Lecture 2 Flashcards
1
Q
What is dark matter?
A
It is not like normal matter and it is not detectable. It could be formed from axions or WIMPS.
2
Q
What is baryonic matter?
A
Normal matter- protons, neutrons etc.
3
Q
What is dark energy?
A
Accounts for most of the universe’s makeup and is theorised to be the reason for the universe’s expansion.
4
Q
What is the current model of the evolution of the universe?
A
The accelerating universe model
5
Q
How did dark matter evolve in the universe?
A
Denser regions collapsed under gravity (dominated by dark matter).
6
Q
How do stars evolve?
A
Stars form in the densest regions from clouds of dust gas molecules. After their death, their elements are recycled into the interstellar medium.
7
Q
What are the 6 different motions?
A
- The rotation of the Earth
- The Earth orbiting the sun
- The sun moving with respect to the local stars
- Our motion around the galaxy
- The motion of the Milky Way in the Local Group
- The Local Group moving towards the Virgo Cluster
