Discovering teenage galaxies
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A 92-hour long spectrum. Two-dimensional spectrum obtained in 92 hours of exposure time, showing the line emitter candidates. The quasar absorption lines are visible close to the centre of the image. Credit ESO
Staring for the equivalent of every night for two weeks at the same little patch of sky with ESO’s Very Large Telescope, an international team of astronomers has found the extremely faint light from teenage galaxies billions of light years away. These galaxies, which the research team believes are the building blocks of normal galaxies like our Milky Way, had eluded detection for three decades, despite intensive searches.
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