1 The Celestial Equator and the Ecliptic 2 Seasonal Changes in the
... We now know that this is due to the precession of the equinoxes. This is fundamentally due to the precession of the Earth’s rotation axis (see Figure 1.10). Precession occurs when a rotating object is subject to a torque. The precession period is 25800 years. Since the location of the north celestia ...
... We now know that this is due to the precession of the equinoxes. This is fundamentally due to the precession of the Earth’s rotation axis (see Figure 1.10). Precession occurs when a rotating object is subject to a torque. The precession period is 25800 years. Since the location of the north celestia ...
Seasonal Motion
... Example: In Winter sun in Sagittarius, Gemini at night sky; in summer sun in Gemini, Sagittarius at night sky ...
... Example: In Winter sun in Sagittarius, Gemini at night sky; in summer sun in Gemini, Sagittarius at night sky ...
Day-7
... Work with a partner Read the instructions and questions carefully Discuss your answers with each other. ...
... Work with a partner Read the instructions and questions carefully Discuss your answers with each other. ...
The Celestial Sphere
... And The time that a star rises and sets changes as the year goes by too. ...
... And The time that a star rises and sets changes as the year goes by too. ...
Seasons and the Changing Sky
... • Rising and setting of Sun, Moon, stars as viewed from Earth → Rotating celestial sphere • Celestial poles: the points around which the stars appear to rotate • Celestial equator: an extension of the Earth’s equator onto the celestial sphere Circumpolar star! ...
... • Rising and setting of Sun, Moon, stars as viewed from Earth → Rotating celestial sphere • Celestial poles: the points around which the stars appear to rotate • Celestial equator: an extension of the Earth’s equator onto the celestial sphere Circumpolar star! ...
PPT - UBC
... when plane contains centre. The line perpendicular to plane that passes through the centre intersects sphere at poles P, P’. Only 1 great circle passes through any 2 given points on sphere, Q, Q’. Arc QQ’ is shortest distance between these points. ...
... when plane contains centre. The line perpendicular to plane that passes through the centre intersects sphere at poles P, P’. Only 1 great circle passes through any 2 given points on sphere, Q, Q’. Arc QQ’ is shortest distance between these points. ...
Geology/Physics 360
... • Polaris the north star is at the celestial north pole • The earth rotates counterclockwise (as viewed from above) therefore stars rise in the east and set in the west (so does the sun and the moon) • The line that the sun traces across the celestial sphere is the ecliptic • The sun reaches 23.5 d ...
... • Polaris the north star is at the celestial north pole • The earth rotates counterclockwise (as viewed from above) therefore stars rise in the east and set in the west (so does the sun and the moon) • The line that the sun traces across the celestial sphere is the ecliptic • The sun reaches 23.5 d ...
Planetarium Key Points
... Constellation shape change with epoch and observer position; shape is not for ever becouse of star’s proper motion, but no detectable change during human life at naked eye Constellations and asterisms; we use structures invented by assirian priests in XII century BC: Orion, Ursa Major, Ursa Mino ...
... Constellation shape change with epoch and observer position; shape is not for ever becouse of star’s proper motion, but no detectable change during human life at naked eye Constellations and asterisms; we use structures invented by assirian priests in XII century BC: Orion, Ursa Major, Ursa Mino ...
Planetarium Key Points
... Constellation shape changes with epoch and their visibility changes with epoch and observer position; shape is not for ever because of star’s proper motion, but no detectable change is observable during human life, at naked eye Constellations and asterisms; we use structures invented by assirian ...
... Constellation shape changes with epoch and their visibility changes with epoch and observer position; shape is not for ever because of star’s proper motion, but no detectable change is observable during human life, at naked eye Constellations and asterisms; we use structures invented by assirian ...
THE CELESTIAL SPHERE
... imagine the stars to remain fixed on a sphere of very large radius with the earth at its centre. We call this sphere the celestial sphere. At any point of time we can only see the upper half of the celestial sphere. The point on this dome right above our head is known as zenith. The lower boundary o ...
... imagine the stars to remain fixed on a sphere of very large radius with the earth at its centre. We call this sphere the celestial sphere. At any point of time we can only see the upper half of the celestial sphere. The point on this dome right above our head is known as zenith. The lower boundary o ...
ecliptic
... The Earth's rotation is counter clockwise looking down on the N pole, and results in the apparent motion of the celestial sphere -- everything rises in the East and sets in the west. ...
... The Earth's rotation is counter clockwise looking down on the N pole, and results in the apparent motion of the celestial sphere -- everything rises in the East and sets in the west. ...
Planetarium Key Points
... Constellation shape change with epoch and observer position; shape is not for ever becouse of star’s proper motion, but no detectable change during human life at naked eye Constellations and asterisms; we use structures invented by assirian priests in XII century BC: Orion, Ursa Major, Ursa Mino ...
... Constellation shape change with epoch and observer position; shape is not for ever becouse of star’s proper motion, but no detectable change during human life at naked eye Constellations and asterisms; we use structures invented by assirian priests in XII century BC: Orion, Ursa Major, Ursa Mino ...
