<transcript><audio_40> se llama a través de bisectores pero bueno, hay muchas otras técnicas no las voy a decir todas entonces, tenemos dos tipologías</transcript><transcript><audio_41> Bueno, esas son las formas de observar, a partir de fotometría y a partir de espectroscopía. Yo les hablaba de que existen dos tipos de estrellas variables, estrellas variables extrínsecas y estrellas variables intrínsecas.</transcript><transcript><audio_42> pues bueno, es por procesos externos. Y básicamente estamos hablando de una de estrellas binarias eclipsantes. Estrellas binarias eclipsantes, simplemente tenemos una estrella girando al</transcript><transcript><audio_43> Entonces, en algún momento tenemos la ocultación de una estrella, ¿cierto? Y en otro momento, pues tenemos el brillo de las dos estrellas, ¿sí? En esa imagen se pueden observar los dos eclipses, el eclipse primario y el eclipse secundario.</transcript> of them is called through vi sectors but but well there are many other techniques no no  I'm going to say them then we have two types of variable stars. Well, those are the ways to observe from photometry and from spectroscopy. I was talking to you about the fact that there are two types of variable stars. Extrinsic variable stars and intrinsic variable stars. The extrinsic ones. Well, well.  It is due to external processes and basically we are talking about one of binary stars eclipse before to binary stars eclipse before we simply have one star revolving around the other if this one then at some point we have the occultation of a certain star and at another moment we have the brightness  of the two stars, yes in that image you can observe the two eclipses, the primary eclipse and the secondary eclipse,
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