Double Vision: Scientists Spot An Elder ‘Twin’ To the Sun
The life-cycle of a Sun-like star from protostar (left side) to red giant (near the right side) to white dwarf (far right). Credit: ESO/M. Kornmesser
If you want a picture of how you’ll look in 30 years, youngsters are told, look at your parents. The same principle is true of astronomy, where scientists compare similar stars in different age groups to see how they progress.
We have a special interest in learning how the Sun will look in a few billion years because, you know, it’s the main source of energy and life on Earth. Newly discovered HIP 102152 could give us some clues. The star is four billion years older than the sun, but so close in composition that researchers consider it almost like a twin.
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Read the rest of Double Vision: Scientists Spot An Elder ‘Twin’ To the Sun (417 words)
© Elizabeth Howell for Universe Today, 2013. |
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Post tags: alien planets, European Southern Observatory, exoplanets, HIP 102152, lithium, telescope, Very Large Telescope
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Source: http://www.universetoday.com/104389/double-vision-scientists-spot-an-elder-twin-to-the-sun/
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