The Sun's Oldest Twin Detected
Astronomers working with ESO's very large telescopes in Brazil have discovered the oldest twin of the sun. Located 250 million light-years away, HIP 102152 is the star most similar to the sun, but it is 4 billion years older. Astronomers have only been studying the sun for 400 years, a tiny fraction of the sun's 4.6 billion-year lifetime. In such a short time, our sun […]