Category Archives: Trivia

La luminosidad de una estrella. Ejemplo el sol. Sabemos que la luminosidad de una estrella es directamente proporcional a la cuarta potencia de su temperatura absoluta. En el siguiente video podemos repasar la formula de la luminosidad, y aplicarla al sol, con un ejemplo impresionante.

Planes de la NASA para una mision a Venus La NASA anuncio que va a enviar dos nuevas misiones a Venus como parte de un programa de descubrimiento. Las naves espaciales llevan el nombre de DAVINCI, que tiene por objetivo el estudio de la atmosfera de Venus, y VERITAS, que tiene el fin de trazarContinue reading “Trivia 16”

Three Practice Problems for the formulas and concepts discussed in the Lectures 19 and 20. Examples have been taken from the HIP catalog for Fomalhaut, Antares, and Deneb. We will calculate distances knowing the apparent and absolute magnitudes, the parallaxes, and intrinsic luminosities, in the following video. https://www.showme.com/sh?h=lH1PMeG

El planisferio estelar, or Star and Planet Locator. El planisferio nos da una muy buena oportunidad para disfrutar del cielo nocturno a falta de un telescopio. No es costoso y es facil de llevar. En el video, vais a ver como se usa. Disfruta! http://www.showme.com/sh?h=CeinlGi

Stars That do not Set Remember you cannot see below your horizon. Consider yourself exactly at the North Pole. You will see all the stars in circular trajectories around Polaris, that you can see as your Zenith is on Polaris. If you are exactly in the Equator, all stars are rising in the East andContinue reading “Trivia 13”

How do we know the Earth Rotates? Sometimes we think to have a good argument to teach that the Earth rotates by just looking at the sky and watch the stars moving around “us” from East to West, to conclude that the Earth rotates from West to East. That is all right, but it inContinue reading “Trivia 12”

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

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”