Definitions Flashcards
(15 cards)
Star
A large, glowing ball of gas that generates heat and light through nuclear function
Not burning
Luminosity - energy per second
It is glowing because it is luminous
The Fire Triangle/ The three components for fire to burn
Heat, Fuel, Oxegyn
There’s no oxegyn in space. It’s not burning. The sun is not burning.
Deprive oxegyn and fire
Plants supply oxegyn it’s mostly plants
Photosynthesis is absoring light rays
If you ran into a star you would be burned lol
500,800 degrees celcius is the sun
Some pathces are 4000
Old school light bulb that get hot
Effilimate 3,000 degrees calc
A million c degrees around the sun so the surface isn’t as hot but yeah
GLowing is hte same as stovetop or a toasting. theyre still hot and you would burn but they are not burning. Glowing does
Black body radiation
Thermal radiation
Sun is whitishred
Some stars red some blue
Radiatino curve you see that when you experience heat from something that is not
Toasting emmiting energy while it heats up
Take a toaster in soace and it will work just find bc it doesnt require oegryn
Solarflares are justoutbursts of
15 million k in the center of the sun
Nuclear Fusion
Fision is splitting
Fusion is putting together
(Soothing, confusing, loosing, choosing, amusing,
Planet
A moderately large objectthat orbits a star; it shines by relected light. Planets may be rocky, ict, or gaseous in composition.
We see planets because they reflect the sun
Like us
We do not radiate light
We raidate enrgy but not in the spectrum that we view everyday
Like heat goggles we would see
But with our vision we only see eachother because we reflect light around us
Rocky planets are closer to the sun but there are exceptions
Solar… theory
Hot jupiters are like jupiters much closerto the sun than naturally exepcted
Moon (or Satellite)
An object that
Ganymede is larger than Jupiter (I think) but it is its moon because it orbits around it.
Planet orbits star and moon orbits planet
Natural satelite
Asteroid
A relatively small and rocky objevt that orbits a star
Comet
A relatively small and icy object that orbits a star.
Solar (Star) System
A star and all the materials…
Galaxy
A great island of stars in space, all held together by gravity nd orbiting a common center
100 billion 400 billion {200 billion}
Hundreds of billions
That cetner is
Universe
14 billion lightyears universe
Astronomical Unit (AU)
Average distance between the Earth and the Sun (150 million kilometers = 93 million miles)
Light-year (ly)
- The distant that light can travel in 1 year
- A distance measurement, not a time measurement
- About 10 trillion
30,000 milometers per second
…….meters per second
670 millin miles per hour
1 light-year = (speed of light) x (1 year)
S = D/T
S= speed of light
D=distance
T=time
Velocity a=or speed is equal to distance divided by time
Miles divded by 1 hour is miles per hour
Distance divided by time is equal to speed
10 trillion kilometers is the distance of a lightyear
30 thousand kilometers per second
1 year
Time
9 and a half times around the Earth is the distance of the sun
1 and a half seconds to travel that far
Delay of talking to someone in another country
Communications travels at the speed of light’
IM NOT EVEN IN THE PRESENT W YOU
The moon takes a bit over 1 second to reach us. Because light travels at a finite speed
The light being emmitted in the sun takes 8 minutes to reach us
Almost as if you’re seeing a recording of the past
Photons on light
The photon is the car it takes a while for the car to drive
8 lightyears away that means it would take 8 years for time to reach us. Sirius is 8 light years away. The Andromeda Galaxy it takes 2.5 million years that’s crazy. We look at a star and it might not actually be there.
66 million lightyears away. If you were on another planet that far away and you look at Earth you wouldn’t see humans you would see dinosaurs.
13.8 billion that’s when the first light emerged so we can only observe that much the universe in the past
12 billion light years looking at the galaxy looking 12 billion years ago
If the universe started 14 billion years ago
2 million years after the big bang
Observiable universe is not the universe itself
Two galaxies a billion light years apart. One will see more one direction and less the other direction same with the other galaxy.
How Big Is the Universe?
…
How Did We Come To Be?
Most of the material we have in our universal is originated form a star
You’re a star fr. Oxegyn and iron had to have come from a star at one point
We are made from stars at some point.
Movement
700 miles per hour we are moving
660 miles per hour when you go to the equator close to 1000 miles per hour
Rotation vs REvolution
Revolution going around the point outside of itself (the sun)
Rotation revolving around a point within. Like an axis.
