Ch. 27.3 Star Groups
... One complete rotation in 200 million years.
Our sun is about 30,000 light-years from
... Keywords: red giant, supernova, white dwarf, black dwarf, fusion reactions, main sequence, neutron star
Deep Space and Solar System
... • One light year is how far light travels in one
year (based on distance NOT time)
• We see all night stars as they were when the
light we see left each star
knowledge quiz - Discovery Education
A. the star’s luminosity, or brightness
B. the star’s color
C. the star’s size
D. All of these are possible characteristics.
7. Although they did not have telescopes, ancient people studied space.
What did they observe?
A. details on planets in far-away galaxies
B. only the sun and the moon
... Objective – After watching a DVD, I can compare the distance of objects within the universe.
... a) red shiftshift- shift toward longer red
wavelengths of energy showing that an
object is moving AWAY from Earth
1) the farther away the galaxy, the
greater the red shift
2) almost all galaxies show a red shiftshiftproof that the universe is expanding
(Edwin Hubble was the first to realize this!)
Astronomy and Cosmology Exam Review
... 2) What does the red shift tell us about the motion of
the universe? It is expanding
3) What is currently the most accepted theory about
the origin of the universe called? Big Bang
4) What can I tell about a star based on its color?
What elements are present
5) What is the most common unit for measu ...
... the Big Bang theory. For example, we tend
to imagine a giant explosion. Experts
however say that there was no explosion;
there was (and continues to be) an
expansion. Rather than imagining a
balloon popping and releasing its contents,
imagine a balloon expanding: an
infinitesimally small balloon exp ...
... A. 13-15 b.y.a. the Universe came into being and began to
expand at an incredible rate (Inflation).
B. Evidence for the Big Bang: The BBT is not designed to
explain the origins of the universe only how it
1). Expanding Universe
2). Background radiation that was predicted and
PHYSICS DEPARTMENT Syllabus: Phys 200 (3 cr
... Stellar Evolution and the Death of Stars
Birth of stars. Evolution from the main-sequence to Red Giants. Testing stellar evolution using
observed star clusters. Evolution to white Dwarfs, Neutron Stars or Black Holes.
notes_chapter1 - Auburn University
... When did the expanding Universe begin?
The best answer so far? The big bang.
Explosion ~ 13.7 Ga and has been expanding ever since.
Hydrogen fused to form new light elements (He, Be, Li, B) via big bang nucleosynthesis.
The Universe continued to…
... 2. Electromagnetic spectrum and its importance in astronomy.
3. Spectroscopes and the spectrums of stars.
Include information about a spectroscope, spectrums of different gases, the Doppler Effect with
emphases on what a”red shift” is, and how Edwin Hubble used the” red shift” to determine stellar
... • Shaped like a
• “Clean” galaxies:
Very little dust and
SYLLABUS Spring 2012 SCIE 3304, SECTION 001 ASTRONOMY
... stars from birth to white dwarf, neutron stars, or black holes. Demonstrate the properties and
evolution of our galaxy, other galaxies and the entire universe. Analyze the various methods used to
measure distances out to the edges of the visible universe. Explain the experimental basis for the Big
Questions for this book (Word format)
... critical difference between having a rather low flux of neutrons, such as would
happen in the interior of an evolved star, and having a very large flux of neutrons, as
in a supernova?
... 9. Describe the Inflationary Model and draw the graph.
18. As the Earth orbits the Sun, what happens to the orientation of the
10. Match the following terms with their definitions.
___ Big Bang theory
___ steady-state theory
___ cosmic background radiation
___ inflationary universe
SNC1PL The Life Cycle of Stars
... Small sized stars also convert most of their
hydrogen fuel to helium at some point in
• Since small stars don’t have as much
mass, they do not produce the conditions
to reignite nuclear fusion.
• The hot core remains and the outer layers
simply drift away
• When the white dwarf star cool ...
Current Study Guide - Department of Physics and Astronomy
... Where are most stars found on the H-R Diagram?
Why are Stars spherical?
What is the most fundamental of all stellar properties?
A star spends most of its lifetime undergoing what process?
A pulsar is believed to be what kind of object?
Where were the heavy elements in our bodies formed?
The turn-off ...
Galaxies and the Big Bang Theory
... A ___________ is a huge group of single stars, star systems, star
clusters, dust, and gas bound together by gravity
The three different types of galaxies that exist in our universe are:
Where a limit?
... galaxies, consisting of 100 billion stars and
planets. It has the disk-shaped form and is
formed by the "threads" dispersing on a
spiral from the central congestion of
stars.ntral congestion of stars.
Our Sun – one of stars in a galaxy (star
IOSR Journal of Applied Physics (IOSR-JAP) ISSN: 2278-4861.
... began as a nebula, an area in the Milky Way Galaxy that was a swirling concentration of cold gas and dust. Due
to some perturbation, possibly from the nearby supernova this cloud of gas and dust began to condense (fig. 1),
or pull together under the force of its own gravity. Condensation was slow at ...
In physical cosmology, structure formation refers to the formation of galaxies, galaxy clusters and larger structures from small early density fluctuations. The Universe, as is now known from observations of the cosmic microwave background radiation, began in a hot, dense, nearly uniform state approximately 13.8 billion years ago. However, looking in the sky today, we see structures on all scales, from stars and planets to galaxies and, on still larger scales still, galaxy clusters and sheet-like structures of galaxies separated by enormous voids containing few galaxies. Structure formation attempts to model how these structures formed by gravitational instability of small early density ripples.The modern Lambda-CDM model is successful at predicting the observed large-scale distribution of galaxies, clusters and voids; but on the scale of individual galaxies there are many complications due to highly nonlinear processes involving baryonic physics, gas heating and cooling, star formation and feedback. Understanding the processes of galaxy formation is a major topic of modern cosmology research, both via observations such as the Hubble Ultra-Deep Field and via large computer simulations.