File
... spirals, but with the presence of a bar in the central regions. E = elliptical galaxies -- galaxies with smooth light distributions, biaxial profiles. Round to oval in shape. Irr = irregular galaxies -- galaxies that did not have the regular structure of the above groups Cause of Galaxy Types ...
... spirals, but with the presence of a bar in the central regions. E = elliptical galaxies -- galaxies with smooth light distributions, biaxial profiles. Round to oval in shape. Irr = irregular galaxies -- galaxies that did not have the regular structure of the above groups Cause of Galaxy Types ...
Big Bang and Life Cycle of Stars
... incredibly hot dense region, a form of matter called plasma. • At a super heated state, it was too hot for atoms to form, or other properties such as gravity or electromagnetic forces to occur • And then, Billions of years ago all at once, rapid expansion, and an enormous explosion!!!!! • Big Bang T ...
... incredibly hot dense region, a form of matter called plasma. • At a super heated state, it was too hot for atoms to form, or other properties such as gravity or electromagnetic forces to occur • And then, Billions of years ago all at once, rapid expansion, and an enormous explosion!!!!! • Big Bang T ...
May 2015
... Blue Skies and Red Sunsets – Our atmosphere is a mixture of mostly Nitrogen and Oxygen gas molecules, water vapor, and lots and lots of dust. On a clear cloudless day the sky appears blue because the dust particles in the air have a tendency to scatter the sun’s shorter wavelength blue light more th ...
... Blue Skies and Red Sunsets – Our atmosphere is a mixture of mostly Nitrogen and Oxygen gas molecules, water vapor, and lots and lots of dust. On a clear cloudless day the sky appears blue because the dust particles in the air have a tendency to scatter the sun’s shorter wavelength blue light more th ...
Link again
... The universe seems to be undergoing evolution. It seems to be expanding. Star formation seems to be slowing down because the interaction of galaxies is slowing down. Stars themselves undergo evolution as the form from collapsing clouds of hydrogen thus undergoes nuclear fusion once it reaches and ap ...
... The universe seems to be undergoing evolution. It seems to be expanding. Star formation seems to be slowing down because the interaction of galaxies is slowing down. Stars themselves undergo evolution as the form from collapsing clouds of hydrogen thus undergoes nuclear fusion once it reaches and ap ...
Astronomy
... The universe seems to be undergoing evolution. It seems to be expanding. Star formation seems to be slowing down because the interaction of galaxies is slowing down. Stars themselves undergo evolution as the form from collapsing clouds of hydrogen thus undergoes nuclear fusion once it reaches and ap ...
... The universe seems to be undergoing evolution. It seems to be expanding. Star formation seems to be slowing down because the interaction of galaxies is slowing down. Stars themselves undergo evolution as the form from collapsing clouds of hydrogen thus undergoes nuclear fusion once it reaches and ap ...
Article: How Big is our Universe
... our star and its planets are just one small part of the Milky Way galaxy. The Milky Way is a huge city of stars, so big that even at the speed of light, it would take 100,000 years to travel across it. All the stars in the night sky, including our Sun, are just some of the residents of this galaxy, ...
... our star and its planets are just one small part of the Milky Way galaxy. The Milky Way is a huge city of stars, so big that even at the speed of light, it would take 100,000 years to travel across it. All the stars in the night sky, including our Sun, are just some of the residents of this galaxy, ...
Chapter 18 Notes - Valdosta State University
... Most galaxies are thought to have a super massive black hole at the center. That would explain the high velocities of stars orbiting near the center, the tremendous energy generated by the core and the shape of most galaxies. The most distant objects detected in the universe are called quasars (qua ...
... Most galaxies are thought to have a super massive black hole at the center. That would explain the high velocities of stars orbiting near the center, the tremendous energy generated by the core and the shape of most galaxies. The most distant objects detected in the universe are called quasars (qua ...
Earth_Universe04
... Accounts for galaxies moving away from us Universe was once confined to a "ball" that was • Supermassive • Dense • Hot ...
