Practice Questions for Final
... A. The fact that we live in a universe made of matter is not surprising, because antimatter has never been shown to exist for real. B. Einstein's famous equation E = mc2 tells us that energy can turn into matter, but does not tell us that it can turn into antimatter. C. During the first 0.001 second ...
... A. The fact that we live in a universe made of matter is not surprising, because antimatter has never been shown to exist for real. B. Einstein's famous equation E = mc2 tells us that energy can turn into matter, but does not tell us that it can turn into antimatter. C. During the first 0.001 second ...
Deep Space Objects
... spirals, or “irregular” objects. Imagine something the size of an AA battery emitting the power of a nuclear reactor – that basically the idea behind quasars. A quasar is generally a galactic nucleus in the energetic early stages of formation, emitting up to two trillion Suns’ worth of energy from a ...
... spirals, or “irregular” objects. Imagine something the size of an AA battery emitting the power of a nuclear reactor – that basically the idea behind quasars. A quasar is generally a galactic nucleus in the energetic early stages of formation, emitting up to two trillion Suns’ worth of energy from a ...
Measuring the Masses of Galaxies in the Sloan Digital Sky Survey
... the redshift is measured from the observed positions of atomic lines in the spectra of galaxies and quasars for example, the red line of hydrogen (Hα) has a wavelength of 6.563 × 10-5 cm, 6563 Ångstroms, 656.3 nm suppose it were observed at 6603 Ångstroms (1 + z) = 6603 / 6563 = 1.0061 all other li ...
... the redshift is measured from the observed positions of atomic lines in the spectra of galaxies and quasars for example, the red line of hydrogen (Hα) has a wavelength of 6.563 × 10-5 cm, 6563 Ångstroms, 656.3 nm suppose it were observed at 6603 Ångstroms (1 + z) = 6603 / 6563 = 1.0061 all other li ...
Expansion of the Universe
... All of the elements, except for hydrogen and helium, originated from the nuclear fusion reactions of stars ...
... All of the elements, except for hydrogen and helium, originated from the nuclear fusion reactions of stars ...
Galaxies - C. Levesque
... this creates a black hole • A black hole is an object so dense that not even light can escape it. • We can find black holes by looking for objects in space ...
... this creates a black hole • A black hole is an object so dense that not even light can escape it. • We can find black holes by looking for objects in space ...
PHY 150
... track that the Sun will follow from when it leaves the main sequence to when it becomes a white dwarf. Approximately how much mass will the Sun have when it becomes a white dwarf? Where will the rest of the mass ...
... track that the Sun will follow from when it leaves the main sequence to when it becomes a white dwarf. Approximately how much mass will the Sun have when it becomes a white dwarf? Where will the rest of the mass ...
A glance at the beginning of the Universe
... •To determine the Hubble constant •To find the age of the Universe ...
... •To determine the Hubble constant •To find the age of the Universe ...
Ch. 26.5: The Expanding Universe
... Dark Matter = Does not give off radiation & cannot be detected Exerts gravitational force on visible matter Universe may be 90% + dark matter Why do we think Dark Matter exists? Galaxies are accelerating faster than they should be (based on the observable matter in the Universe). The acceleration du ...
... Dark Matter = Does not give off radiation & cannot be detected Exerts gravitational force on visible matter Universe may be 90% + dark matter Why do we think Dark Matter exists? Galaxies are accelerating faster than they should be (based on the observable matter in the Universe). The acceleration du ...
History of the Universe and Solar System
... traveling longer than they actually have. Thus the estimates of 14-18 BY, with 14 BY being the current choice of most physicists/astronomers. Observations of pulsating Cepheid variable stars in remote galaxies allowed Hubble astronomers to conclude the universe is roughly 13.7 billion years old. ...
... traveling longer than they actually have. Thus the estimates of 14-18 BY, with 14 BY being the current choice of most physicists/astronomers. Observations of pulsating Cepheid variable stars in remote galaxies allowed Hubble astronomers to conclude the universe is roughly 13.7 billion years old. ...
