Some facts and concepts to have at your fingertips.
... • All kinds of light, from gamma rays through radio waves, move at the same speed (300,000 km/sec) through a vacuum. • A hot solid, liquid, or dense gas emits a continuous spectrum. The wavelength of the maximum intensity is related to the temperature of the material. Example: cannon ball at 3000 d ...
... • All kinds of light, from gamma rays through radio waves, move at the same speed (300,000 km/sec) through a vacuum. • A hot solid, liquid, or dense gas emits a continuous spectrum. The wavelength of the maximum intensity is related to the temperature of the material. Example: cannon ball at 3000 d ...
qwk9
... A. Accretion disks and bi-polar jets are features associated with both star formation and active galactic nuclei B. Hayashi tracks describe the evolution of a star on the HR diagram after it has started nuclear fusion C. New stars in the Milky Way are born as a result of the gravitational collapse o ...
... A. Accretion disks and bi-polar jets are features associated with both star formation and active galactic nuclei B. Hayashi tracks describe the evolution of a star on the HR diagram after it has started nuclear fusion C. New stars in the Milky Way are born as a result of the gravitational collapse o ...
Study Guide Astronomy
... Chapter 4 Section 2 Characteristics of Stars (pages 126-133) 1. Name 5 characteristics used to classify stars. ...
... Chapter 4 Section 2 Characteristics of Stars (pages 126-133) 1. Name 5 characteristics used to classify stars. ...
The IR Universe
... Spitzer has found optically invisible galaxies so distant that we see them as they were only 3 billion years after the Big Bang. These galaxies are obscured by silicate dust, suggesting that planets could have formed even at this early time in the history of the Universe. ...
... Spitzer has found optically invisible galaxies so distant that we see them as they were only 3 billion years after the Big Bang. These galaxies are obscured by silicate dust, suggesting that planets could have formed even at this early time in the history of the Universe. ...
7_Big_bang
... Hubble’s constant H has dimensions of 1/time. Age of universe is about 1/H. Exact value ...
... Hubble’s constant H has dimensions of 1/time. Age of universe is about 1/H. Exact value ...
Stars and The Universe
... Read Chapters 1 and 2. Write out the definitions of each of the listed key ideas for yourself. Try to do this without the help of the book. Afterward, go back and use the book to check your answers and study the key ideas you missed the first time through. On separate sheets of paper answer the Revi ...
... Read Chapters 1 and 2. Write out the definitions of each of the listed key ideas for yourself. Try to do this without the help of the book. Afterward, go back and use the book to check your answers and study the key ideas you missed the first time through. On separate sheets of paper answer the Revi ...
3rd EXAM VERSION A key - Department of Physics and Astronomy
... in the vicinity, it becomes dormant until another galaxy happens to pass nearby. C. The continual infall of material causes the mass of the black hole to grow until it explodes, resulting in a supernova. D. The immense radiation output from the quasar carries away energy. The mass of the black hole ...
... in the vicinity, it becomes dormant until another galaxy happens to pass nearby. C. The continual infall of material causes the mass of the black hole to grow until it explodes, resulting in a supernova. D. The immense radiation output from the quasar carries away energy. The mass of the black hole ...
Chapter 15
... hydrogen and helium (and other forms of matter) clumped together by gravitational attraction to form countless trillions of stars. Billions of galaxies, each a cluster of billions of stars, now form most of the visible mass in the universe. ...
... hydrogen and helium (and other forms of matter) clumped together by gravitational attraction to form countless trillions of stars. Billions of galaxies, each a cluster of billions of stars, now form most of the visible mass in the universe. ...
Astronomy Notes: Deep Space
... and Journey to a Black Hole: http://hubblesite.org/explore_astronomy/black_holes/home.html and then http://amazing-space.stsci.edu/resources/explorations to do the following: planet impact, mission mastermind, Hubble Deep Field Academy, Telescopes from the Ground up, Galaxies from the Ground Up, and ...
... and Journey to a Black Hole: http://hubblesite.org/explore_astronomy/black_holes/home.html and then http://amazing-space.stsci.edu/resources/explorations to do the following: planet impact, mission mastermind, Hubble Deep Field Academy, Telescopes from the Ground up, Galaxies from the Ground Up, and ...
Earth in space
... of the spectrum indicated that distant galaxies are moving away from the earth… If the shift had been towards the blue end of the spectrum, the galaxies would be moving towards the earth ...
... of the spectrum indicated that distant galaxies are moving away from the earth… If the shift had been towards the blue end of the spectrum, the galaxies would be moving towards the earth ...
The Hubble Redshift Distance Relation
... During the early part of the twentieth century, an astronomer by the name of Vesto Slipher discovered that the spectra of galaxies indicated that most of them were moving away from our Galaxy. By noting the shift of characteristic lines towards the red end of the spectrum, he surmised that most gala ...
... During the early part of the twentieth century, an astronomer by the name of Vesto Slipher discovered that the spectra of galaxies indicated that most of them were moving away from our Galaxy. By noting the shift of characteristic lines towards the red end of the spectrum, he surmised that most gala ...
Teaching Text Structure with Understanding the Scale of the Universe
... By 1920, many scientists began to think that some of the objects they were seeing must be other galaxies like the Milky Way but separate from the Milky Way. They spoke of these separate clusters of stars as island universes. ...
... By 1920, many scientists began to think that some of the objects they were seeing must be other galaxies like the Milky Way but separate from the Milky Way. They spoke of these separate clusters of stars as island universes. ...
Hubble Deep Field
The Hubble Deep Field (HDF) is an image of a small region in the constellation Ursa Major, constructed from a series of observations by the Hubble Space Telescope. It covers an area 2.5 arcminutes across, about one 24-millionth of the whole sky, which is equivalent in angular size to a 65 mm tennis ball at a distance of 100 metres. The image was assembled from 342 separate exposures taken with the Space Telescope's Wide Field and Planetary Camera 2 over ten consecutive days between December 18 and December 28, 1995.The field is so small that only a few foreground stars in the Milky Way lie within it; thus, almost all of the 3,000 objects in the image are galaxies, some of which are among the youngest and most distant known. By revealing such large numbers of very young galaxies, the HDF has become a landmark image in the study of the early universe, with the associated scientific paper having received over 900 citations by the end of 2014.Three years after the HDF observations were taken, a region in the south celestial hemisphere was imaged in a similar way and named the Hubble Deep Field South. The similarities between the two regions strengthened the belief that the universe is uniform over large scales and that the Earth occupies a typical region in the Universe (the cosmological principle). A wider but shallower survey was also made as part of the Great Observatories Origins Deep Survey. In 2004 a deeper image, known as the Hubble Ultra-Deep Field (HUDF), was constructed from a few months of light exposure. The HUDF image was at the time the most sensitive astronomical image ever made at visible wavelengths, and it remained so until the Hubble Extreme Deep Field (XDF) was released in 2012.