27 And 29 Flashcards
Star
A body of gases that gives off tremendous amounts of radiant energy
Spectrometer
A decide that separates light into different colors or wavelengths
Spectrum
The display of lights and colors that a spectrometer emits
What is the sun’s size
Medium size
Star life cycle
Nebula, protostar, main sequence, red giant, supernova, and planetary nebula
Dark line spectra
Used to reveal certain characteristics of stars such as composition and temp
Blue stars are normally _____ c°
35,000-50,000
Red stars are normal _____c°
3000c°
Yellow stars
5,500c°
Actual motion
The way a star actually moves
Apparent Motion
How much a star visible moves to eyes on earth, due to the movement of the earth.
Most stars are moving
Westward or around Polaris
Circumpolar stars
Stars rotating around polaris
Parallax
To determine the distance between stars and earth
Nebula
Gas cloud
Protostar
Nebula material shrinking and flattening into a disk
Quasars
First objects In universe give off radio signals seem to have evolved into galaxies
MVEMJSUN
Yes
Claudius Ptolemy
Geocentric model two types of motion
Copernicus
Heliocentric.
Keplers
Laws
Inspired by Brahes observations, law of ellipses, law of equal areas, law of periods (orbit period determined by distance from the sun)
Inertia
Thing goes at contestant speed until acted upon and outside force
Mercury
Terrestrial, closeness to the sun and tiny size makes it have very thin atmosphere, rotates very slowly on axis, short orbit period 88 days
Venus
Orbit period is longer than rotation period, earths twin, carbon dioxide atmosphere very hot,
Mars
Two moons, smaller than earth, volcanoes, ice caps, canyons, erosion
