[The library of Eratosthenes]

Site description

Eratosthenes experiment : Put a staff to the sun, measure its shadow when the sun is at its highest point, deduce the angle of the solar rays compared with the vertical staff, then exchange your results with another class under another latitude. Then, a few geometrical drawings and a rule of three give you the length of earth’s meridian.

Eratosthenes Network

The community on social network: Facebook group : facebook.com/groups/Eratos/

The experiment of Eratosthenes

Hello !

This Web site is under construction. You will find the totality of the articles on the Web site in English or French . All the articles are not translated yet. Many translations need to be improved. Thank you for your patience and your comprehension.

Find a partner

janvier/january

16 Beloeil
22 Cañada de Gómez
28 L’Albenc
29 Cañada de Gómez

février/february

05 Lafrançaise
06 Lafrançaise
14 Cañada de Gómez
20 Beloeil
25 Cañada de Gómez

mars/march

15 Lafrançaise
16 Hồ Chí Minh City - Lafrançaise
18 Beloeil - Cañada de Gómez - Port Lincoln
19 Leadville - Pozzallo
20 Arras - Bar Harbor - Cañada de Gómez - Lafrançaise - Madison - Nutley - Warangal
21 Adelaide - Duluth
22 Leadville - Toszek
23 Montreal - Pozzallo
24 Duluth - Lafrançaise - Vastseliina
25 Jakarta
26 Xiamen

avril/april

03 Lafrançaise
07 Lafrançaise
14 Lafrançaise
16 Xewkija
18 Lafrançaise
20 Lafrançaise
21 Lafrançaise - Cluj Napoca
22 Beloeil - Cluj Napoca
23 Cluj Napoca
26 Cañada de Gómez

mai/may

01 Elizabeth
09 Arras 2005 2008 - Lafrançaise 2005 2006
11 Arras - Cañada de Gómez - Lafrançaise - Xewkija
13 Arras
16 Beloeil - Lafrançaise 2006 2008
19 Lafrançaise - Pujato
20 Beloeil - Lafrançaise 2005 2008
21 Cluj Napoca
23 Arras - Lafrançaise
25 Arras - Cañada de Gómez - Lafrançaise - Theux
30 Cluj Napoca - Lafrançaise 2005 2008
31 Lafrançaise

juin/june

02 Lafrançaise
03 Lafrançaise
04 Cañada de Gómez - Lafrançaise
06 Cañada de Gómez
08 Cañada de Gómez - Lafrançaise
09 Allahabad - Arras - Cluj Napoca 2006 2008 - Lafrançaise 2005 2006 2008 - Pleiku - Pujato - Xewkija
10 Cluj Napoca - Lafrançaise 2005 2008
12 Lafrançaise
13 Lafrançaise
15 Cañada de Gómez - Lafrançaise - Xewkija
16 Adelaide - Allahabad - Arras - Beloeil - Cluj Napoca - Lafrançaise 2006 2008
17 Lafrançaise
18 Lafrançaise
19 Lafrançaise
20 Arras - Cañada de Gómez
21 Lafrançaise - Xewkija

juillet/july

21 Cañada de Gómez
26 Meerut - Cluj Napoca - Pleiku

août/august

21 Cañada de Gómez
25 Arras
29 Panama city

septembre/september

17 Lafrançaise - Stanford
18 Lafrançaise
19 Cañada de Gómez - Lafrançaise - New York
20 Lafrançaise - Wharton
21 Adelaide - Cañada de Gómez - Chillicothe - Lafrançaise - Warren - Yuba City
23 Auckland - Greenfield Park - Pachuca
24 Arras - Baungon - Gulf Breeze - Lafrançaise - Maricopa - Virginia Beach
25 Lafrançaise - New York - Wrocław
26 Placerville
28 Arras - Lafrançaise - Naples

octobre/october

10 Lafrançaise
21 Cañada de Gómez
24 Cañada de Gómez

novembre/november

09 Lafrançaise - Palma de Mallorca
10 Cañada de Gómez
16 Cañada de Gómez - Lafrançaise
28 Beloeil
29 Cañada de Gómez
30 Arras - Lafrançaise

décembre/december

01 Palma de Mallorca
12 Cañada de Gómez
14 Barranha - Lafrançaise
20 Arras
21 Arras - Lafrançaise

Lucia Gutu ’s editorial : WHY A PROJECT ?

WHY A PROJECT ?

The most recent articles

Diaporama

Wednesday 25 December 1996 by perbosc

> continue

Blog archive

Sunday 27 October 1996 by perbosc

2004-2005 Eratosthène (Arras-Lafrançaise) 2005-2006 Eratosthènes français-español 2005-2006 Eratosthenes english-العربي 2007-2006 EratosTwin 2007-2007 EratosNoon(summer - autumn) 05-06-07-08 Eratosthène archives in french

> continue

Angle of the sun

1996 by perbosc

height of the gnomon : length of the shadow : angle of the sun :

> continue

Ephemerides of the cities

1996 by perbosc

day month year 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 (...)

> continue

Conversions

1996 by perbosc

deg/min/sec : decimal degrees : decimal degrees : deg/min/sec :

> continue

Distances

1996 by perbosc

latitude#1 (deg/min/sec) : N S latitude#2 (deg/min/sec) : N S Difference : Distance :

> continue

General ephemeride

1996 by perbosc

date (jj-mm-aaaa) : latitude (degr-min) : N S longitude (deg-min) : E O angle / ángulo : ombre / shadow / sombra(gnomon 1m): midi solaire / solar noon:

> continue

Gallery of gnomons

1996 by perbosc

Gallery of gnomons Pencils gnomons Gnomons held with the hand Gnomons sticked in the ground Gnomons laid down on a board, without fixing Gnomons fixed on a board Bottle gnomon Other ways of fixing a gnomon Ready made gnomons Pencils gnomons Xewkija Alexandria (...)

> continue

Localize the schools

1996 by perbosc

Localize the schools Open in a Google window / Ouvrir dans une fenêtre Google Open in a new window / Ouvrir dans une nouvelle fenêtre (september 2007) City Country Latitude Longitude School Adelaïde Australia -034.900° +138.600° Hamilton Secondary College (...)

> continue

Projects

1996 by perbosc

Projet eTwinning : eTwinning & Twinspace EAAE France (Eratosthène groupspace) isheyevo.ens-lyon.fr/eaae/groupspace/eratosthene The Noon Day Project : www.k12science.org/noonday Following in the footsteps of Eratosthenes : www.mapmonde.org/eratos (...)

> continue