in the northern constellation of Ursa Major. This sharp view of the gorgeous island universe shows off a striking yellow nucleus and galactic disk. Dust lanes, small, pink star-forming regions, and young blue star clusters are embedded in the patchy, tightly wound spiral arms. In contrast, many other spirals exhibit grand, sweeping arms with large star-forming regions. NGC 2841 has a diameter of over 150,000 light-years, even larger than our own Milky Way and captured by this composite image merging exposures from the orbiting 2.4-meter Hubble Space Telescope and the ground-based 8.2-meter Subaru Telescope. X-ray images suggest that resulting winds and stellar explosions create plumes of hot gas extending into a halo around NGC 2841.
Image credit: Roberto Colombari