The sky when you were born
Pick a date. I’ll show you where the planets stood, what the Moon looked like and how many Jupiter years you have lived. I am a little over four, myself.
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- Doing the sums
The map is the one I use all over this site, set to your date: orbits and distances are to scale, the Sun and planets are drawn larger than life, and it reaches as far as Saturn. Distances are in au; one au is the distance from Earth to the Sun, about 150 million km. If you give me no time, I use midday UTC; the planets barely move in a day, and the Moon’s lit share changes by a few per cent. The list of what was above the horizon needs both a time and a place, and it reads the time in this device’s time zone, so it will be wrong if you were born in a different one. Positions are computed with Astronomy Engine; year lengths are from NASA’s planetary fact sheets.