Big Bang Theory?
All of observable matter, energy, space and time was concentrated in one point.
Age of Universe?
13.7 billion yrs old
Center of the Universe?
There is no center because all positions are equivalent.
Red Shift?
Stars and galaxies moving away from us.
Expansion of space?
The further a galaxy is, the faster it is moving away from us.
CMB?
Temperature or energy left over from the Big Bang.
Expansion of space and raisin bread?
The galaxies (raisins) stay the same, space (dough) expands.
Fate of our Universe?
It will expand forever.
Dark Matter?
25%
Dark Energy?
70%
Light travel in miles per second?
186,000mps
Who first proved that galaxies are located outside our own galaxy?
Edwin Hubble.
What 3 galactic types make up the Hubble classification of galaxies?
Elliptical, Spiral, Irregular.
Relative location of the older and younger stars in typical spiral galaxies?
Old: central region. Young: spiral arms.
Are collisions of galaxies rare?
Fairly uncommon.
Galaxy cluster?
large gravitational bound structure formed by a collection of hundreds to thousands of galaxies.
Einstein cross?
Galactic phenomena of a single distant galaxy appearing to be multiple galaxies because of the frontal galaxy’s gravity bonding light.
What makes up our largest structure in the universe?
Empty space
Nebula?
Gas and dust collected in glaxies.
Our home galaxy?
Milky Way
How long does it take for our solar system to make one orbit around our galaxy?
250 millions yrs
Our galaxy is what type of galaxy?
Barred-Spiral galaxy.
Globular clusters?
Vast collection of stars.
Magellanic Clouds?
Found in Southern Hemisphere and 2 dwarf irregular galaxies.
Andromeda galaxy and its possible consequences to ours?
It is moving toward the Milky Way at 300,000mph and will eventually reach us in 5 billion years.
Planetesimals?
Innumerable small bodies that orbit a star.
Which direction do our planets orbit the sun?
counter-clockwise
Apprx diameter of Sun?
865,000miles
The Sun is?
Average Yellow Star
Two types of super-giant stars?
Blue Super Giant and Red-Super Giant
What is the fate of the Sun?
Red Giant.
What if the Sun was 4x bigger?
Explosion in a supernova. Become a neutron star or a black hole.
Locate exoplanets?
Star Wobbles
Planets starting from the Sun?
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
Mass of Jupiter to other planets?
11x that of the Earth
Most moons are composed of what?
Water and some methane
Where are most asteroids located in our Solar System?
Between mars and Jupiter
Which asteroid did the US land on?
Eros
3 types of meterorites?
Stony. Iron. Stony Iron
Oort Cloud?
Spherical cloud of ice, gas, dust and rocks. In our solar system.
Kuiper Belt?
Disk shaped, ice, gas, dust and rocks. Orbits Neptune
Causes of meteor showers and shooting stars?
debris left in comet orbits.
Origin of our moon today?
Space debris
Moons sized compared to Earth?
1/4 of Earth
When does the far side of the moon face Earth?
Never.