PES 1100 Astronomy II
Test 2 Review
A star (no matter what its mass) spends most of its life:
When a star's inward gravity and outward pressure are balanced.
Elements contained in your body is NOT formed in the cores of stars during thermonuclear fusion?
Temperature is needed to fuse helium into carbon?
During the hydrogen shell burning phase a star…
What is the name of the path between the points labeled 8 and 9 in the HR diagram?
What is the name of the path between the points labeled 10 and 11 in the HR diagram?
What is the name of the path between the points labeled 11 and 12 in the HR diagram?
What is the name of the path between the points labeled 13 and 14 in the HR diagram?
When does the helium flash occur?
What is a planetary nebula?
What are black dwarfs?
The order of evolutionary stages of a star like the Sun
The Sun probably become a __________ in the very distant future
What characteristic of a star cluster is used to determine its age?
In globular clusters, the brightest stars will be:
Force that keeps a main sequence star from blowing apart?
Event that marks the birth of a star?
On a H-R diagram, a protostar would be:
Force that keeps a main sequence star from collapsing on itself?
A cloud fragment too small to form a star becomes:
Characteristic of globular star clusters
Characteristics of an open cluster of stars
Interstellar gas is composed of
Effect of “even thin clouds” of dust have on light passing through them?
"Fuzzy" dark or light patch in the sky is called a
A reflection nebula is caused by
Interstellar dust clouds are best observed at what wavelength?
Neutral hydrogen is most obvious in the electromagnetic spectrum at:
Most common molecule in a molecular cloud is:
What is proper motion?
Abs mag of the Sun
The M of a star is its brightness as seen from a distance of:
Two intrinsic properties used to classify stars
Physical property of a stars the spectral type measure?
Star’s color index determines
The Hertzsprung-Russell Diagram plots ________
Single most important characteristic in determining the course of a star's evolution
Magnitude difference of 5 corresponds to a ratio of brightness of
Magnitude difference of 0 corresponds to a ratio of brightness of
Subaru is an example of
Spectral classes of stars from hot to cold
Red stars and blue stars
The helium flash converts He nuclei into
Stars become a red giant more than once?