The Milky Way - 清華大學物理系歡迎頁 Welcome to
... Comparing absolute and apparent magnitudes of Cepheids, we can measure their distances (using the 1/d2 law)! The Cepheid distance measurements were the first distance determinations that worked out to distances beyond our Milky Way! Cepheids are up to ~ 40,000 times more luminous than our sun => can ...
... Comparing absolute and apparent magnitudes of Cepheids, we can measure their distances (using the 1/d2 law)! The Cepheid distance measurements were the first distance determinations that worked out to distances beyond our Milky Way! Cepheids are up to ~ 40,000 times more luminous than our sun => can ...
Stars and Stellar Evolution
... End lives in supernovas = becomes 1 million times brighter (rare) Consumes most of its fuel -> gas pressure does not balance gravitational pull --> collapses --> huge implosion --> shock wave moves out and destroys the star (outer shell blasted into space) ...
... End lives in supernovas = becomes 1 million times brighter (rare) Consumes most of its fuel -> gas pressure does not balance gravitational pull --> collapses --> huge implosion --> shock wave moves out and destroys the star (outer shell blasted into space) ...
Star Cycle2013
... fuse it together. You actually end up with less energy than you started with! So instead of generating pressure to hold up the outer layers, the iron fusion actually takes it out of the core. Thus, there is nothing left to combat gravity from the outer layers. ...
... fuse it together. You actually end up with less energy than you started with! So instead of generating pressure to hold up the outer layers, the iron fusion actually takes it out of the core. Thus, there is nothing left to combat gravity from the outer layers. ...
The Temperature of Stars
... – In the Northern Hemisphere, the movement of these stars makes them appear to circle the North Star. – These circling stars are called circumpolar stars. ...
... – In the Northern Hemisphere, the movement of these stars makes them appear to circle the North Star. – These circling stars are called circumpolar stars. ...
Test#4
... 18. The reason the Solar system does not have a lot of dust and gas between the planets is a) the solar wind blew the dust and gas out of the Solar system b) the planets accreted all the gas and dust c) the early Solar system was made up only of Hydrogen and Helium d) the Sun burns them up 19. All ...
... 18. The reason the Solar system does not have a lot of dust and gas between the planets is a) the solar wind blew the dust and gas out of the Solar system b) the planets accreted all the gas and dust c) the early Solar system was made up only of Hydrogen and Helium d) the Sun burns them up 19. All ...
Integrative Studies 410 Our Place in the Universe
... • Eclipsing binaries (stars do not change physically, only their relative position changes) • Nova (two stars “collaborating” to produce “star eruption”) • Cepheids (stars do change physically) • RR Lyrae Stars (stars do change physically) • Mira Stars (stars do change physically) ...
... • Eclipsing binaries (stars do not change physically, only their relative position changes) • Nova (two stars “collaborating” to produce “star eruption”) • Cepheids (stars do change physically) • RR Lyrae Stars (stars do change physically) • Mira Stars (stars do change physically) ...
Old Final
... Draw and label an H-R diagram. Be sure to label the axes (indicate where larger and smaller values are), the main sequence, the giants, super giants, white dwarfs and the location of the Sun. ...
... Draw and label an H-R diagram. Be sure to label the axes (indicate where larger and smaller values are), the main sequence, the giants, super giants, white dwarfs and the location of the Sun. ...
a new isotopic abundance anomaly in chemically peculiar stars
... they decided to measure additional spectra, concentrating on magnetic CP stars, but including a few other exotic types. Eventually, they assembled the 22 wavelength measurements for CP stars displayed in Figure 3. Figure 3 shows that the two wavelengths are correlated – both are shifted by roughly t ...
... they decided to measure additional spectra, concentrating on magnetic CP stars, but including a few other exotic types. Eventually, they assembled the 22 wavelength measurements for CP stars displayed in Figure 3. Figure 3 shows that the two wavelengths are correlated – both are shifted by roughly t ...
Module G - U1_ L3 - Life Cycle of Stars
... contracts under its own gravity and its temperature rises. • Energy is transferred to a thin shell of hydrogen surrounding the core, where hydrogen fusion continues and the shell expands. • When fusion ends completely, the star begins to eject matter, until only the core remains. What is the life cy ...
... contracts under its own gravity and its temperature rises. • Energy is transferred to a thin shell of hydrogen surrounding the core, where hydrogen fusion continues and the shell expands. • When fusion ends completely, the star begins to eject matter, until only the core remains. What is the life cy ...
star
... • Very massive stars can explode in a supernova, which destroys the star. • Iron in the core does not fuse and the core collapses quickly under the force of gravity. • The normal space within atoms is eliminated, leaving a dense core of neutrons, or a neutron star. ...
... • Very massive stars can explode in a supernova, which destroys the star. • Iron in the core does not fuse and the core collapses quickly under the force of gravity. • The normal space within atoms is eliminated, leaving a dense core of neutrons, or a neutron star. ...
Denton ISD
... A galaxy that is moving toward Earth will show — A a red shift in its spectrum B an increase in light-years ...
