219 Million Stars Create the Most Detailed Catalogue of our Milky Way Yet
A density map of part of the Milky Way’s disk. The axes show galactic latitude and longitude, coordinates that relate to the position of the center of the galaxy. Credit: Hywel Farnhill, University of Hertfordshire.
On the darkest of nights, thousands of stars are sprinkled across the celestial sphere above us. Or, to be exact, there are 9,096 stars observable across the entire sky. Divide that number in half, and there are 4,548 stars (give or take a few) visible from horizon to horizon.
But this number excludes the glowing band stretching across the night sky, the Milky Way. It’s the disk of our own galaxy, a system stretching 100,000 light-years across. The naked eye is unable to distinguish individual specks of light, but the Isaac Newton Telescope (INT) on La Palma in the Canary Islands has recently charted 219 million separate stars in this disk alone.
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© Shannon Hall for Universe Today, 2014. |
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