'Solar day' diaporamas de présentation

The Reasons for Seasons

The Reasons for Seasons. Edward M. Murphy Space Science for Teachers 2005. Day Night Cycle. Rotation vs. Revolution. Rotation is the spin of an object about its axis. The Earth rotates once a day (once every 24 hours). Revolution is the orbit of one object around another.

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The Celestial Sphere

The Celestial Sphere. The Caracol at Chichen Itza. Built around 1000AD. The Mayans developed a very accurate calendar. They also placed special significance on Venus. Human Sacrifices were routinely performed to worship Venus. Name that constellation. Orion the Hunter. North Pole.

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Class Information for PHYS/ASTR 1050 can be found at: www.physics.utah.edu Click on courses Click on The Solar Syste

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Chapter S1 Celestial Timekeeping and Navigation

Chapter S1 Celestial Timekeeping and Navigation. S1.1 Astronomical Time Periods. Our goals for learning:. How do we define the day, month, year, and planetary time periods? How do we tell the time of day? When and why do we have leap years?.

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CALANDARS AND SUNDIALS:

CALANDARS AND SUNDIALS:. Astronomical basis of calendars . The principal astronomical cycles are the day (based on the rotation of the Earth on its axis), the year (based on the revolution of the Earth around the Sun), and the month (based on the revolution of the Moon around the Earth). .

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AST 111 Lecture 7

AST 111 Lecture 7. Eclipses, Solar and Sidereal Days, Precession. Eclipses. An eclipse is when one celestial object passes in front of another. Eclipses. Eclipses. Transit: Small object in front of large Occultation: Large object in front of small. Eclipses. Eclipses. Lunar Eclipses.

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Renaissance Cosmology

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Cosmic Brownies

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Discovering the Universe For Yourself

Discovering the Universe For Yourself. Discovering the Universe for Yourself Describing Positions. Representing position with coordinates: Flat surface: 2 dimensions coordinate system of this room coordinate system of Rocklin Surface of a sphere: 2 dimensions coordinate system of Earth

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Chapter 1 Test Review

Chapter 1 Test Review. 1. According to the heliocentric model, the reason the planets always appear to be near the ecliptic is that a ) the ecliptic is only 23.5 degrees from the celestial equator. b ) the planets revolve around the Sun in nearly the same plane.

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Chapter 9 Tides

Chapter 9 Tides. Look For The Following Key Ideas In Chapter 9. Tides are huge shallow-water waves-the largest waves in the ocean. Tides are caused by a combination of the gravitational force of the moon and sun and the motion of Earth.

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Positions on the Celestial Sphere

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PHY2505S Atmospheric Radiation & Remote Sensing Lecture 4 23/1/03 The Solar Radiation Source

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Basic Astronomy

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Celestial Motions and Time

Celestial Motions and Time. Solar Time. Time measured with respect to the Sun. Apparent solar day is the interval between two successive returns of the Sun to the local meridian

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Lecture 2, Coordinate systems in astronomy

Lecture 2, Coordinate systems in astronomy. The horizon coordinate system. Diurnal motion of celestial objects in horizon system. Objects move on diurnal circles centered on the celestial pole. Why sky changes appearance in different places on the Earth.

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The equatorial coordinate system

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