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What are the five major characteristics of Stars?
Color, Temperature, Size, Brightness, and Composition
Give at least three constellations that can be seen in the Northern Hemisphere?
Ursa Major, Ursa Minor, Cassiopeia, and Cygnus
Give at least three constellations that can be seen in the Southern Hemisphere?
Southern Cross, Carina, and Centaurus
He devised a scale of 1 to6 to describe the apparent magnitude of a star
Hipparchus
What are the two factors that affect the brightness of a star?
Size and Distance from Earth
It is the brightness measured at actual distance from the Earth
Apparent Magnitude
What is absolute magnitude?
Brightness measured at 10 parsecs from the Earth
It is considered as the brightest star in the night sky with an absolute magnitude of 1.4
Sirius
What is the top 1 brightest star as seen from Earth?
SUN
It describes the rate at which a star radiates energy
LUMINOSITY
What factors affect the luminosity of a star?
Size and Surface temperature
How does the color of a star relate to its temperature?
Cooler stars appear reddish while hotter stars appear bluish
Why do hottest stars appear bluish to white?
Because they emit their energy in the blue to UV wavelengths
What is the function of a Stellar Spectra?
It contains the information about the star's temperature, chemical composition, and intrinsic luminosity
What is the temperature range and color of a type O star?
Bluish in color, 30,000 to 80,000 k temperature
What are the three major classifications of stars according to size?
Dwarf, Giant, and Super giant
