presentation source
... “[Even though T Tauri associations could all have similar colors implying young age by coincidence], it is of course, tempting to search for a connection between the T Tauri stars and Bok’s ‘globules,’ but we must admit that at present there is no evidence of any objects intermediate between the two ...
... “[Even though T Tauri associations could all have similar colors implying young age by coincidence], it is of course, tempting to search for a connection between the T Tauri stars and Bok’s ‘globules,’ but we must admit that at present there is no evidence of any objects intermediate between the two ...
Galaxies and their properties
... through the dissipational collapse of a gas cloud with some initial angular momentum. This occurs for hot clouds, T > 104 K, as they efficiently radiate their binding energy and contract, until its energy reaches a minimum. In the absence of interactions with other masses (e.g., the dark matter halo ...
... through the dissipational collapse of a gas cloud with some initial angular momentum. This occurs for hot clouds, T > 104 K, as they efficiently radiate their binding energy and contract, until its energy reaches a minimum. In the absence of interactions with other masses (e.g., the dark matter halo ...
Beyond the Solar System Homework for Geology 8
... 49. Degenerate matter is highly condensed material, where even the electrons of atoms are pushed in, towards the center or nucleus of the atoms. 50. Pulsars are a type of neutron star that spins rapidly and emits pulsating radio waves. 51. A star’s color is based upon the temperature of the star’s s ...
... 49. Degenerate matter is highly condensed material, where even the electrons of atoms are pushed in, towards the center or nucleus of the atoms. 50. Pulsars are a type of neutron star that spins rapidly and emits pulsating radio waves. 51. A star’s color is based upon the temperature of the star’s s ...
January
... A Synopsis for the November 2005 meeting… Distance in Astronomy. At the November meeting Rich Brady gave a presentation on Distance in Astronomy. Except for the probes that have been sent to the planets, astronomers cannot reach out and touch their experiment, which is the universe itself. One of t ...
... A Synopsis for the November 2005 meeting… Distance in Astronomy. At the November meeting Rich Brady gave a presentation on Distance in Astronomy. Except for the probes that have been sent to the planets, astronomers cannot reach out and touch their experiment, which is the universe itself. One of t ...
Ellipticity, Its Origin and Progression in Comoving Galaxies
... regions actually manifests as a non-Platonic, quasi-regular, dodecahedron when "close-packed" as part of an infinite universe. As for the size of these cosmic structures, they are in agreement with astronomical observations [11], viz, approximately 350 million lightyears (Mly) in diameter. Turning o ...
... regions actually manifests as a non-Platonic, quasi-regular, dodecahedron when "close-packed" as part of an infinite universe. As for the size of these cosmic structures, they are in agreement with astronomical observations [11], viz, approximately 350 million lightyears (Mly) in diameter. Turning o ...
Beyond the Solar System Homework for Geology 8
... 48. Degenerate matter is highly condensed material, where even the electrons of atoms are pushed in, towards the center or nucleus of the atoms. 49. Pulsars are a type of neutron star. 50. A star’s color is based upon the temperature of the star’s surface. 51. Although most giant stars are called re ...
... 48. Degenerate matter is highly condensed material, where even the electrons of atoms are pushed in, towards the center or nucleus of the atoms. 49. Pulsars are a type of neutron star. 50. A star’s color is based upon the temperature of the star’s surface. 51. Although most giant stars are called re ...
Stars, Galaxies, and the Universe Section 1
... crossed by dark lines where the color is diminished. ...
... crossed by dark lines where the color is diminished. ...
Stars and Galaxies
... • Mass of massive stars 6x that of sun • Take same path as medium-sized stars except for after red giant stage they do not become white dwarfs • Carbon atoms continue to fuse creating heavier elements like oxygen & nitrogen • Core of massive star so hot that fusion continues until the heavy element ...
... • Mass of massive stars 6x that of sun • Take same path as medium-sized stars except for after red giant stage they do not become white dwarfs • Carbon atoms continue to fuse creating heavier elements like oxygen & nitrogen • Core of massive star so hot that fusion continues until the heavy element ...
Elliptical Galaxies
... obvious symptoms of continuing star formation: no H II regions or young star clusters. They are the simplest galactic systems comprising just a single component, relatively bright in the center but fading rapidly with increasing radius. Elliptical galaxies are found mostly in the denser regions of t ...
