Blackett is a
lunar impact crater that lies on the
far side of the
Moon, behind the southwest limb. It lies beyond the southeast outer ring of the immense
Mare Orientale basin. The formation of that major feature has left Blackett deeply marked with ridge features trending from the northwest. Much of the crater has been shaped by the
ejecta
Ejecta (from the Latin: "things thrown out", singular ejectum) are particles ejected from an area. In volcanology, in particular, the term refers to particles including pyroclastic materials (tephra) that came out of a volcanic explosion and magma ...
from Mare Orientale, particularly along the western half of the crater.
Overall this crater is heavily eroded, with several craters overlaying the southern rim, and smaller formations overlaying the western and northwestern rim. The interior floor has been roughened by ejecta, leaving only parts of the southwest interior in their previous relatively level and featureless condition.
The crater
Stetson
Stetson is a brand of hat manufactured by the John B. Stetson Company. "Stetson" is also used as a generic trademark to refer to any campaign hat, in particular, in Scouting.
John B. Stetson gained inspiration for his most famous hats when he ...
lies on the southwest rim.
Satellite craters
By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Blackett.
References
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Impact craters on the Moon
{{Craters on the Moon: A–B