Charge Coupled Device Advantages
Principle objective of this lecture is to present on Charge Coupled Device Advantages. It is a device for the movement of electrical charge, usually from within the…
Physics
Charge Coupled Devices in Astronomy
Charge Coupled Devices first developed in the 1960s as memory storage devices. Sensitivity to light suggested imaging possibilities. Her briefly focus on History of CCDs; How do CCDs…
Lecture on Atmospheric Turbulence
Major objective of this lecture is to present on Atmospheric Turbulence. The atmosphere is an inhomegeneous medium with varying index of refraction in both time and space. Turbulence…
Diffraction of Rayleigh Criterion
The aim of this lecture is to present on Diffraction of Rayleigh Criterion. The telescope aperture produces fringes (Airy disc) that set a limit to the resolution…
Advantages of Heliocentric Model
Prime objective of this lecture is to present on advantages of Heliocentric Model. Main advantages of Heliocentric Model is easier to compute, correct orbital radii, predicts…
What is Planet?
General objective of this lecture is to present on What is Planet. The definition of planet, since the word was coined by the ancient Greeks, has included within its scope…
Modern View of the Solar System
Main objective of this lecture is to present on Modern View of the Solar System. The best view of the solar system is that from either of…
Ptolemy’s Geocentric Model
Ptolemy was approximating Kepler’s law, without knowing it. The reasons are: the elliptical orbits of the planet are close to a circle; the eccentric takes the role of…
Aristotle’s Model of Universe
Aristotle’s (384-322 BCE) model placed the superior planets in right order using their speed on the celestial sphere. He established a geocentric universe in which the…
Examples of Planetary Events
Principle purpose of this lecture is to present on Examples of Planetary Events. Some events are; Conjunctions: Two objects closest from Earth’s point of view. Stationary: When the ecliptic longitude…
What is the cause for Precession of Equinoxes?
Major purpose of this lecture is to present on cause for Precession of Equinoxes. Precession is caused by the torque applied by the Sun, the Moon, and…
Relation between Solar motion and the Calendar
The Sun’s position relative to Vernal Equinox is important for determining the seasons and the calendar. A major function of the calendar was for agriculture. Solar…
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