Unit 9 Flashcards
The ________ star is extremely luminous and emits a lot of energy in a short amount of time.
Quasar
When infinite gravitation and density is all bunched together at one point, it is a phenomenon called ________.
singularity
In a(n) _________, electrons are cramped and can’t circulate freely.
white dwarf
If _____________ exists, it constitutes 90% of all existence.
dark matter
When their fuel source runs out, quasars become ____________.
ordinary galaxies
A(n) ___________ stretches across the entire cosmos in chains and sheets of clusters that are linked by gravity at their edges.
supercluster
A(n) _____ shift occurs when a light source, such as a star or quasar, recedes from an observer at a significant percentage of light speed.
red
____________ are in a state of existence where physical laws do not apply and they are a mystery because they are unobservable from the outside.
Black holes
Shrinkage to the point where electrons merge with protons and there is no empty space characteristics of a(n) _________.
neutron star
All _____________ are powered by _______ falling into black holes.
active galaxies, matter
As extreme conditions in the cores of dying stars alter ordinary matter it forms ______________.
degenerate matter
____________ are detected by ________ when nuclei are broken apart.
singularities, x-rays
The greater an object’s distance, the greater the ____________ speed.
recession
Light from a(n) _______________ comes from its exceptionally bright nucleus, within which large amounts of very ionized gas surges.
seyfert galaxy
Unexpectedly high rotation speeds indicate that regions that contain longer orbits enclose more ________.
mass
Our Local Group is moving toward a supercluster known as the ________________.
great attractor
__________________ occur(s) when electrons from ionized matter spiral around magnetic lines of force that surround a black hole.
synchrotron radiation
____________ is the act of growing by being added to.
accretion
______________ is a(n) spiral-shaped ____________ moving through the galactic disk.
density wave, disturbance
Dust must be considered when estimating __________ in space.
distance
Spiral galaxies are classified by what?
the degree of openness of the arms and size of the nuclei
What is it called when the universe is seen as an orderly system?
cosmos
The void between chains and clusters are called _________.
“bubbles”
What reveals itself with the presence of very hot, rapidly moving, low-density gas in the galaxy’s halo?
dark matter
