„Dead Zones of the Universe“ –A Challenge to the Search for Extraterrestrial Life
While the Kepler Space Telescope has discovered more than 3,000 exoplanets with 709 confirmed that revolve around a star, new findings from diverse fields are being brought to bear of the central questions of the 21st century: How common is life in the universe? Where can it survive, Will it leave a fossil record? How complex is it? The list below moves several key features of the Universe off the chart of likely places to search for life.
Kepler has discovered exoplanets in alien star systems in an area that represents around 1/400th of the Milky Way. By extrapolating the numbers, the Kepler team has estimated that there are at least 50 billion exoplanets in our galaxy — 500 million of which sit inside the habitable „Goldilocks“ zones of their suns, the area that is neither too hot nor too cold to support life.
Astronomers estimate that there are 100 billion galaxies in the Universe. If you want to extrapolate those numbers, that means there are around 50,000,000,000,000,000,000 (50 quintillion) potentially habitable planets in the universe.
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