At the exact moment you were born, light left Earth traveling at 299,792 kilometers per second. That light has been racing through space ever since. This tool shows you exactly how far your birth-light has traveled, with a live counter ticking upward in real time, and maps it against 20 cosmic waypoints from the Moon to distant galaxies.
Discover which cosmic landmarks your birth-light has already passed and calculate the exact date it will reach each waypoint. See your light's position relative to the nearest stars, nebulae, and galaxies. Explore Cosmic Postcards showing where the birth-light of 20 famous historical figures has traveled — Einstein's birth-light has passed over 3,600 stars.
Built with precise astronomical distance data and Julian Day Number calculations. The live counter updates in real time, showing kilometers traveled since your birth. All calculations happen in your browser — no data is transmitted or stored.