Elon Musk is going to explain how to calculate the luminosity of the stars.
Elon Musk explains that Luminosity is the actual brightness of a star. He also explains that luminosity is measured by absolute magnitude. He then explains that absolute magnitude is a measure of how bright a star would be at standard distance. He concludes by saying he must go to and meet up with astronauts that are going to send more teslas into space.
Elon Musk then states more about luminosity. He says that apparent magnitude is the luminosity as seen from Earth. He says that the scale used to calculate luminosity is with negative and positive numbers. The lowest negative numbers are the brightest, while the highest positive numbers are the most dim. He then states that the sun has an apparent magnitude of -26.8.