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Astronomy

Astronomy Study Stack for Test

QuestionAnswer
About how old is the Universe? 12-14 billion years
What is the correct order of the planets from the Sun outward? Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, (Pluto)
How are the colors of visible light placed on the spectrum? by the wavelength of the light
What galaxy do we live in and what shape is it? Milky Way; spiral
What is a constellation? a grouping of stars
Among the Milky Way, the Sun, and Jupiter - which is the largest? Milky Way
Describe the difference between rotation and revolution. rotation is spinning on an axis; revolution is one body moving around another
Who studies the origin and dynamics of the universe? cosmologist
What creates the ocean tides? the gravity of the Sun and Moon
What are the stages of a low mass star? nebula, protostar, main sequence, giant, white dwarf, black dwarf
What is the average distance from the Earth to the Sun? 93 million miles; 1 AU
About how old is the Earth? 4.5 billion years
What is the Sun currently burning and what will it burn in the future? hydrogen; helium
Where is the asteroid belt? between Mars an Jupiter
What is a synonym for luminosity? brightness
Where do stars begin forming? in a nebula
What are the gas giants? Jupiter, Saturn, Uranus, Neptune
What is the nearest star to Earth? Sun
Which planets are covered in liquid and gas? the gas giants
What is a light-year used to measure? star to star
What does the H-R diagram show? luminosity, stages of stars, surface temperature
Why do we always see the same side of the moon? it rotates at the same rate it revolves
What is the heliocentric model? it states that the Sun is the center of the solar system
Who stated the laws of planetary motion? Kepler
What is Earth's current tilt? 23.5 degrees
What determines the eccentricity of a planet's orbit? the distance between the foci (or focal points for Connor)
What order are the energies on the spectrum and what determines where they are placed? radio waves, microwaves, infrared, visible light, ultraviolet, x-ray, gamma; wavelength
Why is Pluto so different from other planets? it has an inclination; it is highly eccentric; it is smaller than the inner planets
What is a comet? a moving body of dust and ice
What stage(s) see the start of burning helium? giant/surpergiant
What is precession? the wobble of the Earth
What relationship exists between a planet's eccentricity and its distance from the Sun? None
What is Kepler's First Law? All planets orbit in an ellipse with the Sun as one of the foci.
What is Kepler's Second Law? All planets cover equal area in equal time. (Must change speed to do this. The higher the eccentricity, the greater the change in speed.)
What is Kepler's Third Law? The time it takes a planet to complete an orbit is directly related to its distance from the Sun.
How will a change in obliquity impact the seasons? If the tilt is greater, there will be a more extreme change in seasons.
What is an AU, light-year, and parsec used to measure? AU=planet to planet; light-year=star to star; parsec=galaxy to galaxy
What part of the spectrum can humans see? visible light = ROY G BIV
What type of energy is radio waves? - gamma? radio waves are very low energy (harmless); gamma is very high energy (harmful)
What will be the end of the road for our star? black dwarf
Created by: shelly_spangler