Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
41 Cards in this Set
- Front
- Back
electromagnetic radiation
|
Light
|
|
electromagnetic specturm and its parts
|
radio, infrared, visible, ultraviolet, x-ray, gamma ray
|
|
electrons, protons, and neutrons
|
Parts of an atom
|
|
emmision specturm
|
gives off light occurs at the same frequency
|
|
absorption spectrum
|
absorbs light
|
|
blackbody radiation
|
absorbs all frequencies of light
|
|
Room temperature in Kelvin
|
300K
|
|
Doppler effect
|
the frequency of light can be shifted if the source is moving toward(Blue) or away(Red) from us
|
|
Hubble's Law
|
Farther away a galaxy is the faster it is moving away from us
|
|
THe steady State Model
|
THe model befor the Big Bang Model (thought the universe was in a steady state)
|
|
Big Bang
|
the beginning of the expansion of space
|
|
Cosmic Microwave Background
|
Microwaves who have traveled millions of years ago
|
|
Cosmological constant or dark energy
|
expansion of the universe is excelling!(getting faster)
|
|
What observations is Galileo famous for?
|
4 moons of jupiter, sunspots, phases of venus, mountain on the moons
|
|
What is Tycho Brahe famous for?
|
detailed measurements of stars and planets with out a telescope
|
|
What is Johnnes Depler famous for?
|
3 laws of motion
|
|
what is issac newton famous for (the 3 reasons we discussed in class)
|
1.developed laws of motion and gravity
2.reflection telescope 3.descovered spectrum of light |
|
why were newtons laws of motion and law of gravity so important to astronomers?
|
measure the solar system(mass of everything)
|
|
what did edmund halley observe
|
halley's comet
|
|
what are cassini and huygens (the astronomers) famous for
|
observaions of saturns rings and moons
|
|
what is herschel famous for
|
discovered uranus, bionary stars, 1st to map our galaxy(milky way)
|
|
was is bessel famous for
|
1st measured distance from a star
|
|
What is the relation between the frequency of light and its energy
|
high frequency > higher the energy
|
|
how or why is a spectral emission or absorption line made?
|
"Steps"
|
|
what do astronomers learn from emission or absorption spectra?
|
elements
|
|
what do astronomers learn from a blackbody spectrum
|
temp of object
|
|
what does it mean for an object to have a red or a blue shifted spectrum
|
away(Red) toward(Blue)
|
|
What was different about the discovery of neptune, and who discovered it?
|
Uranus had something disturbing its rotaion,adams, leber
|
|
What was slipher famous for
|
Most galaxies have a red shift
|
|
What was edwin hubble famous for?
|
law, farther the faster, measuring distance ot another galaxy
|
|
since all galaxies are moving away from us, are wwe at the center of the universe?Explain
|
No. all points are moving away from each other
|
|
what are the four reasons why we believe the big bang model
|
1. red shift
2. cosmic micro 3. Neucleosynthesis 4. large scale structure |
|
what is the current temperature of the universe, and how is it measured
|
13.7 by ?
|
|
what happened during the period of nucleosynthesis during the big bang
|
it is cool enought for nuclei to stay bound together
|
|
what was the universe made of 15 minutes after the big bang
|
protons and neutrons
|
|
why is our sun not a first generation star
|
stars were bigger, and made of different things
|
|
when was the big bang
|
13.7 billion years ago
|
|
what is the difference between the radiation dominance era and the matter dominance era of the universe
|
more energy is in matter than radiation (universe is matter dominated)
|
|
when was the cosmic microwave background made?
|
379,000 my
|
|
when did the first stars form, and what was special about them
|
300 million years, 100-1000 times our sun
|
|
what will happen to the universe in the future
|
the sun toasts the earth, the universe is very hot
|