In the Universe the apparent motion of the stars is primarily due to the Earth spinning once per day on its north-south axis.The ACTUAL motions are the ones we would observe if we could step of the Earth, zoom out and look at the Earth - Moon - Sun system from afar. The stars are fixed (at least on the time scale of the Earth's 24 hour daily spin).
The difference in duration of the solar and the sidereal day is due to the motion of the Earth (the spaceship from which we observe the sky) in its orbit around the Sun. As you know, the Earth takes 1 year (about 365 days) to orbit the Sun. First, let's think about the APPARENT motion of the Sun due to the ACTUAL motion of the Earth over the course of a year.
The ecliptic is tilted with respect to the celestial equator. This is due to the fact that the Earth's axis is tilted 23.5° with respect to the plane of its orbit. From the perspective of a stationary Earth, it would appear that the ecliptic is tilted 23.5° with respect to the projection of the Earth's equator.
The elevation of the Sun varies at different times of the year in Boulder. Polaris is always 40° above the northern horizon in Boulder (same as Boulder's latitude). The celestial equator is also always fixed at 50° above the southern horizon. During the course of the year, the Sun will move 23.5° to the north of and to the south of the celestial equator. It will be furthest north during the summer solstice; it will be furthest south during the winter solstice.
The star Polaris is located very close to the North Celestial Pole. As a result, as the Earth rotates about its axis in its diurnal cycle, all the stars appear to rotate about us in the sky except for Polaris which stays fixed in its position near the North Celestial Pole. This fact gives us the ability to figure out our latitude on the Earth by looking for Polaris: To measure latitude on the Earth, measure the angle between Polaris and the horizon.
Thus if you were to stand at the North Pole, the North Celestial Pole would appear directly overhead to you, and Polaris would be overhead as well. The angle between what's directly overhead and the horizon is a right angle, or 90°. Thus your latitude is 90° North.
If you were at the equator, Polaris would appear to be on the horizon towards the north. Their is thus no difference between its position and the horizon, that is, its angle is 0°. Thus we are at a latitude of 0°.
Longitude, an east-west measurement is a little harder. For latitude, we had the equator and the North and South Poles as reference points. We can talk about being some number of degrees north or south of the equator. For locations east or west, there isn't any obvious natural reference position.
As a result, we have invented a 0 degree longitude position. This is defined to be a line running north-south through Greenwich, England, which is near London. All geographic locales on the globe have longitudinal positions relative to Greenwich. Boulder happens to be 105° West.
AstroParadise Android App offers a wide variety of horoscopes. The Birth Chart, gives you your natal chart as well as easy-to-read listings of the positions of the planets and houses in your chart, as well as the aspects between planets and points. Transits, for example, challenge and pressure us to make changes in our lives and in our attitudes toward our lives. They bring us joy and sometimes sorrow, they pull out parts of ourselves and "force" us to face them. Transits is much more complete than any daily horoscope program as it is tailored to your specific birth date and time. According to Chinese Astrology, your birth year tells you more than just your age. Find out what your Chinese zodiac sign reveals about you.
This application allows you to:
- Astrology transits real-time updates and users can consult the application any time of the day
- Planetary hours - astrological method to elect times to maximize the chances of success of any undertaking
- Full natal chart and astrological chart readings
- Western and Chinese zodiac astrology and horoscopes, information regarding your sign
- Easy to use location input system. no need to know latitude, latitude
- Ability to share your horoscope readings on social-networking sites
- The app will alert you with a voice alert when there's an new active transit
Get Free Download here
Astrology - 9000 Piece Puzzle
The difference in duration of the solar and the sidereal day is due to the motion of the Earth (the spaceship from which we observe the sky) in its orbit around the Sun. As you know, the Earth takes 1 year (about 365 days) to orbit the Sun. First, let's think about the APPARENT motion of the Sun due to the ACTUAL motion of the Earth over the course of a year.
The ecliptic is tilted with respect to the celestial equator. This is due to the fact that the Earth's axis is tilted 23.5° with respect to the plane of its orbit. From the perspective of a stationary Earth, it would appear that the ecliptic is tilted 23.5° with respect to the projection of the Earth's equator.
The elevation of the Sun varies at different times of the year in Boulder. Polaris is always 40° above the northern horizon in Boulder (same as Boulder's latitude). The celestial equator is also always fixed at 50° above the southern horizon. During the course of the year, the Sun will move 23.5° to the north of and to the south of the celestial equator. It will be furthest north during the summer solstice; it will be furthest south during the winter solstice.
The star Polaris is located very close to the North Celestial Pole. As a result, as the Earth rotates about its axis in its diurnal cycle, all the stars appear to rotate about us in the sky except for Polaris which stays fixed in its position near the North Celestial Pole. This fact gives us the ability to figure out our latitude on the Earth by looking for Polaris: To measure latitude on the Earth, measure the angle between Polaris and the horizon.
Thus if you were to stand at the North Pole, the North Celestial Pole would appear directly overhead to you, and Polaris would be overhead as well. The angle between what's directly overhead and the horizon is a right angle, or 90°. Thus your latitude is 90° North.
If you were at the equator, Polaris would appear to be on the horizon towards the north. Their is thus no difference between its position and the horizon, that is, its angle is 0°. Thus we are at a latitude of 0°.
Longitude, an east-west measurement is a little harder. For latitude, we had the equator and the North and South Poles as reference points. We can talk about being some number of degrees north or south of the equator. For locations east or west, there isn't any obvious natural reference position.
As a result, we have invented a 0 degree longitude position. This is defined to be a line running north-south through Greenwich, England, which is near London. All geographic locales on the globe have longitudinal positions relative to Greenwich. Boulder happens to be 105° West.
AstroParadise Android App offers a wide variety of horoscopes. The Birth Chart, gives you your natal chart as well as easy-to-read listings of the positions of the planets and houses in your chart, as well as the aspects between planets and points. Transits, for example, challenge and pressure us to make changes in our lives and in our attitudes toward our lives. They bring us joy and sometimes sorrow, they pull out parts of ourselves and "force" us to face them. Transits is much more complete than any daily horoscope program as it is tailored to your specific birth date and time. According to Chinese Astrology, your birth year tells you more than just your age. Find out what your Chinese zodiac sign reveals about you.
This application allows you to:
- Astrology transits real-time updates and users can consult the application any time of the day
- Planetary hours - astrological method to elect times to maximize the chances of success of any undertaking
- Full natal chart and astrological chart readings
- Western and Chinese zodiac astrology and horoscopes, information regarding your sign
- Easy to use location input system. no need to know latitude, latitude
- Ability to share your horoscope readings on social-networking sites
- The app will alert you with a voice alert when there's an new active transit
Get Free Download here
