Star Distances
Brightness and Stellar Spectra
HR Diagram
Star Masses and Census of Stars
Random
100
One method to find the distance to a star
What is TRIANGULATION METHOD
100
THE TWO FACTORS FOR A STAR'S ABSOLUTE MAGNITUDE
What is TEMPERATURE AND DIAMETER
100
THE LETTERS THAT DEFINE THE SPECTRAL CLASSES IN AN HR DIAGRAM IN ORDER FROM HOTTEST TO COOLEST
What is O, B, A, F, G, K, M
100
THE OBSERVATIONS THAT ASTRONOMERS USE TO FIND THE MASSES OF STARS
What is BY OBSERVING PERIOD AND SIZES OF ORBITS OF BINARY STARS
100
THE LEAST COMMON STARS ON THE HR DIAGRAM
What is UPPER MAIN SEQUENCE STARS
200
PARALLAX WOULD BE EASIER TO MEASURE IF THIS WERE TRUE
What is EARTH'S ORBIT WAS LARGE
200
THE ABSORPTION LINES IN THE VISIBLE PORTION OF THE SPECTRUM OF A STAR THAT ARE PRODUCED BY HYDROGEN
What is BALMER LINES
200
ON AN HR DIAGRAM THIS IS PLOTTED ON THE Y-AXIS
What is LUMINOSITY
200
ONCE YOU CALCULATE THE MASS OF THE STAR, THIS CAN BE FOUND
What is THE STAR'S DENSITY
200
STARS IN THE UPPER RIGHT AS COMPARED TO STARS IN THE MIDDLE OF THE HR DIAGRAM ARE
What is LARGER
300
THE WAY HUMANS USE THEIR EYES TO MEASURE RELATIVE DISTANCE BY PARALLAX
What is THE BRAIN INTERPRETS THE RELATIVE LOOK ANGLES OF OUR EYES IN TERMS OF DISTANCE TO THE OBJECT VIEWED
300
IF TWO STARS ARE EMITTING THE SAME AMOUNT OF LIGHT;WHICH STAR WILL APPEAR DIMMER
What is THE FARTHEST STAR
300
ON AN HR DIAGRAM THIS IS PLOTTED ON THE X-AXIS
What is TEMPERATURE
300
DOPPLER SHIFT OBSERVATIONS OF THIS TYPE OF STAR CAN ALSO HELP ASTRONOMERS THIS FOR INDIVIDUAL STARS
What is MASS
300
THE FLUX OF LIGHT REACHING YOU IS
What is INVERSELY PROPORTIONAL TO THE SQUARE OF YOUR DISTANCE FROM THE SOURCE
400
ANOTHER METHOD FOR DETERMINING DISTANCE OF A STAR
What is MOTION OF THE STARS
400
HOT STARS EMIT THIS TYPE OF LIGHT
What is ULTRAVIOLET LIGHT
400
GIANT STARS ARE LARGER IN DIAMETER THAN THE SUN AS THIS SHOWS ON THE HR DIAGRAM
What is THEY ARE MORE LUMINOUS, BUT HAVE THE SAME TEMPERATURE
400
THE MOST ACCURATE WAY TO DETERMINE SURFACE TEMPERATURE OF A STAR
What is PATTERN OF ABSORPTION LINES FORM VARIOUS ATOMS
400
THE HR DIAGRAM'S PURPOSE
What is SYSTEM FOR CLASSIFYING STELLAR SPECTRA
500
THE EARTH'S RADIUS MEASURES THIS
What is 1 AU
500
COOL STARS EMIT THIS TYPE OF LIGHT
What is INFRARED LIGHT
500
THE MOST COMMON TYPE OF STAR ACCORDING TO THE HR DIAGRAM
What is MAIN SEQUENCE
500
METHOD THAT ALLOWS ASTRONOMERS TO MEASURE THE DISTANCE OF A STAR NEAR THE SUN IN OUR GALAXY
What is PARALLAX USING EARTH'S ORBIT
500
ASTRONOMERS FOR WHOM THE HR DIAGRAM IS NAMED AFTER
Who are EJNAR HERTZSPRUNG AND NORRIS RUSSELL
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