... Accounts for galaxies moving away from us Universe was once confined to a "ball" that was • Supermassive • Dense • Hot ...
Astrophysics E1. This question is about stars.
... temperature of the universe immediately after the Big Bang was very high; as it expanded it cooled down; the wavelength of the CMB corresponds to a temperature consistent with ...
... temperature of the universe immediately after the Big Bang was very high; as it expanded it cooled down; the wavelength of the CMB corresponds to a temperature consistent with ...
5X_Measuring_galaxy_redshifts
... magnetic buttons (with miniature prisms). A robot sets up the field beforehand by drawing out each fibre from its storage and placing the button on a metal plate exactly where the light of a particular galaxy will fall. One field can be set up whilst another is being observed. ...
... magnetic buttons (with miniature prisms). A robot sets up the field beforehand by drawing out each fibre from its storage and placing the button on a metal plate exactly where the light of a particular galaxy will fall. One field can be set up whilst another is being observed. ...
Origin of stars
... “The stars of our own galaxy, the Milky Way, rotate about the galactic center with different speeds, the inner ones rotating faster than the outer ones. The observed rotation speeds are so fast that if our galaxy were more than a few hundred million years old, it would be a featureless disc of stars ...
... “The stars of our own galaxy, the Milky Way, rotate about the galactic center with different speeds, the inner ones rotating faster than the outer ones. The observed rotation speeds are so fast that if our galaxy were more than a few hundred million years old, it would be a featureless disc of stars ...
Lecture Notes – Galaxies
... Thus for a z = 4.0 quasar, the Lyman-α line of hydrogen will be redshifted from 121.5 nm to 607.5 nm; its recession velocity is 0.923c and its distance is 2 880 Mpc (H=50 km/s Mpc−1 ). Quasars are variable on time-scales of days to months which indicates that they are very small ( < 1 light month or ...
... Thus for a z = 4.0 quasar, the Lyman-α line of hydrogen will be redshifted from 121.5 nm to 607.5 nm; its recession velocity is 0.923c and its distance is 2 880 Mpc (H=50 km/s Mpc−1 ). Quasars are variable on time-scales of days to months which indicates that they are very small ( < 1 light month or ...
Our Galaxy, the Milky Way Galaxy
... Theoretical Galactic Dynamists – Write computer simulations to show how a galaxy chnages o Most powerful computers can only do simulations with millions of stars We don’t know why galaxies have arms (the computer simulations tell us this) Observational Galactic Dynamists – Take photographs of galaxi ...
... Theoretical Galactic Dynamists – Write computer simulations to show how a galaxy chnages o Most powerful computers can only do simulations with millions of stars We don’t know why galaxies have arms (the computer simulations tell us this) Observational Galactic Dynamists – Take photographs of galaxi ...
Standard EPS Shell Presentation
... Identify the conditions necessary for fusion to occur inside a star. Describe the information that spectroscopy provides about stars. Relate the color of a star to its temperature. Explain the factors that determine the brightness of a star in the sky. Discuss the importance of the H-R diagram to as ...
... Identify the conditions necessary for fusion to occur inside a star. Describe the information that spectroscopy provides about stars. Relate the color of a star to its temperature. Explain the factors that determine the brightness of a star in the sky. Discuss the importance of the H-R diagram to as ...
The Scales of Things
... A certain absorption line that is found at 5000Å in the lab is found at 5050Å when analyzing the spectrum of a particular galaxy. We then conclude that this galaxy is moving with a velocity v = (50/5000) * c = 3000 km/sec away from us. Putting it altogether now, if the object is moving away from us ...
... A certain absorption line that is found at 5000Å in the lab is found at 5050Å when analyzing the spectrum of a particular galaxy. We then conclude that this galaxy is moving with a velocity v = (50/5000) * c = 3000 km/sec away from us. Putting it altogether now, if the object is moving away from us ...
computational astrophysics (@ Uchicago) in 2042
... galaxy clusters in terms of both physical modeling as well as the spatial and mass resolution, which should enable us to study the distributions of dark matter, gas, and stars in clusters on scales less than 1kpc. This will enable us to study evolution of galaxies in clusters as well as interactions ...
