Exam One Flashcards
(44 cards)
What are the coordinates we use for the local sky
Altitude and Azimuth
How does the sun rise
East to West, due North in summer and due South in Winter
What is our cosmic address
Milky Way, Earth
What is Emission
A thin, low-density cloud of gas that emits light only at specific wavelength that depends on composition and temperature
What is Absorption
A cloud of gas between us and a light bulb that can absorb light of specific wavelengths, leaving dark absorption lines
What is Angular Size
How we measure the sky and we estimate with our outstretched hands
What speed does light travel
Light travels at a finite speed of 300,000 km/s
How do the stars rise and set
The Earth rotates West to East, so the stars rise in the East and set and the West
What is the Doppler Shift
Light emitted from an object moving towards you will have it’s wavelength shortened
How do Astronomers use the Doppler Shift
Astronomers use the Doppler Shift to tell what part of an object’s motion is moving towards or away from us
What is the REDSHIFT
Light emitted from an object moving perpendicular to your line of sight
What is BLUESHIFT
Light emitted from an object moving away from you
Types of Energy
Kinetic, Radiative, Stored, Potential, Total, Thermal, Concentrated, Orbital, Photon, Gravitational
What is a Light Year
The distance a light can travel in one year (6 trillion miles)
Types of Spectra
Emission, Continuous, Absorption
How do Astronomers use Spectra
To tell which kinds of atoms present
What is Accelerated Motion
A point or an object moving in a straight line is accelerated if it speeds up or slows down
What is the relationship between Temperature and Color
The hotter the temperatures, the more red/white an object becomes. (Red=Hot, Bright Red= Hotter, White/Glowing= Hottest)
What is the difference between the Heliocentric Model and the Geocentric Model
Heliocentric=Sun at the center
Geocentric=Earth at the center
What does an Astronomical Unit (AU) represent
The average distances from the Earth to the Sun
Types of Forces
Gravity, Normal Force, Electricity, Nuclear, Spring, Tension, Magnetic, Contact, Drag, Friction, Electromagnetism, Air Resistance, Centripetal, Electrostatics
Types of Electromagnetic Spectrums
Radio Waves, Microwaves, Infrared, Visible Light, Ultraviolet, X-Rays, Gamma Rays
Types of Orbits
Geostationary, Geosynchronous, Geocentric, Geostationary Transfer, Geosynchronous Earth, Earth, Medium Earth, High Earth, Low Earth, Polar, Near-Equatorial, Sun-Synchronous, Elliptic, Inclined, Circular, Horseshoe, Graveyard
The Longer the Wavelength
The Less Energy It Has
