Eratosthenes 2015 highlights

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