... galaxy clusters in terms of both physical modeling as well as the spatial and mass resolution, which should enable us to study the distributions of dark matter, gas, and stars in clusters on scales less than 1kpc. This will enable us to study evolution of galaxies in clusters as well as interactions ...
What have we learned?
... • How were neutron stars discovered? – Beams of radiation from a rotating neutron star sweep through space like lighthouse ...
... • How were neutron stars discovered? – Beams of radiation from a rotating neutron star sweep through space like lighthouse ...
Multiple Choice, continued
... • The galaxy in which we live, the Milky Way, is a spiral galaxy in which the sun is one of hundreds of billions of stars. • Two irregular galaxies, the Large Magellanic Cloud and Small Magellanic Cloud, are our closest neighbors. • These three galaxies are called the Local Group. ...
... • The galaxy in which we live, the Milky Way, is a spiral galaxy in which the sun is one of hundreds of billions of stars. • Two irregular galaxies, the Large Magellanic Cloud and Small Magellanic Cloud, are our closest neighbors. • These three galaxies are called the Local Group. ...
Gilmore
... Apparently dark-matter dominated ~ 10km/s, 10 < M/L < 100 Metal-poor, all contain very old stars; but ...
... Apparently dark-matter dominated ~ 10km/s, 10 < M/L < 100 Metal-poor, all contain very old stars; but ...
Galaxies
... This is M31, the Andromeda galaxy. The light has taken 2.2 million years to get to us and is 200,000 light years across! It was named ‘little cloud’ by the Persian astronomer Abdal-Rahman-al-Sufi in 964 AD and is one of the local group of galaxies. ...
... This is M31, the Andromeda galaxy. The light has taken 2.2 million years to get to us and is 200,000 light years across! It was named ‘little cloud’ by the Persian astronomer Abdal-Rahman-al-Sufi in 964 AD and is one of the local group of galaxies. ...
Long Ago and Far Away
... For students with a knowledge of trig, another way to approach the problem is to note that the sine of an angle equals the side opposite the angle divided by the hypotenuse. The hypotenuse here is the radius. For very ...
... For students with a knowledge of trig, another way to approach the problem is to note that the sine of an angle equals the side opposite the angle divided by the hypotenuse. The hypotenuse here is the radius. For very ...
Final review - Physics and Astronomy
... that Big Bang happened everywhere in the universe. That the temperature is so constant in every direction is best evidence for homogeneity on large scales. IF the Big Bang happened at one point in 3-d space: ...
... that Big Bang happened everywhere in the universe. That the temperature is so constant in every direction is best evidence for homogeneity on large scales. IF the Big Bang happened at one point in 3-d space: ...
PDF version - Caltech Astronomy
... physical processes at work? Genuine astrophysical understanding required a completely different set of tools: theoretical tools. Isaac Newton’s discoveries of the laws of motion and gravitation were of a different kind from those of Kepler and Galileo. Newton took into account not only Kepler’s laws ...
... physical processes at work? Genuine astrophysical understanding required a completely different set of tools: theoretical tools. Isaac Newton’s discoveries of the laws of motion and gravitation were of a different kind from those of Kepler and Galileo. Newton took into account not only Kepler’s laws ...
Summary: Nuclear burning in stars
... • Î automatic stretching of any feature into a trailing spiral. • But arms should rapidly wind up and disappear ...
... • Î automatic stretching of any feature into a trailing spiral. • But arms should rapidly wind up and disappear ...
The Superhero's Universe: Observing the Cosmos with X-ray Vision and Beyond
... ★ The thickness of the atmosphere of Saturn's moon Titan measured as it blocked X-rays from the Crab. ...
... ★ The thickness of the atmosphere of Saturn's moon Titan measured as it blocked X-rays from the Crab. ...