Science and Astronomy
- The atomic number of copper
- Messier object M29, a magnitude 9.0 open cluster in the constellation Cygnus
- The New General Catalogue object NGC 29, a spiral galaxy in the constellation Andromeda
- The lunar month is very close to twenty-nine days.
- Saturn requires over 29 years to orbit the Sun
- The number of days February has in leap years.
Read more about this topic: 29 (number)
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