The year 1611 in

science Science is a systematic endeavor that builds and organizes knowledge in the form of testable explanations and predictions about the universe. Science may be as old as the human species, and some of the earliest archeological evidence for ...

and

technology Technology is the application of knowledge to reach practical goals in a specifiable and reproducible way. The word ''technology'' may also mean the product of such an endeavor. The use of technology is widely prevalent in medicine, science, ...

involved some significant events.

Astronomy

* February 27 –

Sunspots Sunspots are phenomena on the Sun's photosphere that appear as temporary spots that are darker than the surrounding areas. They are regions of reduced surface temperature caused by concentrations of magnetic flux that inhibit convection. ...

are observed by

telescope A telescope is a device used to observe distant objects by their emission, absorption, or reflection of electromagnetic radiation. Originally meaning only an optical instrument using lenses, curved mirrors, or a combination of both to observe ...

by Frisian astronomers Johannes Fabricius and

David Fabricius David Fabricius (9 March 1564 – 7 May 1617) was a German pastor who made two major discoveries in the early days of telescopic astronomy, jointly with his eldest son, Johannes Fabricius (1587–1615). David Fabricius (Latinization of his proper n ...

and Johannes publishes the results of these observations in ''De Maculis in Sole observatis'' in

Wittenberg Wittenberg ( , ; Low Saxon language, Low Saxon: ''Wittenbarg''; meaning ''White Mountain''; officially Lutherstadt Wittenberg (''Luther City Wittenberg'')), is the fourth largest town in Saxony-Anhalt, Germany. Wittenberg is situated on the Ri ...

later this year. Such early discoveries are overlooked however, and the first sighting is claimed a few months later by

Galileo Galilei Galileo di Vincenzo Bonaiuti de' Galilei (15 February 1564 – 8 January 1642) was an Italian astronomer, physicist and engineer, sometimes described as a polymath. Commonly referred to as Galileo, his name was pronounced (, ). He was ...

and Christoph Scheiner.

Mathematics

Johannes Kepler Johannes Kepler (; ; 27 December 1571 – 15 November 1630) was a German astronomer, mathematician, astrologer, natural philosopher and writer on music. He is a key figure in the 17th-century Scientific Revolution, best known for his laws ...

produces Kepler's conjecture on

sphere packing In geometry, a sphere packing is an arrangement of non-overlapping spheres within a containing space. The spheres considered are usually all of identical size, and the space is usually three-dimensional Euclidean space. However, sphere packing p ...

."On the six-cornered snowflake".

Technology

* Completion of Cordouan lighthouse on the

Gironde estuary The Gironde estuary ( , US usually ; french: estuaire de la Gironde, ; oc, estuari de aGironda, ) is a navigable estuary (though often referred to as a river) in southwest France and is formed from the meeting of the rivers Dordogne and Gar ...

(designed by

Louis de Foix Louis may refer to: * Louis (coin) * Louis (given name), origin and several individuals with this name * Louis (surname) * Louis (singer), Serbian singer * HMS ''Louis'', two ships of the Royal Navy See also Derived or associated terms * Lewis (d ...

), the first wave-swept light.

Births

* January 28 – Johannes Hevelius, German astronomer (died

1687 Events January–March * January 3 – With the end of latest of the Savoyard–Waldensian wars in the Duchy of Savoy between the Savoyard government and Protestant Italians known as the Waldensians, Victor Amadeus III of Sardi ...

) * March 1 – John Pell, English mathematician (died

1685 Events January–March * January 6 – American-born British citizen Elihu Yale, for whom Yale University in the U.S. is named, completes his term as the first leader of the Madras Presidency in India, administering the colony ...

) * Willem Piso, Dutch physician and naturalist (died

1678 Events January–March * January 10 – England and the Dutch Republic sign a mutual defense treaty in order to fight against France. * January 27 – The first fire engine company (in what will become the United States) goe ...

) *

Georg Marcgrave Georg Marcgrave (originally german: Georg Marggraf, also spelled ''"Marcgraf" " Markgraf"'') (1610 – 1644) was a German naturalist and astronomer, whose posthumously published ''Historia Naturalis Brasiliae'' was a major contribution to early mo ...

, German naturalist, explorer of Brazil (died

1644 It is one of eight years (CE) to contain each Roman numeral once (1000(M)+500(D)+100(C)+(-10(X)+50(L))+(-1(I)+5(V)) = 1644). Events January–March * January 22 – The Royalist Oxford Parliament is first assembled by King ...

)

Deaths

* August 9 –

John Blagrave John Blagrave of Reading (d. 1611) was an English Tudor mathematician, astronomer and designer of astronomical and mathematical instruments. His astrolabe designs, which he described in his writings, were advanced for Britain. He devoted himself ...

English English usually refers to: * English language * English people English may also refer to: Peoples, culture, and language * ''English'', an adjective for something of, from, or related to England ** English national ide ...

mathematician A mathematician is someone who uses an extensive knowledge of mathematics in their work, typically to solve mathematical problems. Mathematicians are concerned with numbers, data, quantity, structure, space, models, and change. History On ...

(born c.1561) *

Henry Hudson Henry Hudson ( 1565 – disappeared 23 June 1611) was an English sea explorer and navigator during the early 17th century, best known for his explorations of present-day Canada and parts of the northeastern United States. In 1607 and 160 ...

, English explorer (born c.1565)

References

{{reflist 17th century in science 1610s in science