Lesson 11-
Big Bang Theory
Big Bang Theory
Lesson 12
Evidence of Big Bang
Evidence of Big Bang
Lesson 13
Galaxies
Galaxies
Lesson 14
Formation of Universe
Formation of Universe
Milky Way Medley
100
How long ago did the Big Bang take place?
13.7-13.8 billion years ago
100
What is the name of the Belgian priest who first proposed the idea of the Big Bang? (FIRST AND LAST NAME)
Georges Lemaitre
100
List the 4 different types of galaxies.
Spiral
Lenticular
Elliptical
Irregular
100
Define nebula.
A cloud of gas and dust in space
100
I shine not with light but with gravity’s might,
A black hole that swallows all in its sight.
At the heart of the Milky Way, hidden from play,
My name is a sign in the zodiac’s way.
A letter follows—what is my name?
Sagittarius A*
200
What does "singularity" mean in the context of the Big Bang?
The universe began from an initial point (or singularity) which has expanded over billions of years to form the universe as we now know it today.
200
What is redshift?
The stretching of light from a source moving away from the observer, resulting in the spectral lines shifted toward the red end of the spectrum
200
Define galactic year.
The time required for the Sun to orbit once around the center of the Milky Way
200
What is nuclear Fusion?
In stars, atoms of light elements combine to form a heavier atom.
200
I have no set shape, I break the mold,
With gas and dust, my story unfolds.
My stars are young, they brightly gleam,
More than millions, a cosmic dream.
Unlike spirals or clusters tight,
What kind of galaxy am I, just right?
Irregular
300
What happened 1 second after the Big Bang?
Protons and neutrons began to form
300
Which astronomer used the Doppler effect to propose that the universe is expanding?
Edwin Hubble
300
The core of this galaxy is made of old stars and the arms contain the younger stars. These are the brightest galaxies in the universe. The Milky Way is an example.
Spiral
300
How long ago was our solar system formed?
4.6 billion years ago
300
I stretch and grow, yet stay unseen,A cosmic dance where red is keen.Galaxies drift, away they fly,
A clue found shining in the sky.
This motion shows, as we rewind,
A fiery start—our past aligned.
What am I, a sign so vast,
Of the Big Bang’s explosive past?
Expanding universe
400
What happened 380,000 years after the Big Bang?
The temperature dropped allowing electrons to combine with hydrogen and helium nuclei to form neutral atoms. (Recombination).
This made the universe transparent to light, releasing the Cosmic Microwave Background (CMB) radiation.(Either answer ok)
400
Explain what is happening in this picture. 
Stars are moving away from Earth and their light becomes dimmer. This is called the red shift.
If stars move toward Earth, we see a blue shift – light becomes brighter.
400
This type of galaxy is round or oval shaped. They are older with very little gas, dust or young stars. They are not as bright as a spiral galaxy.
Elliptical
400
What percentage of the total mass of the solar system does the Sun make up?
99.8%
400
In the cosmic past, so young and bright,
Stars grouped together, forming light.
Gravity pulled, the dance began,
Galaxies rose from dust and span.
Not at the start, but not too late,
Between two numbers, mark this date.
What time am I, when stars took flight,
And galaxies formed in the cosmic night?
500 million to 1 billion years after the big bang
500
How many years after the Big Bang did the first stars begin to form?
100-200 million years
500
What is Cosmic Microwave Background?
Leftover radiation from the Big Bang
500
This type of galaxy has have a central bulge surrounded by a flat disk of gas and dust but has no spiral arms.
These are thought to be spiral galaxies that have lost their gas and dust, and so are also made up of older stars.
Lenticular
500
List the steps of how our sun formed. (output)
1. Nebula/cloud of dust and gas
2. Collapse of cloud
3. Formation of spinning disk
4. Nuclear fusion at center
5. Sun formed and pulled in 99.8% of matter
6. Formation of other planets - rocky and then gas
500
I am a pattern, bright or dark,
A fingerprint, a glowing mark.
Each element has its own design,
A cosmic code in every line.
Through prisms bent, I tell the tale,
What am I, that never fails?
Spectral lines