... A galaxy that is moving toward Earth will show — A a red shift in its spectrum B an increase in light-years ...
ppt
... Therefore stars have an extremely large gravitational attraction that keeps their plasma held together. As gravity acts equally in all directions the plasma that forms the star is moulded into a sphere. But there must be some force keeping the star from collapsing in on itself. Because stars are so ...
... Therefore stars have an extremely large gravitational attraction that keeps their plasma held together. As gravity acts equally in all directions the plasma that forms the star is moulded into a sphere. But there must be some force keeping the star from collapsing in on itself. Because stars are so ...
Stars and Universe Test Review - Garnet Valley School District
... 25. _________________________ the apparent change in position of an object when you look at it from different places 26. _________________________ made of neutrons formed as protons and electrons are squeezed together. It is very dense 27. _________________________ a continuous band of colors with s ...
... 25. _________________________ the apparent change in position of an object when you look at it from different places 26. _________________________ made of neutrons formed as protons and electrons are squeezed together. It is very dense 27. _________________________ a continuous band of colors with s ...
Mountain Skies
... About an hour after midnight the beautiful ringed planet Saturn will rise and, by dawn, when Jupiter is setting in the west, Saturn will be visible high in the south. The beautiful rings of Saturn are tilted at 26°, nearly the maximum, ...
... About an hour after midnight the beautiful ringed planet Saturn will rise and, by dawn, when Jupiter is setting in the west, Saturn will be visible high in the south. The beautiful rings of Saturn are tilted at 26°, nearly the maximum, ...
HR Diagram Lab Handout
... Background: You are about to create your own HR Diagram, a chart that revolutionized the study of stars. You will have a labeled chart and a series of points to plot. From these points, you can deduce a lot of information about stars! Please read the directions in each step of the activity closely b ...
... Background: You are about to create your own HR Diagram, a chart that revolutionized the study of stars. You will have a labeled chart and a series of points to plot. From these points, you can deduce a lot of information about stars! Please read the directions in each step of the activity closely b ...
The “Life” of Non-living Stars - Etiwanda E
... Hydrogen continues to fuse into helium Size of star changes very little during this stage ...
... Hydrogen continues to fuse into helium Size of star changes very little during this stage ...
Recap: High Mass Stars
... Neutron Star • Star with a core from 1.4 to 3 times the size of the Sun becomes a neutron. • Electrons and neutrons combine into neutrons. • 10 km (6 mi) in diameter with a mass more than our Sun! • A teaspoon of neutron star would be about 10 million tons • Acts like a huge magnet with magnetic p ...
... Neutron Star • Star with a core from 1.4 to 3 times the size of the Sun becomes a neutron. • Electrons and neutrons combine into neutrons. • 10 km (6 mi) in diameter with a mass more than our Sun! • A teaspoon of neutron star would be about 10 million tons • Acts like a huge magnet with magnetic p ...
Planetarium Key Points
... Geographic Latitude is the elevation of the visible pole and, roughly, of Polaris The motion of the sphere seems uniform, for this reason it was the source for time telling, but the time scale that comes from is NOT uniform: rotation is slowing down, the day is longer and longer at the rate of 2 ...
... Geographic Latitude is the elevation of the visible pole and, roughly, of Polaris The motion of the sphere seems uniform, for this reason it was the source for time telling, but the time scale that comes from is NOT uniform: rotation is slowing down, the day is longer and longer at the rate of 2 ...
High Mass Stellar Evolution
... High mass stars (> 8 Msolar) have more fuel but they use it up much more quickly than low mass stars (higher luminosity). ...
... High mass stars (> 8 Msolar) have more fuel but they use it up much more quickly than low mass stars (higher luminosity). ...
Lecture 13, PPT version
... Globular clusters have short, stubby main sequences that “turn off” to the red giant region. The “turn off” point tells you the approximate age. ...
... Globular clusters have short, stubby main sequences that “turn off” to the red giant region. The “turn off” point tells you the approximate age. ...
Our Universe
... •Is there a black hole in the center of our Milky Way- YES! •The fundamental descriptions of black holes are based on equations in the theory of general relativity developed by the German-born physicist Albert Einstein. The theory was published in 1916. •The surface of a black hole is known as the e ...
... •Is there a black hole in the center of our Milky Way- YES! •The fundamental descriptions of black holes are based on equations in the theory of general relativity developed by the German-born physicist Albert Einstein. The theory was published in 1916. •The surface of a black hole is known as the e ...
Stellar kinematics
Stellar kinematics is the study of the movement of stars without needing to understand how they acquired their motion. This differs from stellar dynamics, which takes into account gravitational effects. The motion of a star relative to the Sun can provide useful information about the origin and age of a star, as well as the structure and evolution of the surrounding part of the Milky Way.In astronomy, it is widely accepted that most stars are born within molecular clouds known as stellar nurseries. The stars formed within such a cloud compose open clusters containing dozens to thousands of members. These clusters dissociate over time. Stars that separate themselves from the cluster's core are designated as members of the cluster's stellar association. If the remnant later drifts through the Milky Way as a coherent assemblage, then it is termed a moving group.