The year 1609 in

science Science is a systematic discipline that builds and organises knowledge in the form of testable hypotheses and predictions about the universe. Modern science is typically divided into twoor threemajor branches: the natural sciences, which stu ...

and

technology Technology is the application of Conceptual model, conceptual knowledge to achieve practical goals, especially in a reproducible way. The word ''technology'' can also mean the products resulting from such efforts, including both tangible too ...

involved some significant events.

Astronomy

* July 26 – English scientist

Thomas Harriot Thomas Harriot (; – 2 July 1621), also spelled Harriott, Hariot or Heriot, was an English astronomer, mathematician, ethnographer and translator to whom the theory of refraction is attributed. Thomas Harriot was also recognized for his con ...

becomes the first to draw an astronomical object after viewing it through a

telescope A telescope is a device used to observe distant objects by their emission, Absorption (electromagnetic radiation), absorption, or Reflection (physics), reflection of electromagnetic radiation. Originally, it was an optical instrument using len ...

: he draws a map of the

Moon The Moon is Earth's only natural satellite. It Orbit of the Moon, orbits around Earth at Lunar distance, an average distance of (; about 30 times Earth diameter, Earth's diameter). The Moon rotation, rotates, with a rotation period (lunar ...

, preceding

Galileo Galileo di Vincenzo Bonaiuti de' Galilei (15 February 1564 – 8 January 1642), commonly referred to as Galileo Galilei ( , , ) or mononymously as Galileo, was an Italian astronomer, physicist and engineer, sometimes described as a poly ...

by several months. *

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

publishes '' Astronomia nova'', containing his first two laws of planetary motion.

Biology

* Charles Butler publishes ''The Feminine Monarchie, or, A Treatise Concerning Bees''.

Exploration

* April 4 –

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 16 ...

sets out from

Amsterdam Amsterdam ( , ; ; ) is the capital of the Netherlands, capital and Municipalities of the Netherlands, largest city of the Kingdom of the Netherlands. It has a population of 933,680 in June 2024 within the city proper, 1,457,018 in the City Re ...

in the ''

Halve Maen ''Halve Maen'' (; ) was a Dutch East India Company ''jacht'' (similar to a carrack) that sailed into what is now New York Harbor in September 1609. She had a length of 21 metres and was commissioned by the VOC Chamber of Amsterdam in the Dutch ...

''. ** August 28 – Hudson finds

Delaware Bay Delaware Bay is the estuary outlet of the Delaware River on the northeast seaboard of the United States, lying between the states of Delaware and New Jersey. It is approximately in area, the bay's freshwater mixes for many miles with the saltw ...

. ** September 11–12 – Hudson sails into

Upper New York Bay New York Harbor is a bay that covers all of the Upper Bay. It is at the mouth of the Hudson River near the East River tidal estuary on the East Coast of the United States. New York Harbor is generally synonymous with Upper New York Bay ...

and begins a journey up the

Hudson River The Hudson River, historically the North River, is a river that flows from north to south largely through eastern New York (state), New York state. It originates in the Adirondack Mountains at Henderson Lake (New York), Henderson Lake in the ...

Medicine

Louise Bourgeois Boursier Louise (Bourgeois) Boursier (1563–1636) was royal midwife at the court of King Henry IV of France and the first female writer in that country to publish a medical text. Largely self-taught, she delivered babies for and offered obstetrical an ...

publishes ''Diverse Observations on Sterility; Loss of the Ovum after Fecundation, Fecundity and Childbirth; Diseases of Women and of Newborn Infants'' in

Paris Paris () is the Capital city, capital and List of communes in France with over 20,000 inhabitants, largest city of France. With an estimated population of 2,048,472 residents in January 2025 in an area of more than , Paris is the List of ci ...

, the first book on

obstetrics Obstetrics is the field of study concentrated on pregnancy, childbirth and the postpartum period. As a medical specialty, obstetrics is combined with gynecology under the discipline known as obstetrics and gynecology (OB/GYN), which is a su ...

written by a woman. * Jacques Guillemeau publishes ''De l'heureux accouchement des femmes'' in which he describes a method of assisted breech delivery.

