When stars are being born out of the collapsing nebula material they do not form alone, 2 or more stars will form at the same system.
What is a binary system.
100
MACHO stand for what?
What is Massive Compact Halo Objects.
100
All galaxies are divided into 3 main categories, what are they.
What are Spirals/Barred Spirals, Elliptcals, and Irregulars
100
Billions of years ago our universe expanded rapidly from an infinitely hot dense state and it has been evolving since.
What is the Big Bang
100
There are 2 majors Era's; what are they?
What is Radiation and Matter
200
These occur when the stars are not too close together. Each star has region of gravitational influence around itself.
What is Detached Binary System.
200
What does WIMP stand for?
What is Weakly Interacting Massive Particles.
200
These have a galactic core surrounded by a disk of swirling arms of gas and dust.
What is Spirals and Barred Spirals
200
This model says the universe will expand indefinitely.
What is Open Universe
200
How many different Epochs in each era.
What is 8 total; 5 in the radiation and 3 in the matter era.
300
This system occurs when a regular star begins sucking material off a companion star. The regular star can suck so much material it can actually cause the regular star to bump a stellar class.
What is Semi-detached Binary System
300
MACHOS believed to be what.
What is brown dwarfs that don't produce enough light to see them.
300
These are similar to spirals, expect without the galactic disk. They can be broken down even further into 10 subcategories based on how close they were to perfect circles.
What is Elliptical.
300
This model predicts a continuing but slowing expansion that approaches zero as time approaches infinity.
What is Flat Universe
300
Prior to this time period, the universe was still too hot for nuclei to form, at about 1,000 minutes after the universe cooled enough for nuclei to form.
What is Nuclear Epoch
400
This system is when 2 stars are so close to each other that they share all of their outer layers. Essentially they become one star with 2 cores.
What is Contact Binary System.
400
WIMPS are defined as what..
What is less massive particle that only interact with other matter through the weak nuclear force
400
These compose everything else. There are 2 subcategories, I & II, where the I's look like misshapen spirals and the II's are everything else.
What are Irregular.
400
Gravity will halt the expansion and force a collapse called the Big Crunch. As if contracts, galaxies will fall back inward on one another until all mater is once again crunched into an extremely hot dense state.
What is Closed Universe
400
What is the final epoch that is currently being studied.
What is Stellar Epoch
500
The bigger the stars mass the bigger this part of the binary system will be?
What is Roche Lobes
500
Astronomers do not know exactly what dark matter is, but there are 2 main candidates.
What is WIMPS and MACHOS
500
Spirals and Barred Spirals are different how?
What is Barred Spirals have what appears as bars that extend from the galactic disk where the gas and dust spiral from.
500
This model says that after the Big Crunch, another Big Bang will occur.
What is Oscillation Universe
500
The concentration of Hydrogen and Helium is still the same today as it was when the universe was formed, what is that concentration .