Question

Very hot and bright, large, lives 10,000 – 100,000 years very hot, not bright, small, and lives billions of years not very hot or bright, small, and lives trillions of years cool, medium-high brightness, large, and lives a few thousand years medium temperature and brightness, medium sized, and lives 10 billion years

Answer 1

The question deals with stellar characteristics like size, luminosity, and lifespan. Red giants, like Betelgeuse, are enormous and short-lived compared to smaller stars like our Sun, which has a medium temperature and a lifespan of about 10 billion years.

Step-by-step explanation:

The student's question pertains to different classes of stars and their characteristics, such as temperature, luminosity, size, and lifespan. Stars like red giants are massive stars that can grow so large that if one were to replace our Sun, its outer atmosphere might extend beyond the orbit of Mars. Red giants represent a later stage of stellar evolution, marking a star's transition into old age. One notable example is Betelgeuse, a young red supergiant that is already nearing the end of its life. In contrast, smaller stars, such as our Sun, have medium temperatures and brightness and can live for approximately 10 billion years. The correlation between the mass of a star and its lifespan is highlighted by the fact that larger stars tend to have shorter lifespans compared to smaller, less luminous stars.

The subject of this question is Physics. The question is asking about different types of stars based on their temperature, size, brightness, and lifespan.