Aug 2015 supplement - Hermanus Astronomy
... the Big Bang, has also given us maps of our Milky Way Galaxy in microwaves (radiation at centimetre to millimetre wavelengths). Microwaves are generated by electrons spiralling in the galaxy’s magnetic field at nearly the speed of light — the synchrotron process: by collisions in interstellar plasma ...
... the Big Bang, has also given us maps of our Milky Way Galaxy in microwaves (radiation at centimetre to millimetre wavelengths). Microwaves are generated by electrons spiralling in the galaxy’s magnetic field at nearly the speed of light — the synchrotron process: by collisions in interstellar plasma ...
Place in Space
... space. Light can travel about seven times around Earth in one second. Astronomers use the speed of light to measure how far away things are in space. They use light years. A light year is the distance that light can travel in one year. In one year light travels about 9,460,000,000,000 kilometres. So ...
... space. Light can travel about seven times around Earth in one second. Astronomers use the speed of light to measure how far away things are in space. They use light years. A light year is the distance that light can travel in one year. In one year light travels about 9,460,000,000,000 kilometres. So ...
Ch. 26.5 - (www.ramsey.k12.nj.us).
... Dark Matter = Does not give off radiation & cannot be detected Exerts gravitational force on visible matter Universe may be 90% + dark matter Why do we think Dark Matter exists? Galaxies are accelerating faster than they should be (based on the observable matter in the Universe). The acceleration du ...
... Dark Matter = Does not give off radiation & cannot be detected Exerts gravitational force on visible matter Universe may be 90% + dark matter Why do we think Dark Matter exists? Galaxies are accelerating faster than they should be (based on the observable matter in the Universe). The acceleration du ...
galaxy
... What Are Galaxies? • A galaxy is a system of stars, dust, and gas held together by gravity. • Galaxies are large collections of stars….. millions and billions of stars • There are hundreds of billions of galaxies in the Universe • Millions to hundreds of billions of stars in each galaxy ...
... What Are Galaxies? • A galaxy is a system of stars, dust, and gas held together by gravity. • Galaxies are large collections of stars….. millions and billions of stars • There are hundreds of billions of galaxies in the Universe • Millions to hundreds of billions of stars in each galaxy ...
5X_Measuring_galaxy_redshifts
... One technique is to locate the image in the focal plane in register with that of a metal plate, prepared with drilled holes. Fibres are plugged into the holes. The 2dF/6dF systems (British-Australian) have the fibres connected to magnetic buttons (with miniature prisms). A robot sets up the field be ...
... One technique is to locate the image in the focal plane in register with that of a metal plate, prepared with drilled holes. Fibres are plugged into the holes. The 2dF/6dF systems (British-Australian) have the fibres connected to magnetic buttons (with miniature prisms). A robot sets up the field be ...
The Life Cycle of Stars Webquest
... Milky Way? 3. How does an elliptical galaxy differ from a spiral galaxy? 4. Describe an irregular galaxy. 5. Using your textbook, rank the three galaxy types from smallest to largest. ...
... Milky Way? 3. How does an elliptical galaxy differ from a spiral galaxy? 4. Describe an irregular galaxy. 5. Using your textbook, rank the three galaxy types from smallest to largest. ...
Practice Questions for Final
... A. The fact that we live in a universe made of matter is not surprising, because antimatter has never been shown to exist for real. B. Einstein's famous equation E = mc2 tells us that energy can turn into matter, but does not tell us that it can turn into antimatter. C. During the first 0.001 second ...
... A. The fact that we live in a universe made of matter is not surprising, because antimatter has never been shown to exist for real. B. Einstein's famous equation E = mc2 tells us that energy can turn into matter, but does not tell us that it can turn into antimatter. C. During the first 0.001 second ...
Our Sun - STEMpire Central
... What is hydrostatic equilibrium, and why does this explain why larger stars have shorter lifespans than smaller stars? ...
... What is hydrostatic equilibrium, and why does this explain why larger stars have shorter lifespans than smaller stars? ...
