Data and algorithms
秒差距
Parsec
Distance at one arcsecond parallax, 3.26 light-years.
The Milky Way spans about 30,000 parsecs.
Related terms
- Astronomical unit — Earth–Sun mean distance, 149.6 million km.
- Declination — The celestial equivalent of latitude.
- Right ascension — The celestial equivalent of longitude, in hours.
- Epoch — The reference time for coordinates or elements.