Brightness
EM Spectrum/Spectra
H-R Diagram
Types of Stars
Potpourri
100
The brightness that a star appears to be from Earth.
What is apparent brightness?
100
The color of the coolest stars.
What is red or dark red?
100
H-R Diagram is a plot of brightness or luminosity vs. _____________.
What is temperature?
100
Type of stars that are very hot, but are not very luminous.
What are White Dwarfs?
100
According to the curve above, the color of the star would be _________________.
What is yellow or yellow-orange?
200
The total amount of energy being given off by a star.
What is luminosity?
200
Heat is referred to as this type of EM radiation. Stars like our Sun give off a majority of their radiation as this type of EM radiation.
What is infrared?
200
Luminosity or spectral classes are categorized by or arranged by ___________________.
What is temperature?
200
A very low mass star that does not have enough mass to even start a nuclear reaction.
What is a Brown Dwarf?
200
The distance of a star when the parallax angle is 1 arc second.
What is a parsec?
300
The true brightness of a star at a distance of 10 parsecs.
What is absolute brightness?
300
The hotter the star, the ___________ the wavelength of light given off by the star.
What is shorter?
300
Star that are the most luminous are in the ___________ of an H-R Diagram.
What is the upper portion?
300
Two stars that orbit a common center of mass.
What are binary stars?
300
The apparent change is a star's position when observed from different positions on the Earth?
What is stellar parallax?
400
This must be true if Star A and Star B are the same size and Star B has a higher luminosity.
What is that Star B is hotter?
400
The composition of a star can be found using this.
What are its spectral lines or bright-line spectrum?
400
The stars in the upper left of the H-R Diagram are ______________ and ______________ and are this color.
What are luminous and hot and blue in color?
400
Very luminous, large radius star.
What are red giants?
400
The smaller the parallax angle of a star, the ____________ it is.
What is farther?
500
On the scale for absolute and apparent magnitude, the brightest stars have a ____________ brightness.
What is negative?
500
This is how wavelength and frequency are related to one another.
What is indirectly or inversely?
500
Our Sun belongs to this numbered group on the diagram above.
What is III?
500
Most stars belong to this group of stars.
What are main sequence stars?
500
A cool by very luminous star must have ______________.
What is a large radius?