chapter 26 instructor notes
... the observed very small proportion of low-metallicity G dwarfs in the Galactic disk and model predictions for a sizable fraction (~½), given that the original population of low-metallicity stars from the Galaxy’s formation has not had time to evolve away from the main sequence. Perhaps the amount of ...
... the observed very small proportion of low-metallicity G dwarfs in the Galactic disk and model predictions for a sizable fraction (~½), given that the original population of low-metallicity stars from the Galaxy’s formation has not had time to evolve away from the main sequence. Perhaps the amount of ...
Summer 2013, Vol. 2, No. 2 - CAAUL
... The session on cosmology was mostly devoted to theoretical aspects. In this sense it was not fully representative of current research in Portugal, where the field of observational cosmology has been growing. Indeed, there are Portuguese researchers involved in the recent results of the Planck missio ...
... The session on cosmology was mostly devoted to theoretical aspects. In this sense it was not fully representative of current research in Portugal, where the field of observational cosmology has been growing. Indeed, there are Portuguese researchers involved in the recent results of the Planck missio ...
Big Bang and Beyond
... – If you wanted to produce carbon and oxygen in roughly equal quantities by stellar nucleosynthesis, these are the two basic levels you would have to fix, and your fixing would have to be just about where these levels are actually found to be.... – A commonsense interpretation of the facts suggests ...
... – If you wanted to produce carbon and oxygen in roughly equal quantities by stellar nucleosynthesis, these are the two basic levels you would have to fix, and your fixing would have to be just about where these levels are actually found to be.... – A commonsense interpretation of the facts suggests ...
The Missing Mass
... Stars near the galactic center don’t need to travel far to circle the galaxy, but stars further out can take a long time to go around. An initial line of stars will be drawn out into a spiral. ...
... Stars near the galactic center don’t need to travel far to circle the galaxy, but stars further out can take a long time to go around. An initial line of stars will be drawn out into a spiral. ...
Word
... Now that you have used Hubble’s constant on your own, describe the significance of Hubble’s constant in your own words. Consider these questions in your explanation. 1. Does the Universe have edges or a center? 2. What does this mean in terms of expansion? 3. Is expansion technically relative to the ...
... Now that you have used Hubble’s constant on your own, describe the significance of Hubble’s constant in your own words. Consider these questions in your explanation. 1. Does the Universe have edges or a center? 2. What does this mean in terms of expansion? 3. Is expansion technically relative to the ...
globular cluster - Harding University
... When Cepheid variables were first utilized, there were no Cepheid variables close enough to measure their distance using direct parallax measurements. Distances to the Cepheid variables in our own galaxy were determined using statistical techniques, and were dependent upon these theoretical calculat ...
... When Cepheid variables were first utilized, there were no Cepheid variables close enough to measure their distance using direct parallax measurements. Distances to the Cepheid variables in our own galaxy were determined using statistical techniques, and were dependent upon these theoretical calculat ...
Test #4
... c) The spiral arms, d) A visually bright, massive, object around which all objects in the Galaxy move. 2. What two observations of an object allow for a determination of the Milky Way’s mass? a) Object’s mass and velocity, b) Object’s age and distance from the galactic center c) Object’s mass and ag ...
... c) The spiral arms, d) A visually bright, massive, object around which all objects in the Galaxy move. 2. What two observations of an object allow for a determination of the Milky Way’s mass? a) Object’s mass and velocity, b) Object’s age and distance from the galactic center c) Object’s mass and ag ...
Great Discoveries in Astronomy and Astrophysics 171.112
... How did we come to know what we know about the Universe? This course will focus on key discoveries in astronomy and astrophysics from the speed of light to the speed of the expanding and now accelerating Universe, from the discovery of Neptune to the modern detection of extrasolar planets, spanning ...
... How did we come to know what we know about the Universe? This course will focus on key discoveries in astronomy and astrophysics from the speed of light to the speed of the expanding and now accelerating Universe, from the discovery of Neptune to the modern detection of extrasolar planets, spanning ...
Measuring Distances - Stockton University
... • A certain type of exploding star called a Type Ia supernova appears to follow a fairly consistent light-curve, peaking at an absolute magnitude of about Mv -19. This makes them 23.8 magnitudes more luminous than the Sun, equivalent to a factor of 1023.8/2.5 = 3.3 x 109 . • These are now playing ...
... • A certain type of exploding star called a Type Ia supernova appears to follow a fairly consistent light-curve, peaking at an absolute magnitude of about Mv -19. This makes them 23.8 magnitudes more luminous than the Sun, equivalent to a factor of 1023.8/2.5 = 3.3 x 109 . • These are now playing ...
How Do Astronomers Gather Information About
... How Do Astronomers Gather Information About Space? Most of the information we have about the universe comes from ____________. Objects in the universe, such as _____________________, emit radiation. This radiation travels in the form of ____________. Different kinds of radiation have differing _____ ...
... How Do Astronomers Gather Information About Space? Most of the information we have about the universe comes from ____________. Objects in the universe, such as _____________________, emit radiation. This radiation travels in the form of ____________. Different kinds of radiation have differing _____ ...
Linking Asteroids and Meteorites through Reflectance
... • At the dawn of the 20th century, most astronomers thought that the Milky Way Galaxy was the universe, and it measured only a few thousand light-years across. ...
... • At the dawn of the 20th century, most astronomers thought that the Milky Way Galaxy was the universe, and it measured only a few thousand light-years across. ...
Lecture 12: Galaxies View of the Galaxy from within Comparison to
... • It has a disk about 25 kpc (80,000 ly) in radius and about 600 pc thick, with interstellar dust and gas strongly concentrated in the disk plane. • The Sun orbits around the Galactic centre at a speed of about 220 km s-1. • It takes about 220 million years to complete one orbit ...