Technology

Cornelius Drebbel Cornelis Jacobszoon Drebbel (; 1572 – 7 November 1633) was a Dutch engineer and inventor. He was the builder of the first operational submarine in 1620 and an innovator who contributed to the development of measurement and control systems, opti ...

invents the

thermostat A thermostat is a regulating device component which senses the temperature of a physical system and performs actions so that the system's temperature is maintained near a desired setpoint. Thermostats are used in any device or system tha ...

Births

* June 29 – Pierre Paul Riquet, French engineer and canal builder (died 1680) * October 8 – John Clarke, English physician (died

1676 Events January–March * January 29 – Feodor III of Russia, Feodor III becomes Tsar of Russia. * January 31 – Universidad de San Carlos de Guatemala, the oldest institution of higher education in Central America, is f ...

)

Deaths

* March 26 –

John Dee John Dee (13 July 1527 – 1608 or 1609) was an English mathematician, astronomer, teacher, astrologer, occultist, and alchemist. He was the court astronomer for, and advisor to, Elizabeth I, and spent much of his time on alchemy, divination, ...

, English

alchemist Alchemy (from the Arabic word , ) is an ancient branch of natural philosophy, a philosophical and protoscientific tradition that was historically practised in China, India, the Muslim world, and Europe. In its Western form, alchemy is first ...

astrologer Astrology is a range of Divination, divinatory practices, recognized as pseudoscientific since the 18th century, that propose that information about human affairs and terrestrial events may be discerned by studying the apparent positions ...

and

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, mathematical structure, structure, space, Mathematica ...

(born

1527 Year 1527 ( MDXXVII) was a common year starting on Tuesday of the Julian calendar. Events January–March *January 1 – Croatian nobles elect Ferdinand I of Austria as King of Croatia in the Parliament on Cetin. * January 5 &n ...

) * April 4 –

Carolus Clusius Charles de l'Écluse, L'Escluse, or Carolus Clusius (19 February 1526 – 4 April 1609), seigneur de Watènes, was an Artois doctor and pioneering botanist, perhaps the most influential of all 16th-century scientific horticulturists. Life C ...

Flemish Flemish may refer to: * Flemish, adjective for Flanders, Belgium * Flemish region, one of the three regions of Belgium *Flemish Community, one of the three constitutionally defined language communities of Belgium * Flemish dialects, a Dutch dialec ...

botanist Botany, also called plant science, is the branch of natural science and biology studying plants, especially Plant anatomy, their anatomy, Plant taxonomy, taxonomy, and Plant ecology, ecology. A botanist or plant scientist is a scientist who s ...

(born

1525 Year 1525 ( MDXXV) was a common year starting on Sunday of the Julian calendar. Events January–March * January 21 – The Anabaptist Movement is born when Conrad Grebel, Felix Manz, George Blaurock, and about a dozen others ...

) * August 4 –

Joseph Duchesne Joseph Duchesne or du Chesne (Quercetan, Latin Josephus Quercetanus) ( 1544, Lectoure – 1609) was a French physician. A follower of Paracelsus, he is now remembered for important if transitional alchemical theories. He called sugar toxic, saying: ...

, French physician and alchemist (born c.

1544 __NOTOC__ Events January–March * January 4 – In India, Maldeo Rathore, King of Marwar (now part of the state of Rajasthan) is tricked by counterintelligence spread by Mughal Empire, Mughal Emperor and Afghan Shah Sher Shah Su ...

). * August 16 – André du Laurens, French physician and

gerontologist Gerontology ( ) is the study of the social, cultural, psychological, cognitive, and biological aspects of aging. The word was coined by Ilya Ilyich Mechnikov in 1903, from the Greek ('), meaning "old man", and ('), meaning "study of". The fi ...

(born

1558 __NOTOC__ Year 1558 ( MDLVIII) was a common year starting on Saturday of the Julian calendar. Events January–March * January 7 – French troops, led by Francis, Duke of Guise, take Calais, the last continental possession o ...

). * December – Oswald Croll,

German German(s) may refer to: * Germany, the country of the Germans and German things **Germania (Roman era) * Germans, citizens of Germany, people of German ancestry, or native speakers of the German language ** For citizenship in Germany, see also Ge ...

iatrochemist (born c.

1563 Year 1563 ( MDLXIII) was a common year starting on Friday of the Julian calendar. Events January–March * January 2 (January 2, 1562 O.S., January 11, 1563 N.S.) – The convocation of bishops and clerics of the Church of Engla ...

)

References

{{Reflist 17th century in science 1600s in science