Albert Einstein- mi idolo

Un personaje favorito para muchos es Albert Einstein. ¿Será porque era un gran físico, o porque era un filósofo de la naturaleza, profundo e introspectivo, o ambos? O, ¿será sencillamente porque aparece en tantas pancartas, fotos, pinturas y publicaciones en libros para científicos y para niños y niñas, que perciben este personaje como un inspiradorContinue reading “Albert Einstein- mi idolo”

Trivia 10

The Ecliptic Following the path of the Sun around the eclipse, helps us to understand the four seasons and the nocturnal sky, in a rhythms that affects our life. Watch the video. http://www.showme.com/sh?h=xVhwWNk

Education and Religion

It is fascinating to read in the history of the sciences how knowledge was increasing thanks to the inquisitory mind of the human being. The curiosity to understand and rationally explain natural phenomena led to the creation of a scientific methodology that responds to the way we learn. Observation is, without a doubt, the firstContinue reading “Education and Religion”

Lesson 11

Total Orbital Energy The total orbital energy in a gravitational bound system is a constant. It will be the same calculated at aphelio as well as perihelium. The total energy will be equal to 1/2 <U> the time-average potential energy of the system. The symbol < > is an indication for the average over oneContinue reading “Lesson 11”

Lesson 10

Starting with the fact of the Second Law of Kepler, and using the result of the Orbital Angular Momentum as a constant value in terms so the reduced mass and the eccentricity of the ellipse, the Third Law of Kepler can be shown. The square of the period of a planet is directly proportional toContinue reading “Lesson 10”

Trivia 9

How do we orient ourselves in the sky? In the following video I will explain that every object in the sky has an “address” given by two numbers: Right Ascension (RA) and Declination (DEC). It is similar to how we locate cities on the Earth globe, using latitudes and longitudes, as we saw in theContinue reading “Trivia 9”

Trivia 8

The Earth globe is going to help us understand how we may locate objects in the Celestial sphere. A brief review of how we locate places (cities, lakes, etc.) on the Earth, will help us. This is elementary for most of you, but a review does not hurt. The sphere is divided in two hemispheresContinue reading “Trivia 8”

Trivia 7

From the illustration in Trivia 6, you must have gotten the idea that all what we see, is above the horizon. Wherever you live, you have your own horizon. Imagine a person 1.7 m tall, lying somewhere on the Earth that has a circumference length of 40,074 kilometers. That person has covered a surface ofContinue reading “Trivia 7”

Trivia 6

We can only see above the horizon, day or night. During the night sky observation, we see the stars above our horizon. Let us define some terms, for those of you who want to get oriented in the sky, and are doing it for the first time. With the help of a compass, you canContinue reading “Trivia 6”

Lesson 9

Velocities at perihelium and aphelion Using the deduced equation for the position vector in terms of the orbital angular momentum, we may develop equations to calculate the velocities in the perihelium and in the aphelion. errata: a correction must be made in the word “aphelium” and substitute it for the proper expression aphelion. Watch theContinue reading “Lesson 9”