Stars and Constellations Flashcards
ball of plasma held together by gravity and emits electromagnetic waves
stars
stars are powered by ________
nuclear fusion reactions (nuclei from smaller atoms fuse to create heavier nuclei)
characteristics of stars (4), explain
brightness (luminosity - absolute, apparent - perceived from distance)
color and temperature (redder-cooler, blue-hotter, yellow- mid. redder- older, bluer-younger, yellow-mid)
size (based on radius)
mass (larger-shorter life span)
group of stars that form a pattern/shape and are imaginatively linked together
constellations
how many constellations are recognized by the IAU
88
IAU meaning
International Astronomy Union
explain: asterisms, circumpolar, and non-circumpolar
a : smaller patterns within a constellation
c : does not set
nc : not always visible, affected by earth’s motion
earth rotates from ________
west to east
celestial body rises in _____ and sets in _____
east, west
responsible for the different celestial bodies seen in the sky within a day
earth’s rotation
responsible for seeing different parts of the sky at different times of the year
earth’s revolution
Cassiopeia’s stars in order
caph, shedir, tsih, ruchbah, segin
cassiopeia has the pattern of ____ or ____ depending on the time of the year. what does this symbolize?
W or M, her throne
cassiopeia can be seen during _______
summer (jun-aug), autumn (sept-nov)
the shiniest star in the sky
Sirius
