Halley is a lunar

impact crater An impact crater is a depression (geology), depression in the surface of a solid astronomical body formed by the hypervelocity impact event, impact of a smaller object. In contrast to volcanic craters, which result from explosion or internal c ...

that is intruding into the southern wall of the walled plain

Hipparchus Hipparchus (; , ; BC) was a Ancient Greek astronomy, Greek astronomer, geographer, and mathematician. He is considered the founder of trigonometry, but is most famous for his incidental discovery of the precession of the equinoxes. Hippar ...

. Its diameter is 35 km. The crater is named after the English astronomer

Edmond Halley Edmond (or Edmund) Halley (; – ) was an English astronomer, mathematician and physicist. He was the second Astronomer Royal in Britain, succeeding John Flamsteed in 1720. From an observatory he constructed on Saint Helena in 1676–77, Hal ...

. On the 1645 map by Michael van Langren, the crater is called ''Gansii'', for the ''gansa'' (a kind of wild swan) of

Francis Godwin Francis Godwin (1562–1633) was an English historian, science fiction author and priest, who was Bishop of Llandaff and of Hereford. Life He was the son of Thomas Godwin, Bishop of Bath and Wells, born at Hannington, Northamptonshire. He wa ...

s ''

The Man in the Moone ''The Man in the Moone'' is a book by the English Divine (noun), divine and Church of England bishop Francis Godwin (1562–1633), describing a "voyage of utopian discovery". Long considered to be one of his early works, it is now generally tho ...

''. To the southwest of Halley is the large crater Albategnius, and due east lies the slightly smaller

Hind A hind is a female deer, especially a red deer. Places * Hind (Sasanian province) (262-484) * Al-Hind, a Persian and Arabic name for the Indian subcontinent * Islamic State – Hind Province, claimed province of the IS in India * Hind (cra ...

. The rim of Halley is somewhat worn, the east being scoured by debris from the Imbrium basin, hence forming part of the Imbrium Sculpture. The interior floor of Halley is relatively flat, being filled with material of the same albedo of the surrounding terrain, and is probably melt from the Imbrium impact.

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 Halley.

References

External links

Halley at The Moon Wiki

LTO-77C2 Halley
— L&PI

topographic map In modern mapping, a topographic map or topographic sheet is a type of map characterized by large- scale detail and quantitative representation of relief features, usually using contour lines (connecting points of equal elevation), but histori ...

* {{cite web, last = Wood , first = Chuck , date = May 27, 2007 , url = http://www.lpod.org/?m=20070527 , title = Drawings , publisher = Lunar Photo of the Day , url-status=dead, archive-url=https://web.archive.org/web/20110614233616/http://www.lpod.org/?m=20070527, archive-date=June 14, 2011 Impact craters on the Moon

Satellite craters

References

Further reading

External links

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