Big Bang Overview
The formation of Simple atoms is known as what era?
Recombination
How did the Universe form?
Through the Big Bang.
How does a star become hot enough for nuclear fusion?
Through gravitational collapse.
What is the Doppler Effect?
An increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move toward (or away from) each other.
What happened before the Big Bang?
The period of rapid cosmic inflation before the Big Bang, or the idea of a "Big Bounce" from a previous contracting universe, or a "multiverse" of other universes.
What is the Big Bang Theory?
The scientific origin of the universe
If the universe is expanding, what is it expanding into?
The universe is not expanding into anything. Instead, space itself is expanding, and it is carrying the galaxies along with it.
why does a spinning nebula flatten into a disk?
Due to the conservation of angular momentum and collisions between gas particles.
How does the Doppler effect relate to sound and light.
For sound, this is experienced as a change in pitch, while for light, it is a shift in color.
What is Hubble's law?
The farther away a galaxy is, the faster it is moving away from us.
Was the Big Bang an expansion or an explosion?
Expansion.
What happened at the beginning?
Around 14 billion years ago, the universe underwent a period of rapid expansion from a very small, hot, and dense state.
why do planets simply not fall into the Sun?
Because of a balance between the Sun's gravitational pull and the planet's high tangential velocity.
What is Redshift?
The displacement of spectral lines toward longer wavelengths (the red end of the spectrum) in radiation from distant galaxies and celestial objects. This is interpreted as a Doppler shift that is proportional to the velocity of recession and thus to distance.
What is the smallest planner?
Mercury
In the Big Bang Theory, what does Cosmic Microwave Background refer to?
It’s the afterglow of the Big Bang.
As the universe expanded,_____ began to ____ together under gravity
matter, clump
What determines how a star lives and dies?
A star's mass
What is Blueshift?
The displacement of the spectrum to shorter wavelengths in the light coming from distant celestial objects moving toward the observer.
What is the biggest star?
Stephenson 2-18