The Benefits of Aging on Earth Versus Space

According to Einstein’s <a href="https://press.princeton.edu/books/paperback/9780691191812/relativity" rel="noopener ugc nofollow" target="_blank">Special Theory of Relativity</a> — time progresses differently for a moving clock, and according to Einstein’s General Theory of Relativity — time advances more slowly for a clock embedded in a gravitational potential. The rate by which we age biologically is affected by both effects. Because of our circular motion under the Sun’s gravity, our average time dilation relative to a distant stationary observer is obtained by summing the contributions of the Sun’s gravitational potential and the transverse <a href="https://hepweb.ucsd.edu/ph110b/110b_notes/node59.html" rel="noopener ugc nofollow" target="_blank">Doppler effect</a>. Their sum <a href="https://arxiv.org/pdf/1303.3663.pdf" rel="noopener ugc nofollow" target="_blank">equals</a> half of the square of the Earth’s circular speed around the Sun in units of the speed of light. The Earth’s speed of 30 kilometers per second is ten thousand times smaller than the speed of light, yielding a net time dilation of 23 years over the age of the solar system, 4.6 billion years. <a href="https://avi-loeb.medium.com/the-benefits-of-aging-on-earth-versus-space-ebaff8bab73d">Website</a>