Keywords: Obliquity (7)

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Cosmology and Astronomy: Apsidal Precession (Perihelion Precession) and Milankovitch Cycles
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Cosmology and Astronomy: Apsidal Precession (Perihelion Precession) and Milankovitch Cycles

This 7-minute video lesson looks at apsidal precession (Perihelion Precession) and Milankovitch ... (more)

This 7-minute video lesson looks at apsidal precession (Perihelion Precession) and Milankovitch Cycles. [Cosmology and Astronomy playlist: Lesson 75 of 85] (less)

Subject:
Science and Technology
Material Type:
Video Lectures
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Khan, Salman
Cosmology and Astronomy: Milankovitch Cycles   Precession and Obliquity
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Cosmology and Astronomy: Milankovitch Cycles Precession and Obliquity

This 13-minute video lesson looks at how changes in Earth's rotation can ... (more)

This 13-minute video lesson looks at how changes in Earth's rotation can effect Earth's seasons and climate. It discusses Milankovitch Cycles, Precession, and Obliquity. [Cosmology and Astronomy playlist: Lesson 71 of 85] (less)

Subject:
Science and Technology
Material Type:
Video Lectures
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Khan, Salman
Galileo Sunspots
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Galileo Sunspots

The EJS Galileo Sunspots Model illustrates the motion and changes in appearance ... (more)

The EJS Galileo Sunspots Model illustrates the motion and changes in appearance of sunspots as they move across the disk of the Sun. Galileo's observation of the changing appearance of sunspots around 1611 provided strong evidence that the spots were actually blemishes on the surface of the Sun, an idea that conflicted with the Aristotelean notion of the perfections of the heavens. Through these observations Galileo was able to determine the obliquity of the Sun (the angle between the Sun's equator and the Ecliptic plane) as well as the rotational period of the Sun. The simulation shows four randomly generated sunspots, and one sunspot that has a user-defined latitude (to allow the user to examine the behavior of sunspots at various latitudes). All sunspots are oval in shape. As the spots move across the Sun their appearance changes due to foreshortening and a slight tilt as the spots approaches the limb (or edge) of the solar disk. These effects come about because the Sun's surface is spherical, not flat. So the sunspot changes it orientation relative to the viewer as it moves around on the Sun's surface. In addition to controls that allow the user to define the latitude of one of the sunspots, this model allows the user to set the obliquity of a line representing the Sun's equator. The user can adjust the obliquity of this line until the sunspots all move parallel to the line. In this case the obliquity of the line is the actual obliquity of the Sun. In addition, the model displays the elapsed time (in days) so that the user can determine the rotational period of the Sun by measuring the time required for a sunspot to complete its motion around the Sun. (Note that the period of a sunspots motion is latitude-dependent, as it is in the real Sun.) (less)

Subject:
History, Law, Politics
Physics
Space Science
Technology
Education
Material Type:
Instructional Material
Provider:
ComPADRE Digital Library
Provider Set:
ComPADRE: Resources for Physics and Astronomy Education
Author:
Todd Timberlake
On the Shoulders of Giants - Milutin Milankovitch
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On the Shoulders of Giants - Milutin Milankovitch

Milutin Milankovitch formulated a comprehensive mathematical model that calculated latitudinal differences in ... (more)

Milutin Milankovitch formulated a comprehensive mathematical model that calculated latitudinal differences in solar radiation upon the Earth's surface and the corresponding surface temperatures for 600,000 years prior to the year 1800. Readers can learn how Milankovitch developed his theories and how they were confirmed years later by climatic data found in deep-sea sediment cores, which indicated that major variations in climate such as ice ages were closely associated with changes in the geometry of Earth's orbit. This is part of NASA's Earth Observatory series of publications entitled "On the Shoulders of Giants," which are about scientists who revolutionized our understanding of the atmosphere, oceans, climate, and environment. (less)

Subject:
Science and Technology
Material Type:
Readings
Provider:
NASA
Provider Set:
NASA
Author:
Yoram Kaufman
On the Shoulders of Giants - Milutin Milankovitch
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On the Shoulders of Giants - Milutin Milankovitch

Milutin Milankovitch formulated a comprehensive mathematical model that calculated latitudinal differences in ... (more)

Milutin Milankovitch formulated a comprehensive mathematical model that calculated latitudinal differences in solar radiation upon the Earth's surface and the corresponding surface temperatures for 600,000 years prior to the year 1800. Readers can learn how Milankovitch developed his theories and how they were confirmed years later by climatic data found in deep-sea sediment cores, which indicated that major variations in climate such as ice ages were closely associated with changes in the geometry of Earth's orbit. This is part of NASA's Earth Observatory series of publications entitled "On the Shoulders of Giants," which are about scientists who revolutionized our understanding of the atmosphere, oceans, climate, and environment. (less)

Subject:
Chemistry
Geoscience
Physics
Space Science
Material Type:
Reference
Provider:
UCAR Staff
Provider Set:
NASA Earth and Space Science Education Collection
Author:
Yoram Kaufman
2002 llaF ,gnivloS melborP gnireenignE dna sretupmoC ot noitcudortnI

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)