Eratosthenes 2015
How Big is our World ?
ERATOSTHENES 2015 highlights Special events
Panhellenic congress World Space Week Athens Acropolis Solar Eclipse Halloween
Erat贸stenes Plaza Mayor Bibliotheca Alexandrina Greek Holidays Indian Summer
Astronomical events March & September equinoxes June & December solstices No noon shadow days
104 schools from 25 countries recorded 567 measurements over 5 continents, to calculate the circumference of the Earth
Eratosthenes 2015
Eratosthenes historical experiment In 205 B.C., the Greek astronomer Eratosthenes, at the time Director of the Great Library of Alexandria in Egypt, proposed a purely geometrical method to measure the length of the Earth's circumference
In Syene (Actually Aswan, approximately situated on the tropic of Cancer) the Sun is at the vertical, so much so that its rays reach the bottom of a well: and the shadows of vertical objects are perfectly centred round them.
In Alexandria, on the other hand, the Sun is no longer at the vertical, and these same objects have a very shallow offset shadow. Eratosthenes set about measuring the shadow of an obelisk whose height he knew, and used this information to deduce the angle of the sun's rays from the vertical: he found 7.2째
The proportion of this angle in relation to the 360째 of a circle is the same as the proportion of the distance separating the two cities (approximately 800 km) relative to the circumference of a circle
Eratosthenes 2015
Eratosthenes Greek Team
January
With 26 participating schools, Greece is the most active country this year
Eratosthenes 2015
Project kick off (Asia, Europe, Africa)
February
3 continents, 4 countries, 4 schools, 4 measurements
Collège Perbosc Lafrançaise, FRANCE
SMK St Thomas, Kuantan, MALAYSIA Experimental College Ioannina, GREECE
Ecole de Sakiet Eddayer Sfax TUNISIA
Eratosthenes 2015
Astronomical event : march equinox 5 continents, 19 countries, 47 schools, 130 measurements
March
Instituto Diocesano de Formação João Paulo II São Tomé and Príncipe
Aigio Anisacate Aspropyrgos Athens Băicoi Bjelovar Chiayi City Dendermonde Donji Muć Doreen Drama Trần Khai Nguyên High school Gressoney St Jean Grevena Hô Chi Minh City Hô Chi Minh City VIETNAM Imbassai Ioannina Kanchanpur Kaohsiung Komotini Hazel Glen College Kuantan Doreen, AUSTRALIA Lafrançaise Lardos Mandhar Scola Secundária Palmela PORTUGAL Marina di Carrara Medvode 3o Γυμνάσιο Iλίου, Merlara Mumbai 1st High School of Aigio Nova Bukovica 3rd High School of Aspropirgos, Ogulin Protypo Peiramatiko Gymnasio Agion Anargyron, Palmela In Athens Acropolis, GREECE Patras Petroupoli Plaški Pont St Martin Rio de Janeiro Saint Félix São Tomé Sfax Shenzhen Stuttgart
Eratosthenes 2015
Special event: Solar Eclipse Marina di Carrara ITALY
Ioannina GREECE
Lafranรงaise FRANCE
Lardos GREECE
Medvode SLOVENIA
St Felix FRANCE
Lafranรงaise FRANCE
Lafranรงaise FRANC
Merlara ITALY
Donji Muc CROATIA
Athens GREECE
Eratosthenes 2015
April measures (Asia, Africa, America, Europe) 4 continents, 7 countries, 16 schools, 30 measurements
Ecole Publique, St FĂŠlix FRANCE
April
Primary School of Lardos, Rhodes GREECE
4th Junior High School Petroupoli GREECE
Ecole primaire 16 Rue de Russie Tunis TUNISIA
Chia Hwa Senior High School Chiayi City TAIWAN
Eratosthenes 2015
Special event : no noon shadow day 4 continents, 9 countries, 22 schools, 52 measurements
May
L.R & S.M Vissanji Academy Mumbai INDIA Istituzione Scolastica Monte Rosa A Pont Saint Martin ITALY
Colegio Salesiano Santo Domingo Savio Ubeda SPAIN Estancia JesuĂtica Alta Gracia ARGENTINA
Centro Educacional Nosso Mundo Rio de Janeiro BRAZIL
Eratosthenes 2015
Special event: Plaza Mayor de Alcobendas
June
