Why does rigel shine as brightly as betelgeuse eevne though rigel is much smaller than betelgeuse?

What does the simile ' clouds looked like puffs of cotton' mean? What there any literary devices used in raymonds run? Does Ernest Hemingway wear glasses? What is the analogy simple easy neater? How cable communication works? What phrase sets the tone for scene one in Macbeth? What is the resolution of Hansel and Gretel? How many colors are there in the kipling sauslito wheeled backpacks? Is Jeff the Killer Mexican? How do you write author details in bibliography? Where can you read Bizinghast online? Why did miller in Canterbury's Tale have a chap of sixteen stone? Is profoundly an adverb? Why did Jeanette walls write glass castle? What are the themes in The Fall of Five? How old is Gus from Tracy beaker returns? Who is Mackenzie Foy's agent? How many children do Amelia Reynolds and Richard whitely have? Who is the assumed speaker in Anabel lee? What has the author Yegane Shayegan written?

Why does rigel shine as brightly as betelgeuse eevne though rigel is much smaller than betelgeuse?