Exam 24: Stars, Space, and Galaxies

Which statement is not true about the Milky Way galaxy?

A/an __________ is smaller than a galaxy, emits more energy, and usually exhibits a large red shift.

One __________-__________ is the distance traveled by light in a year, 9.5 trillion kilometers.

The big bang occurred __________ years ago.

If you were to shine a flashlight beam, a radar beam, or any kind of radiation at a black hole, the energy would be absorbed.

Five billion years from now, the hydrogen in our Sun's core will be exhausted, and the Sun will become a red giant.

Jets of gas called __________ shoot upward from the chromosphere, looking like flames from a burning log.

Red, flame-like jets of gas that rise out of the Sun's corona are called __________.

When a star larger than 1.44 solar masses dies, a/an __________ explosion occurs after helium fusion has ended and after iron fusion has occurred.

The apparent brightness of a star is its luminosity as seen from Earth.

Up to 96 percent of our Universe is invisible dark matter.

If a star were orbiting a black hole, great masses of gas from the star would be sucked into the black hole, to disappear forever.

Neutron stars are:

A black hole:

When hydrogen fusion ends within the core of a star, the core becomes __________ and __________.

When we look at close objects, we see what is happening now, but when we look at distant objects, we see what happens in the future.

Stars and galaxies emit __________ generation energy.

A dying star with the mass of our Sun will eventually become a:

A red giant:

Neutron stars are extremely diffuse.