... obvious symptoms of continuing star formation: no H II regions or young star clusters. They are the simplest galactic systems comprising just a single component, relatively bright in the center but fading rapidly with increasing radius. Elliptical galaxies are found mostly in the denser regions of t ...
Properties of simulated galaxies at z~4-7
... Extension to lower redshift to test further the interplay between galactic winds & AGN feedback. LAEs at z ~ 3: ANGUS + CRASHα, in collaboration with Akila Jeeson-Daniel (UoM). ...
... Extension to lower redshift to test further the interplay between galactic winds & AGN feedback. LAEs at z ~ 3: ANGUS + CRASHα, in collaboration with Akila Jeeson-Daniel (UoM). ...
Finding the Most Distant Quasars Using Bayesian Selection Methods
... been almost completely ionised, as the first generations of stars—and quasars—emitted sufficient ultraviolet radiation to separate electrons from protons. The rest-frame wavelength of the break is at 0.1216 µm, but the wavelength of all light is increased by the cosmological expansion; the Universe ...
... been almost completely ionised, as the first generations of stars—and quasars—emitted sufficient ultraviolet radiation to separate electrons from protons. The rest-frame wavelength of the break is at 0.1216 µm, but the wavelength of all light is increased by the cosmological expansion; the Universe ...
Investigate Stars and Galaxies - American Museum of Natural History
... 3. Look at the “Organizing the Stars” panel. The HR diagram shows stars organized according to their luminosity (brightness) and temperature. Using the information in the diagram and also in the sections on star type you used in the chart in Step 2, record the following information about each star: ...
... 3. Look at the “Organizing the Stars” panel. The HR diagram shows stars organized according to their luminosity (brightness) and temperature. Using the information in the diagram and also in the sections on star type you used in the chart in Step 2, record the following information about each star: ...
Our Universe - E Natural Health Center
... The Flat Earth In 600 B.C., in the West, the Assyrian Empire had just fallen. At its height, it had extended from Egypt to Babylonia, for an extreme length of 1400 miles. It was soon to be replaced by the Persian Empire, which extended from Cyrenaica to Kashmir, for an extreme length of 3000 miles. ...
... The Flat Earth In 600 B.C., in the West, the Assyrian Empire had just fallen. At its height, it had extended from Egypt to Babylonia, for an extreme length of 1400 miles. It was soon to be replaced by the Persian Empire, which extended from Cyrenaica to Kashmir, for an extreme length of 3000 miles. ...
Gamma Ray Burst Afterglows and Host Galaxies
... radio sources to “twinkle” (like stars seen in visible light through our atmosphere). • Larger sources do not twinkle (like planets). • Measuring the time when an afterglow stops “twinkling” at radio wavelengths reveals its speed of expansion to be near light speed. ...
... radio sources to “twinkle” (like stars seen in visible light through our atmosphere). • Larger sources do not twinkle (like planets). • Measuring the time when an afterglow stops “twinkling” at radio wavelengths reveals its speed of expansion to be near light speed. ...
The Origin and Evolution of Dust in Galaxies
... Bridging local group galaxies to high-z galaxies ...
... Bridging local group galaxies to high-z galaxies ...
Weighing Earth, Sun, & Universe—20 Apr Weighing the Earth • Define a motion
... 3. A planet orbits a star at a radius of 1 AU. One orbit takes ½ of an earth year. The mass of the star is ___ the mass of the sun. ...
... 3. A planet orbits a star at a radius of 1 AU. One orbit takes ½ of an earth year. The mass of the star is ___ the mass of the sun. ...
Introduction Introduction to to Astrophysics Astrophysics
... approximately 120 km/s. Its distance to earth is approximately 2 million lightyears. in how many years from now will we collide based on these figures? However, as this motion is accelerated due to gravitational interaction, the merger will be much sooner. In about 3 billion years, the two galaxies ...
... approximately 120 km/s. Its distance to earth is approximately 2 million lightyears. in how many years from now will we collide based on these figures? However, as this motion is accelerated due to gravitational interaction, the merger will be much sooner. In about 3 billion years, the two galaxies ...
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.