UNIVERSE and THE SOLAR SYSTEM Flashcards
observed that all galaxies were
moving away from one another
Edwin Hubble
Calculating back from the galaxies, we get starting point in time of _____ bya
13.7
MAIN OBJECTS IN THE UNIVERSE (3)
- stars
- stellar systems
- galaxy
massive self-luminous celestial body of gas that shines by radiation derived from its internal energy
stars
a star and other objects such as planets
and/or other stars and other materials that orbit it.
solar systems
any of the systems of stars and interstellar matter that make up the universe
galaxy
3 types of galaxies:
- spiral galaxy
- elliptical galaxy
- irregular galaxy
Compact group of galaxies in constellation pegasus
Stephans Quintet
Unis, Versus, Universum, Universus - origin of the word ______?
Universe
greek word of cosmos
kosmos
characteristics of the universe
Harmonious, Orderly, Systematic
this theory of Einstein helped us to understand gravity
Theory of Relativity
This is a hot, infinitely dense ball that exploded, resulting in the formation of our universe
singularity
The most widely accepted explanation on how the universe began.
big bang theory
the 2 eras/major events in the big bang theory
Radiation and Matter era
Epochs under Radiation Era (8)
- Planck Epoch
- Grand Unification Epoch
- Inflationary Epoch
- Electroweak Epoch
- Quarks Epoch
- Hadron Epoch
- Lepton Epoch
- Nuclear Epoch
No matter, just energy and the 4 super forces of nature were complete. However, this era ended when gravity split away.
Planck Epoch
the name for the 3 remaining super forces. This epoch ended when strong nuclear split away from the superforce
Grand Unification Epoch
the universe expanded exponentially fast during this time. From the size of an atom to a size of a grapefruit. Also, the universe churned with Electrons, Quarks, and other particles. the
Inflationary Epoch
the electromagnetic force separated from the weak nuclear force
Electroweak Epoch
