Answer to question 1 - Northwestern University
... •The result is that the envelope then comes falling down, • Over shoots inward • Then starts over ...
... •The result is that the envelope then comes falling down, • Over shoots inward • Then starts over ...
Lecture 1
... time = (1.3x108s)x(1min/60s)x(1hour/60min)x(1day/24hour)x(1year/365days) time it takes for light to reach us = 4.11 years When we look at Alpha Centauri we are looking 4 years into the past! ...
... time = (1.3x108s)x(1min/60s)x(1hour/60min)x(1day/24hour)x(1year/365days) time it takes for light to reach us = 4.11 years When we look at Alpha Centauri we are looking 4 years into the past! ...
Beyond Our Solar System
... far from the sun that they are easy to place in the diagram. – These are cold worlds far from the sun’s warmth. – Light from the sun reaches Earth in only 8 minutes, but it takes over 4 hours to reach Neptune. ...
... far from the sun that they are easy to place in the diagram. – These are cold worlds far from the sun’s warmth. – Light from the sun reaches Earth in only 8 minutes, but it takes over 4 hours to reach Neptune. ...
Birth of Elements
... The underlying process by which elements are synthesised in stars is nuclear fusion. A large cloud of matter contracts under its own gravitational pull and once the density and temperature of the material in the core of the cloud reaches a critical value, fusion begins. Now, different atomic nuclei ...
... The underlying process by which elements are synthesised in stars is nuclear fusion. A large cloud of matter contracts under its own gravitational pull and once the density and temperature of the material in the core of the cloud reaches a critical value, fusion begins. Now, different atomic nuclei ...
Galactic astronomy - Sierra College Astronomy Home Page
... Pure H & He stars, the first stars born after the Big Bang when very little metals existed. Stellar models tell us that Pop III stars would have been massive, shortlived, and none would have survived to current times. ...
... Pure H & He stars, the first stars born after the Big Bang when very little metals existed. Stellar models tell us that Pop III stars would have been massive, shortlived, and none would have survived to current times. ...
The Mass Assembly of Galaxies
... Surprinsingly, therefore, massive star formation has occurred near or at the Galactic Center within the past few million years. The most promissing explanations for this are: 1. Stars have formed in-situ out of the fragmentation of a very dense gas disk 2. The young stars come from an in-spiralling ...
... Surprinsingly, therefore, massive star formation has occurred near or at the Galactic Center within the past few million years. The most promissing explanations for this are: 1. Stars have formed in-situ out of the fragmentation of a very dense gas disk 2. The young stars come from an in-spiralling ...
Name: Period: ______ Date: Light/Astronomy Study Guide What are
... 19. Explain “red shift”, and how it is useful. This is the result of the Doppler effect on the light from galaxies that are moving away from us. The waves that are going towards us are expanded to so that the normal spectrum of elements are shifted in the red direction. 20. Describe the three main p ...
... 19. Explain “red shift”, and how it is useful. This is the result of the Doppler effect on the light from galaxies that are moving away from us. The waves that are going towards us are expanded to so that the normal spectrum of elements are shifted in the red direction. 20. Describe the three main p ...
Hertzsprung-Russell Diagram—key to understanding properties of stars. 26 Sept
... – A show highlighting the current sky, spectacular gatherings of Venus with the moon and other planets in coming months. See what Galileo saw through his telescope 400 years ago— the Milky Way and the Pleiades, details on the moon, the four moons of Jupiter, the phases of Venus, and the mysterious d ...
... – A show highlighting the current sky, spectacular gatherings of Venus with the moon and other planets in coming months. See what Galileo saw through his telescope 400 years ago— the Milky Way and the Pleiades, details on the moon, the four moons of Jupiter, the phases of Venus, and the mysterious d ...
Terrestrial Planet (and Life) Finder
... If we leave out fi and fc (i.e. assume they are unity—all life forms develop our kind of intelligence and technology and try to communicate), we are calculating the number of life-bearing planets in our Galaxy at any given time (like now). We know there has been life on our planet for 3 billion year ...
... If we leave out fi and fc (i.e. assume they are unity—all life forms develop our kind of intelligence and technology and try to communicate), we are calculating the number of life-bearing planets in our Galaxy at any given time (like now). We know there has been life on our planet for 3 billion year ...
Measuring the Properties of Stars - Sierra College Astronomy Home
... Binary stars are important because they allow one to measure masses of stars using Newton’s version of Kepler’s laws. Knowledge of the size of one of the star’s ellipses, along with knowledge of the period of its motion, permits calculation of the total mass of the two stars. To determine how the sy ...
... Binary stars are important because they allow one to measure masses of stars using Newton’s version of Kepler’s laws. Knowledge of the size of one of the star’s ellipses, along with knowledge of the period of its motion, permits calculation of the total mass of the two stars. To determine how the sy ...
Open Houses at the Campus Observatory Astronomical Horizons Lecture
... Electron degeneracy pressure goes away because electrons combine with protons, making neutrons and neutrinos Neutrons collapse to the center, forming a neutron ...