Instituto de Ciencias Matematicas Alcobendas SPAIN
St Thomas RC Primary School Keith UNITED KINGDOM
DDMN Hellenic Navy Logistic Command Chania GREECE OŠ kneza Branimira Donji Muć CROATIA
1st High School Aigio GREECE Donji Muć CROATIA
Junior High School of Krokos Kozani GREECE
1st Kindergarten of Pylos Messinia GREECE
Eratosthenes 2015
Astronomical event: June solstice in Alexandria 4 continents, 15 countries, 34 schools, 64 measurements
June
Bibliotheca Alexandrina Alexandria EGYPT
荔園小學南校區 Shenzhen CHINA C V Raman Science Club Har Ki Pauri Haridwar INDIA
Govt. Senior Secondary School Karauli INDIA
Ecole de Gressoney Saint Jean ITALY
Eratosthenes 2015
Special event: Indian summer 3 continents, 8 countries, 14 schools, 25 measurements St Marys Convent School Ghoorpur Allahabad INDIA
July
Shri Vinayak College Of Education Baghpat INDIA
Govt. senior secondary school Dholpur INDIA
CV Raman Science Club Yamunanagar INDIA
Vashisth Vatsalya Public School Allahabad INDIA
Eratosthenes 2015
Special event: Greek teachers on holidays Lardos GREECE
Chalkida GREECE
July
Cephalonia GREECE
Athens GREECE Methoni GREECE
Selianitika GREECE
Pylos GREECE
Serres GREECE
Eratosthenes 2015
August measures (Asia, America, Europe) 3 continents, 3 countries, 4 schools, 8 measurements
August
Govt. senior secondary school Dholpur Tagawali INDIA
Govt. senior secondary school Dholpur Tagawali INDIA Kozani GREECE
Cephalonia GREECE
Fundaci贸n Caminos de Anisacate ARGENTINA
Eratosthenes 2015
Astronomical event: September Equinox 4 continents, 17 countries, 38 schools, 89 measurements
September
Aigio Anisacate Athens Scola Secundária Liceo N°1 鳳西國 中 FXM Baghpat Buenos Aires Palmela PORTUGAL Paysandú URUGUAY Kaohsiung TAIWAN Busteni Caracal Chania Donji Muć Đurđevac Grevena Ioannina José de la Quintana Kaohsiung School #11 2nd primary school Kavala Sverdlovsk UKRAINE Grevena GREECE Kozani Kuantan Lafrançaise Lardos Mărgineni Neoric Nis Palmela Pastida Paysandú Petroupoli Pont St Martin 3rd Junior High School Rio de Janeiro Kavala GREECE São João de Meriti Shenzhen Supetar Sverdlovsk Tunis Úbeda OŠ Neorić – Sutina CROATIA Yamunanagar
Colegiul Ion Kalinderu Busteni ROMANIA
GH Magheru School Caracal ROMANIA
Primary School Pastida GREECE
Eratosthenes 2015
October
Special event: Halloween
Eratosthenes 2015
October
Special event: World Space Week
Eratosthenes 2015
October measures (Asia, Africa, America, Europe) 4 continents, 8 countries, 21 schools, 41 measurements
October
Fondazione Mondo Digitale Rome ITALY
NEPA Parintins BRAZIL
Holy Mother Public School Yamunanagar INDIA SVPS Jagadhri Yamunanagar INDIA
oš kneza Branimira Brštanovo CROATIA
Eratosthenes 2015
Special event: Panhellenic congress
November
Geogebra workshop
Project presentation
Eratosthenes 2015
November measures (Asia, Africa, Europe) 3 continents, 5 countries, 12 schools, 26 measurements 3rd High School of Aspropyrgos Eleusis GREECE
November
OŠ Prežihovega Voranca Jesenice SLOVENIA
1st Junior High School Agioi Anargyroi Athens GREECE
Experimental College Agion Anargyron Athens GREECE
Eratosthenes 2015
Astronomical event: December Solstice
Marwari Vidyalaya HS Mumbai INDIA
Buonarroti primary school Marina di Carrara ITALY
December
4 continents, 13 countries, 31 schools, 81 measurements
Experimental College Ioannina, GREECE
C V Raman Science Club
Yamunanagar INDIA
CENOM Rio de Janeiro BRAZIL Trần Khai Nguyên High school
Hô Chi Minh City VIETNAM
Gh. Popescu School Margineni ROMANIA
3rd Junior HS of Korydallos
Piraeus GREECE
Eratosthenes 2015
2015 Statistics
Eratosthenes 2015
https://www.facebook.com/groups/Eratos http://www.fondation-lamap.org/fr/eratos https://twinspace.etwinning.net/5691 http://www.eratosthenes.eu