Name: Period: Date: The Celestial Sphere What is the Celestial
... The diurnal motion affects all objects in the sky and does not change their positions ___________ to each other. Some objects also appear to move with respect to the other objects on the celestial sphere. These are the "wanderers" of the ancient astronomers: the _______________, the __________, and ...
... The diurnal motion affects all objects in the sky and does not change their positions ___________ to each other. Some objects also appear to move with respect to the other objects on the celestial sphere. These are the "wanderers" of the ancient astronomers: the _______________, the __________, and ...
Astronomy Quiz Units 1 to 3
... A conceptual model of the Sky Carries the stars Appears to rotate westward once every 23h 56m 4.09s NCP, SCP and Celestial Equator are aligned with the Earth’s north pole, south pole and equator respectively. Is divided into regions using Right Ascension and Declination. 8. What are specia ...
... A conceptual model of the Sky Carries the stars Appears to rotate westward once every 23h 56m 4.09s NCP, SCP and Celestial Equator are aligned with the Earth’s north pole, south pole and equator respectively. Is divided into regions using Right Ascension and Declination. 8. What are specia ...
Astronomical Terms - Crossroads Academy
... astronomical declination…angle above the horizon (not the same as compass declination…error of a compass from true north) similar to geographical latitude…used to locate stars in the celestial sphere local noon…the highest point of the sun in any day in a specific location therefor giving the shorte ...
... astronomical declination…angle above the horizon (not the same as compass declination…error of a compass from true north) similar to geographical latitude…used to locate stars in the celestial sphere local noon…the highest point of the sun in any day in a specific location therefor giving the shorte ...
29:52 Characteristics and Origins of the Solar System January 25
... The motions discussed in this lecture, the rotation of the Earth on its axis, and its orbital motion around the Sun, define two important lines on the sky. They are defined in pictorial form in Figure 2.11 of the textbook. The first of these is the celestial equator. This is the projection of the Ea ...
... The motions discussed in this lecture, the rotation of the Earth on its axis, and its orbital motion around the Sun, define two important lines on the sky. They are defined in pictorial form in Figure 2.11 of the textbook. The first of these is the celestial equator. This is the projection of the Ea ...
Seasonal Motion
... • The stars are “fixed” to the rotating sky globe They move from East to West and also from near to the horizon to higher up in the sky ...
... • The stars are “fixed” to the rotating sky globe They move from East to West and also from near to the horizon to higher up in the sky ...
Planetarium Key Points
... Constellation shape change with epoch and observer position; shape is not for ever becouse of star’s proper motion Constellations and asterisms; we use structures invented by assirian priests in XII century BC: Orion, Ursa Major, Ursa Minor, Scorpion, Gemini, Taurus, the Summer Triangle..... U ...
... Constellation shape change with epoch and observer position; shape is not for ever becouse of star’s proper motion Constellations and asterisms; we use structures invented by assirian priests in XII century BC: Orion, Ursa Major, Ursa Minor, Scorpion, Gemini, Taurus, the Summer Triangle..... U ...
Lecture 3 - Empyrean Quest Publishers
... --gives angular position of objects in the sky, has arbitrary size, and earth turns underneath it. Zenith--point directly overhead on sphere. Local Coordinates—altitude and azimuth. Celestial poles--points just above N. and S. pole. Meridian--circle passing through poles and zenith. A great circle-- ...
... --gives angular position of objects in the sky, has arbitrary size, and earth turns underneath it. Zenith--point directly overhead on sphere. Local Coordinates—altitude and azimuth. Celestial poles--points just above N. and S. pole. Meridian--circle passing through poles and zenith. A great circle-- ...
The Celestial E-Sphere
... animation that was aesthetically pleasing whilst being of obvious educational value. In particular the animation is very smooth, commonly running at 60 frames per second on a reasonably good machine equipped with a graphics card. Additional development Features were added that corresponded to a typi ...
... animation that was aesthetically pleasing whilst being of obvious educational value. In particular the animation is very smooth, commonly running at 60 frames per second on a reasonably good machine equipped with a graphics card. Additional development Features were added that corresponded to a typi ...
ecliptic. - Valhalla High School
... So, 360° = 24 h R.A., 15° = 1 h R.A., and 1° = 4 min R.A. Right ascension increases from west to east (note that we are looking at the exterior of the celestial sphere in the above picture). ...
... So, 360° = 24 h R.A., 15° = 1 h R.A., and 1° = 4 min R.A. Right ascension increases from west to east (note that we are looking at the exterior of the celestial sphere in the above picture). ...
Armillary sphere
An armillary sphere (variations are known as spherical astrolabe, armilla, or armil) is a model of objects in the sky (in the celestial sphere), consisting of a spherical framework of rings, centred on Earth or the Sun, that represent lines of celestial longitude and latitude and other astronomically important features such as the ecliptic. As such, it differs from a celestial globe, which is a smooth sphere whose principal purpose is to map the constellations.With the Earth as center, an armillary sphere is known as Ptolemaic. With the sun as center, it is known as Copernican.