Exam 10: The Deaths of Stars

The electron spirals around a magnetic field line and emits photons in a process called _________________.

Why does a helium flash occur under some circumstances and not under other circumstances when helium fusion begins?

Open clusters tend to be ____ than globular clusters.

Why can't a massive star generate energy through iron fusion?

Planetary nebulae are sites of planet formation.

The theory that the collapse of a massive star's iron core produces neutrinos was supported by

A white dwarf is not necessarily the color white.

A Type II supernova produces a planetary nebula.

When mass is transferred from one star to another in a close binary system, __________ momentum is conserved.

Before it ejects a planetary nebula, a star is a

As a star like the Sun exhausts hydrogen in its core, the outer layers of the star

A(n) ____________________ is the expulsion of the outer layers of a moderate-mass star that has a degenerate carbon and oxygen core.

In the diagram below, which point indicates the location on the H-R diagram of a one-solar-mass star when it undergoes helium flash?

The helium core flash is a very short time event.

As a white dwarf cools its radius will not change because

A supernova is almost always associated with

Synchrotron radiation is produced by

The age of a star cluster can be determined from the ____________________ of the cluster.

Why can't lower-main-sequence stars become giant stars?

The _________ stars are giant stars fusing helium in their cores and then in their shells.