- On February 23, 1852, the families of Loren and Lucinda Hastings and Francis and Sophia Pettygrove arrive at the site of Port Townsend with another family and several single men. They are the first non-Indian families to settle in the new town that Hastings and Pettygrove, along with Alfred Plummer and Charles Bachelder, are founding on the Olympic Peninsula in what is now Jefferson County.
- Celestial sphere (Wikipedia)
In astronomy and navigation, the celestial sphere is an abstract sphere that has an arbitrarily large radius and is concentric to Earth. All objects in the sky can be conceived as being projected upon the inner surface of the celestial sphere, which may be centered on Earth or the observer. If centered on the observer, half of the sphere would resemble a hemispherical screen over the observing location.