The Eratosthenes The Eratosthenes experimentexperiment

The Eratosthenes The Eratosthenes experimentexperiment

Created by :Created by :

Gyula Nyerges Gyula Nyerges

Created by :Created by :

Gyula Nyerges Gyula Nyerges

How can we measure Earth??How can we measure Earth??

Is Earth really round? Is Earth really round?

Lunar eclipse Lunar eclipse The shape of the The shape of the Earth's shadow Earth's shadow always looks like always looks like an arc of a circle.an arc of a circle.

The The dimensions dimensions

of Earth of Earth

Eratosthenes' Eratosthenes' measuremeasure

The web site of the experiment...The web site of the experiment...

The The announcement announcement appeared on appeared on the Internet in the Internet in spring.spring.

...and the Hungarian version ...and the Hungarian version

Translation Translation only took a only took a few days.few days.

The measuring The measuring

We marked the shadows of the sticks in every five minutes.

Data analysis Data analysis The distance between

the Sun and the zenith: 26°30' +/- 30'

A different method A different method

We can read the angle on the protractor right away.

Studying sunspots Studying sunspots

There was even There was even some time for some time for telescopic work.telescopic work.

CCompetitionompetition

Czeech Republic

Hungary

CCompetitionompetition

Hungary

Hungary

Romania

Czech Republic

CCompetitionompetition

PolandHungary

Hungary Czech Republic

CCompetitionompetition

KoreaCzech Republic

Macedonia Hungary

THE ENDTHE END