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- Q945949 description "Dutch astronomer".
- Q945949 description "Dutch astronomer".
- Q945949 subject Q6469804.
- Q945949 subject Q6591848.
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- Q945949 subject Q8393407.
- Q945949 subject Q8474962.
- Q945949 subject Q8732472.
- Q945949 subject Q8883197.
- Q945949 abstract "Johannes Phocylides Holwarda (Jan Fokkesz, Jan Fokker, Johann Holwarda, Johannes Fokkes Holwarda, Jan Fokkens Holwarda, Jan Fokkes van Holwerd) (February 19, 1618—January 22, 1651) was a Frisian astronomer, physician, and philosopher. He was professor of philosophy at the University of Franeker from 1639 to 1651.Born in Holwerd, he is best remembered for his discovery of the period of Mira's (Omicron Ceti's) variation in brightness. In a systematic study in 1638, he found that Mira disappeared and reappeared in a varying cycle of about 330 days.He was a supporter of “atomism”. His Philosophia Naturalis, seu Physica Vetus-Nova, published posthumously in 1651, defines matter and form: matter is extended and divided into atoms while form is the texture of atoms. According to Phocylides, bodies are formed of atoms and void. Atoms, which he distinguished as simple or compound, are solid corpuscles that receive motion directly from God.The lunar crater Phocylides is named after him.".
- Q945949 birthDate "1618".
- Q945949 birthYear "1618".
- Q945949 deathDate "1651".
- Q945949 deathYear "1651".
- Q945949 thumbnail Johannes_Phocylides_Holwarda.jpg?width=300.
- Q945949 wikiPageWikiLink Q106416.
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- Q945949 wikiPageWikiLink Q6469804.
- Q945949 wikiPageWikiLink Q6591848.
- Q945949 wikiPageWikiLink Q6594475.
- Q945949 wikiPageWikiLink Q8393377.
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- Q945949 dateOfBirth "1618".
- Q945949 dateOfDeath "1651".
- Q945949 name "Phocylides Holwarda".
- Q945949 shortDescription "Dutch astronomer".
- Q945949 type Person.
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- Q945949 comment "Johannes Phocylides Holwarda (Jan Fokkesz, Jan Fokker, Johann Holwarda, Johannes Fokkes Holwarda, Jan Fokkens Holwarda, Jan Fokkes van Holwerd) (February 19, 1618—January 22, 1651) was a Frisian astronomer, physician, and philosopher. He was professor of philosophy at the University of Franeker from 1639 to 1651.Born in Holwerd, he is best remembered for his discovery of the period of Mira's (Omicron Ceti's) variation in brightness.".
- Q945949 label "Johannes Phocylides Holwarda".
- Q945949 depiction Johannes_Phocylides_Holwarda.jpg.
- Q945949 name "Phocylides Holwarda".