Semester 1 Astronomy Final

Front

What happens to a low mass star after the main sequence?

Back

It becomes a red giant.

Front

Which characteristic is NOT used to classify stars?

Back

Shape.

Front

What does Kepler's 3rd law state?

Back

A planet's orbital period is proportional to the size of its orbit.

Front

True or False: Most of the stars we see in our night sky belong to other galaxies.

Back

False.

Front

In which state does a star spend the majority of its time?

Back

Main sequence.

Front

What is a red giant?

Back

A late stage in the life cycle of a low mass star where it expands and cools after exhausting hydrogen in its core.

Front

Define a black dwarf.

Back

A theoretical stellar remnant that occurs when a white dwarf has cooled sufficiently that it no longer emits significant heat or light.

Front

What is the main sequence in stellar evolution?

Back

The phase in a star's life where it fuses hydrogen into helium in its core, which is the longest stage of a star's life.

Front

What is the significance of a star's color?

Back

A star's color indicates its temperature; blue stars are hotter, while red stars are cooler.

Front

What is a supergiant star?

Back

A very large star that is much brighter than a giant star, often at the end of its life cycle.