the four seasons sang why does the sun keep on shining.
who sang why does the sun keep on shining?
the four seasons
Na
Na
tyson then explains the lifecycle of stars from their birth from interstellar clouds. he explains how stars like the sun keep their size due to the conflicting forces of gravity that pulls the gases in, and the expansion from escaping gases from the fusion reactions at its core. as the sun ages, it will grow hotter and brighter to the point where the balance between these reactions will fail, causing the sun to first expand into a red giant, and then collapse into a white dwarf, the collapse limited by the atomic forces. tyson explains how larger stars may form even more collapsed forms of matter, creating novas and supernovas depending on their size and leading to pulsars. massive stars can collapse into black holes. tyson then describes that stars can only be so large, using the example of eta carinae which is considered an unstable solar mass that could become a hypernova in the relatively near future. tyson ends describing how all matter on earth is the same stuff that stars are made of, and that light and energy from the stars is what drives life on earth.
sisters of the sun