# Keywords: Aristarchus (13)

save
save to

selected filters:

Illustration of how Aristarchos might have got the distance to the nearest ... (more)

Illustration of how Aristarchos might have got the distance to the nearest stars that Archimedes reports in the Sandreckoner . (less)

Subject:
Mathematics and Statistics
Material Type:
Simulations
Collection:
GeoGebraTube
Provider:
GeoGebra
Remix and Share

# Discovery of the Solar System

This page is part of NASA's website "From Stargazers to Starships". It ... (more)

This page is part of NASA's website "From Stargazers to Starships". It discusses the evolution of scientific thought concerning the nature of the solar system, beginning with the earth-centered solar system advocated by Hipparchus and Ptolemy. Ptolemy's idea that the sun and planets moved around the Earth persisted for nearly a thousand years until Copernicus and Galileo, using his newly-invented telescope, began to understand that the Earth and its companion planets all orbited in around the sun. The site features text, pictures, a scientific illustration showing retrograde motion, and links to other relevant sites. (less)

Subject:
Science and Technology
Material Type:
Collection:
NASA
Provider:
Goddard Space Flight Center, NASA
Author:
David Stern, Ph.D.
No Strings Attached

# Finding the Size of the Sun and Moon

In this activity, learners build a simple pinhole viewer. They use this ... (more)

In this activity, learners build a simple pinhole viewer. They use this apparatus to project images from a variety of light sources, including a candle, the Sun, and the Moon. Learners will use the pinhole viewer to measure the size of the Sun and the Moon. This activity can also be used to demonstrate how cameras work in a basic sense. (less)

Subject:
Science and Technology
Material Type:
Activities and Labs
Collection:
SMILE Pathway
Provider:
U.C. Berkeley

# SizesProp01

Proposition 1 of the book On Sizes states that two equal spheres ... (more)

Proposition 1 of the book On Sizes states that two equal spheres are comprehended by one and the same cylinder, and two unequal spheres by one and the same cone which has its vertex in the direction of the lesser sphere; and the straight line dra (less)

Subject:
Mathematics and Statistics
Material Type:
Simulations
Collection:
GeoGebraTube
Provider:
GeoGebra
Remix and Share

# SizesProp02

Proposition 2 of the book On Sizes states that if a sphere ... (more)

Proposition 2 of the book On Sizes states that if a sphere be illuminated by a sphere greater than itself, the illuminated portion of the former sphere will be greater than a hemisphere (Heath 1913:358). (less)

Subject:
Mathematics and Statistics
Material Type:
Simulations
Collection:
GeoGebraTube
Provider:
GeoGebra
Remix and Share

# SizesProp03

Proposition 3 of the book On Sizes states that the circle in ... (more)

Proposition 3 of the book On Sizes states that the circle in the moon which divides the dark and the bright portions is least when the cone comprehending both the sun and the moon has its vertex at our eye (Heath 1913:362). (less)

Subject:
Mathematics and Statistics
Material Type:
Simulations
Collection:
GeoGebraTube
Provider:
GeoGebra
Remix and Share

# SizesProp04

Proposition 4 of the book On Sizes states that the circle CD ... (more)

Proposition 4 of the book On Sizes states that the circle CD which divides the seen and the unseen portions of the moon is not perceptibly different from a parallel great circle EF on the moon (Heath 1913:365). (less)

Subject:
Mathematics and Statistics
Material Type:
Simulations
Collection:
GeoGebraTube
Provider:
GeoGebra
Remix and Share

# SizesProp06

Proposition 6 of the book On Sizes states that the moon moves ... (more)

Proposition 6 of the book On Sizes states that the moon moves [in an orbit] lower than [that of] the sun, and, when it is halved, is distant less than a quadrant from the sun (Heath 1913:372). (less)

Subject:
Mathematics and Statistics
Material Type:
Simulations
Collection:
GeoGebraTube
Provider:
GeoGebra
Remix and Share

# SizesProp07

Proposition 7 of the book On Sizes states that the distance of ... (more)

Proposition 7 of the book On Sizes states that the distance of the sun from the earth is greater than 18 times, but less than 20 times, the distance of the moon from the earth (Heath 1913:377). In other words, the sun is 18 to 20 times farther aw (less)

Subject:
Mathematics and Statistics
Material Type:
Simulations
Collection:
GeoGebraTube
Provider:
GeoGebra
Remix and Share

# SizesProp13

Proposition 13 of the book On Sizes states that the straight line ... (more)

Proposition 13 of the book On Sizes states that the straight line subtending the portion intercepted within the earth's shadow of the circumference of the circle in which the extremities of the diameter of the circle dividing the seen and the uns (less)

Subject:
Mathematics and Statistics
Material Type:
Simulations
Collection:
GeoGebraTube
Provider:
GeoGebra
Remix and Share

# SizesProp14

Proposition 14 of the book On Sizes states that the straight line ... (more)

Proposition 14 of the book On Sizes states that the straight line joined from the centre of the earth to the centre of the moon has to the straight line cut off from the axis towards the centre of the moon by the straight line subtending the [cir (less)

Subject:
Mathematics and Statistics
Material Type:
Simulations
Collection:
GeoGebraTube
Provider:
GeoGebra
Remix and Share

# SizesProp15

Proposition 15 of the book On Sizes states that the diameter of ... (more)

Proposition 15 of the book On Sizes states that the diameter of the sun has to the diameter of the earth a ratio greater than 19/3, but less than 43/6 (Heath 1913:403). This means that the sun is (a mean of) 6_ times wider than earth, or that the (less)

Subject:
Mathematics and Statistics
Material Type:
Simulations
Collection:
GeoGebraTube
Provider:
GeoGebra
Remix and Share

# SizesProp17a

Proposition 17a in al-Tusi's medieval Arabic version of the book On Sizes ... (more)

Proposition 17a in al-Tusi's medieval Arabic version of the book On Sizes states that the ratio of the distance of the vertex of the shadow cone from the center of the moon (when the moon is on the axis of the cone containing the earth and the su (less)

Subject:
Mathematics and Statistics
Material Type:
Simulations
Collection:
GeoGebraTube
Provider:
GeoGebra
Remix and Share

# 2002 llaF ,gnivloS melborP gnireenignE dna sretupmoC ot noitcudortnI

.desu si egaugnal gnimmargorp avaJ ehT .gninnalp dna ,tnemeganam ,ecneics ,gnireenigne ni ... (more)

.desu si egaugnal gnimmargorp avaJ ehT .gninnalp dna ,tnemeganam ,ecneics ,gnireenigne ni smelborp gnivlos rof seuqinhcet gnipoleved no si sisahpmE .scipot decnavda detceles dna scihparg retupmoc ,gnihcraes dna gnitros ,serutcurts atad ,sdohtem laciremun ,secafretni resu lacihparg ,stpecnoc gnimmargorp revoc smelborp gnimmargorp ylkeeW .esruoc eht fo sucof eht si tnempoleved dna ngised erawtfos detneiro-tcejbO .snoitacilppa cifitneics dna gnireenigne rof sdohtem lanoitatupmoc dna tnempoleved erawtfos latnemadnuf stneserp esruoc sihT (less)

Subject:
Science and Technology
Material Type:
Assessments
Full Course
Homework and Assignments
Lecture Notes
Syllabi
Collection:
MIT OpenCourseWare
Provider:
M.I.T.
Author:
George Kocur
Remix and Share