Astronomy Regents Review

Front

What is the relationship between temperature and luminosity of main sequence stars?

Back

As temperature increases, luminosity increases.

Front

Which star may once have been similar to our Sun in mass and luminosity?

Back

Procyon B.

Front

What happens to the eccentricity of an ellipse when the distance between the foci is increased?

Back

The eccentricity increases.

Front

What event occurred more than 10 billion years ago?

Back

Big Bang.

Front

How is energy produced in the cores of main sequence stars?

Back

Lighter elements undergo fusion into heavier elements.

Front

Define main sequence stars.

Back

Stars that are in a stable phase of stellar evolution, fusing hydrogen into helium in their cores.

Front

What is the Big Bang Theory?

Back

The leading explanation for the origin of the universe, stating it began from a singularity and has been expanding ever since.

Front

What is stellar fusion?

Back

The process by which stars generate energy by fusing lighter atomic nuclei into heavier ones.

Front

What is the significance of a star's mass in its life cycle?

Back

A star's mass determines its temperature, luminosity, and the stages it will go through in its life cycle.

Front

What is eccentricity in relation to ellipses?

Back

A measure of how much an ellipse deviates from being circular; higher values indicate more elongated shapes.