Milky Way structure
... • What is the closest galaxy to the Milky Way? The new answer to this old question is the Canis Major dwarf galaxy. For many years astronomers thought the Large Magellan Cloud (LMC) was closest, but its title was supplanted in 1994 by the Sagittarius dwarf galaxy. Recent measurements ind ...
... • What is the closest galaxy to the Milky Way? The new answer to this old question is the Canis Major dwarf galaxy. For many years astronomers thought the Large Magellan Cloud (LMC) was closest, but its title was supplanted in 1994 by the Sagittarius dwarf galaxy. Recent measurements ind ...
Class 28 (Jun 2) - Physics at Oregon State University
... • Galaxies can collide, though not in the sense of a car accident. • The galaxies pass through one another, and their immense gravitational pull can tear both galaxies apart. • This can occur with no stars actually colliding! (The space is so enormous!) • Eventually, a new elliptical galaxy will for ...
... • Galaxies can collide, though not in the sense of a car accident. • The galaxies pass through one another, and their immense gravitational pull can tear both galaxies apart. • This can occur with no stars actually colliding! (The space is so enormous!) • Eventually, a new elliptical galaxy will for ...
Astronomical distance
... other galaxies are so vast that even light takes a long time to travel to us from these distant objects. As you know distances in astronomy can be measure in light seconds, light hours or light years. Using that idea the Sun is 8½ light minutes away – that means it takes light 8½ minutes to reach us ...
... other galaxies are so vast that even light takes a long time to travel to us from these distant objects. As you know distances in astronomy can be measure in light seconds, light hours or light years. Using that idea the Sun is 8½ light minutes away – that means it takes light 8½ minutes to reach us ...
How Far is far ?
... 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 ...
What have we learned?
... – Deep observations of the universe show us the history of galaxies because we are seeing galaxies as they were at different ages. ...
... – Deep observations of the universe show us the history of galaxies because we are seeing galaxies as they were at different ages. ...
Lecture 7 Stars and Galaxies and Nebula, (Oh My!) Feb 18 2003
... Outer layers of gas are blown off from the core of a star. The core often goes on to become a white dwarf. The eject gas is illuminated by the remaining star. This is the fate of most stars, including our own Sun. ...
... Outer layers of gas are blown off from the core of a star. The core often goes on to become a white dwarf. The eject gas is illuminated by the remaining star. This is the fate of most stars, including our own Sun. ...
2010_02_04 LP08 Our Galactic Home
... • Answer Now: Draw a picture of our galaxy. • Goal: – Understand how distances are calculated – Be able to draw a picture of our galaxy • From the side • From the top ...
... • Answer Now: Draw a picture of our galaxy. • Goal: – Understand how distances are calculated – Be able to draw a picture of our galaxy • From the side • From the top ...
Galaxy
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A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas and dust, and dark matter. The word galaxy is derived from the Greek galaxias (γαλαξίας), literally ""milky"", a reference to the Milky Way. Galaxies range in size from dwarfs with just a few thousand (103) stars to giants with one hundred trillion (1014) stars, each orbiting their galaxy's own center of mass. Galaxies are categorized according to their visual morphology, including elliptical, spiral, and irregular. Many galaxies are thought to have black holes at their active centers. The Milky Way's central black hole, known as Sagittarius A*, has a mass four million times greater than our own Sun. As of July 2015, EGSY8p7 is the oldest and most distant galaxy with a light travel distance of 13.2 billion light-years from Earth, and observed as it existed 570 million years after the Big Bang. Previously, as of May 2015, EGS-zs8-1 was the most distant known galaxy, estimated to have a light travel distance of 13.1 billion light-years away and to have 15% of the mass of the Milky Way.Approximately 170 billion (1.7 × 1011) to 200 billion (2.0 × 1011) galaxies exist in the observable universe. Most of the galaxies are 1,000 to 100,000 parsecs in diameter and usually separated by distances on the order of millions of parsecs (or megaparsecs). The space between galaxies is filled with a tenuous gas with an average density less than one atom per cubic meter. The majority of galaxies are gravitationally organized into associations known as galaxy groups, clusters, and superclusters. At the largest scale, these associations are generally arranged into sheets and filaments that are surrounded by immense voids.