... • It has a disk about 25 kpc (80,000 ly) in radius and about 600 pc thick, with interstellar dust and gas strongly concentrated in the disk plane. • The Sun orbits around the Galactic centre at a speed of about 220 km s-1. • It takes about 220 million years to complete one orbit ...
Astronomy (stars, galaxies and the Universe)
... All stars are created from the gases in a nebula When the contracting gas and dust from a nebula become so dense and hot that nuclear fusion begins, the protostar begins to shine When a star begins to run out of fuel, its core shrinks and its outer portion expands The evolutionary path of a star dep ...
... All stars are created from the gases in a nebula When the contracting gas and dust from a nebula become so dense and hot that nuclear fusion begins, the protostar begins to shine When a star begins to run out of fuel, its core shrinks and its outer portion expands The evolutionary path of a star dep ...
Astronomy (stars, galaxies and the Universe)
... All stars are created from the gases in a nebula When the contracting gas and dust from a nebula become so dense and hot that nuclear fusion begins, the protostar begins to shine When a star begins to run out of fuel, its core shrinks and its outer portion expands The evolutionary path of a star dep ...
... All stars are created from the gases in a nebula When the contracting gas and dust from a nebula become so dense and hot that nuclear fusion begins, the protostar begins to shine When a star begins to run out of fuel, its core shrinks and its outer portion expands The evolutionary path of a star dep ...
Our Place in the Universe (Chapter 1) The Structure and Size of the
... The Sun is a star. The Moon only reflects light from the Sun, so it is not a star. Stars are large balls of hot gas, mostly hydrogen and helium The Sun generates heat and light by a process called nuclear fusion This is different from what happens in nuclear power stations ...
... The Sun is a star. The Moon only reflects light from the Sun, so it is not a star. Stars are large balls of hot gas, mostly hydrogen and helium The Sun generates heat and light by a process called nuclear fusion This is different from what happens in nuclear power stations ...
Powerpoint
... • Distance from the Sun to Pluto – 0.006 light years = 6 x 109 km • Diameter of the Sun – 7 x 105 km • You could fit 108 Suns in the distance between the Sun and its closest neighbour • There is a lot of empty space between stars (or between stellar systems) in galaxies ...
... • Distance from the Sun to Pluto – 0.006 light years = 6 x 109 km • Diameter of the Sun – 7 x 105 km • You could fit 108 Suns in the distance between the Sun and its closest neighbour • There is a lot of empty space between stars (or between stellar systems) in galaxies ...
Fulltext PDF - Indian Academy of Sciences
... other planets have always been there, and will persist as such till the last gasp of the world. For long centuries it was a tenet that matters celestial were incorruptible, preserving form and stability for all of time9. This view changed after the rise of modern science. The idea arose that stars b ...
... other planets have always been there, and will persist as such till the last gasp of the world. For long centuries it was a tenet that matters celestial were incorruptible, preserving form and stability for all of time9. This view changed after the rise of modern science. The idea arose that stars b ...
AS2001 - University of St Andrews
... The Big Bang (caused by ???) Symmetry breaking matter/anti-matter ratio Quark + antiquark annihilation photon/baryon ratio The quark soup heavy quark decay Quark-Hadron phase transition and neutron decay n/p ratio Big Bang nucleosynthesis primordial abundances Xp = 0.75 ...
... The Big Bang (caused by ???) Symmetry breaking matter/anti-matter ratio Quark + antiquark annihilation photon/baryon ratio The quark soup heavy quark decay Quark-Hadron phase transition and neutron decay n/p ratio Big Bang nucleosynthesis primordial abundances Xp = 0.75 ...
Measuring large distances
... The easiest way to measure the distance to a planet or star is through a method called parallax. • The parallax method (or triangulation, as it’s sometimes known) depends on having a baseline of known length. • A distant object is sighted accurately from both ends of the baseline. The angles to the ...
... The easiest way to measure the distance to a planet or star is through a method called parallax. • The parallax method (or triangulation, as it’s sometimes known) depends on having a baseline of known length. • A distant object is sighted accurately from both ends of the baseline. The angles to the ...
Lecture Eleven (Powerpoint format)
... Kip went to work on the problem and actually worked out the details using relativity theory. He suggested that wormholes might work. Intringued, Thorne picked up the wormhole problem over the next several years and began pursuing it as an active research project. Inspired by his bold lead on s ...
... Kip went to work on the problem and actually worked out the details using relativity theory. He suggested that wormholes might work. Intringued, Thorne picked up the wormhole problem over the next several years and began pursuing it as an active research project. Inspired by his bold lead on s ...
lecture2_3
... •Study their motions, measure their speeds •Fundamental to understand the evolution of the sources and how their interact with each other (e.g. merging, collisions) •Measure their redshift, determine their distance from us •Fundamental to chart the large-scale structure of the Universe and to study ...
... •Study their motions, measure their speeds •Fundamental to understand the evolution of the sources and how their interact with each other (e.g. merging, collisions) •Measure their redshift, determine their distance from us •Fundamental to chart the large-scale structure of the Universe and to study ...
Universe and Stars Project Final Due Date
... 2. Describe scientific explanations and conditions that explain and contributed to the origin of life on Earth (give at least 3 examples of conditions that contributed to life on Earth). http://www.ecology.com/2011/09/10/earths-beginnings-origins-life/ 3. Describe how the universe is organized and w ...
... 2. Describe scientific explanations and conditions that explain and contributed to the origin of life on Earth (give at least 3 examples of conditions that contributed to life on Earth). http://www.ecology.com/2011/09/10/earths-beginnings-origins-life/ 3. Describe how the universe is organized and w ...