... Electron degeneracy pressure goes away because electrons combine with protons, making neutrons and neutrinos Neutrons collapse to the center, forming a neutron ...
Interstellar medium, birth and life of stars
... then to oxygen. In a massive giant, helium fusion begins gradually. In a less massive giant, it begins suddenly in a process called helium flash. The age of a stellar cluster can be estimated by plotting its stars on an H-R diagram. The upper portion of the main sequence disappears first, because ...
... then to oxygen. In a massive giant, helium fusion begins gradually. In a less massive giant, it begins suddenly in a process called helium flash. The age of a stellar cluster can be estimated by plotting its stars on an H-R diagram. The upper portion of the main sequence disappears first, because ...
Super Giant
... Nebular Theory- 5-4.6bya supernova created a nebula which gravity pulled together to first form our Sun and then the surrounding planets How does the intensity and dangerousness of energy in the electromagnetic spectrum change from one end to the end next? What causes this increase or decrease in in ...
... Nebular Theory- 5-4.6bya supernova created a nebula which gravity pulled together to first form our Sun and then the surrounding planets How does the intensity and dangerousness of energy in the electromagnetic spectrum change from one end to the end next? What causes this increase or decrease in in ...
Stars III The Hertzsprung
... through interstellar clouds (explaining the reddened stars at the edge of the cloud) • If there is enough dust, everything can be blocked, causing dark patches • It is not a coincidence that there are young, blue stars near this dark cloud • Stars are forming in these dense clouds of dust and gas ...
... through interstellar clouds (explaining the reddened stars at the edge of the cloud) • If there is enough dust, everything can be blocked, causing dark patches • It is not a coincidence that there are young, blue stars near this dark cloud • Stars are forming in these dense clouds of dust and gas ...
Word doc - UC-HiPACC - University of California, Santa Cruz
... Most importantly, both simulations were run at high spatial resolution to explore fine details of an explosion. The supermassive star Chen modeled had a radius of about 103 million miles—about 10% larger than Earth’s orbit—with a resolution of 30,000 miles, only 0.03% of the radius. Live fast, die y ...
... Most importantly, both simulations were run at high spatial resolution to explore fine details of an explosion. The supermassive star Chen modeled had a radius of about 103 million miles—about 10% larger than Earth’s orbit—with a resolution of 30,000 miles, only 0.03% of the radius. Live fast, die y ...
Grossmugl Star Walk Installation
... 600 and 500 BC. This was the time when Babylon experienced one of its wealthiest periods under king Nebuchadnezzar II, democracy was invented in Athens and the city of Rome was still a small kingdom, far from the great empire it would later become. When stargazing at this historic site one can almos ...
... 600 and 500 BC. This was the time when Babylon experienced one of its wealthiest periods under king Nebuchadnezzar II, democracy was invented in Athens and the city of Rome was still a small kingdom, far from the great empire it would later become. When stargazing at this historic site one can almos ...
Searching For Planets Beyond Our Solar System - Cosmos
... the STARS asteroseismology mission (an unsuccessful candidate for the ESA Horizon 2000 M3 mission), and as one of the main objectives of the COROT mission under consideration by CNES for launch in 2002 (gure adapted from the NASA FRESIP proposal). target star (Figure 4). The geometric probabilities ...
... the STARS asteroseismology mission (an unsuccessful candidate for the ESA Horizon 2000 M3 mission), and as one of the main objectives of the COROT mission under consideration by CNES for launch in 2002 (gure adapted from the NASA FRESIP proposal). target star (Figure 4). The geometric probabilities ...
Powerpoint file
... disk left behind after the supernova explosion (more likely) Debris disk found around another pulsar fits this picture! ...
... disk left behind after the supernova explosion (more likely) Debris disk found around another pulsar fits this picture! ...
Ursa Minor
Ursa Minor (Latin: ""Smaller She-Bear"", contrasting with Ursa Major), also known as the Little Bear, is a constellation in the northern sky. Like the Great Bear, the tail of the Little Bear may also be seen as the handle of a ladle, hence the name Little Dipper. It was one of the 48 constellations listed by the 2nd-century astronomer Ptolemy, and remains one of the 88 modern constellations. Ursa Minor has traditionally been important for navigation, particularly by mariners, due to Polaris being the North Star.Polaris, the brightest star in the constellation, is a yellow-white supergiant and the brightest Cepheid variable star in the night sky, ranging from apparent magnitude 1.97 to 2.00. Beta Ursae Minoris, also known as Kochab, is an aging star that has swollen and cooled to become an orange giant with an apparent magnitude of 2.08, only slightly fainter than Polaris. Kochab and magnitude 3 Gamma Ursae Minoris have been called the ""guardians of the pole star"". Planets have been detected orbiting four of the stars, including Kochab. The constellation also contains an isolated neutron star—Calvera—and H1504+65, the hottest white dwarf yet discovered with a surface temperature of 200,000 K.