Characteristics of the Universe Test Review

Front

What is the fuel source for nuclear fusion in a Main Sequence star?

Back

Hydrogen gas

Front

What does the H-R diagram represent?

Back

The relationship between a star's temperature and its luminosity

Front

Which star has the lowest temperature?

Back

Star C

Front

Which color of stars is the hottest?

Back

Blue

Front

What does the Cosmic Microwave Background (CMB) represent?

Back

The farthest back in time that astronomers can observe with current technology

Front

What is a Main Sequence star?

Back

A star that is in the stable phase of its lifecycle, fusing hydrogen into helium in its core.

Front

What is luminosity?

Back

The total amount of energy emitted by a star per second.

Front

What is the significance of the H-R diagram in astronomy?

Back

It helps classify stars and understand their evolutionary stages.

Front

What is the relationship between a star's color and its temperature?

Back

Hotter stars appear blue, while cooler stars appear red.

Front

What is a supernova?

Back

A powerful and luminous explosion of a star at the end of its life cycle.