COSMIC DISTANCES: HOW WE KNOW HOW FAR THINGS ARE IN SPACE

In this video, we explore one of the most intriguing questions in astronomy - how do we measure the distance of stars and galaxies? We discuss three methods that astronomers use to measure distance - parallax, Cepheid variables, and redshift - as well as a special type of star known as a "standard candle." We explain how each method works and the strengths and weaknesses of each. By the end of the video, you'll have a better understanding of how astronomers calculate the vast distances of objects in the universe. Join us as we delve into the fascinating world of space and astronomy!

Images:
https://www.khanacademy.org/science/in-in-class11th-physics/in-in-11th-physics-units-and-measurement/in-in-11th-physics-physical-quantities-and-their-measurement/a/intro-to-parallax

https://www.esa.int/Science_Exploration/Space_Science/Gaia/Parallax

https://it.wikipedia.org/wiki/Campo_ultra_profondo_di_Hubble#/media/File:Hubble_ultra_deep_field_high_rez_edit1.jpg

https://it.wikipedia.org/wiki/Cefeide#/media/File:Period-Luminosity_Relation_for_Cepheids.png