Earth Centered Universe Pro V6.0
... No part of the ECU computer program, documentation, or related files may be copied, reproduced, photocopied, or transmitted except as provided by the license agreements below. “ECU”, “The Earth Centered Universe”, and “Micro-Guider” are trademarks of Nova Astronomics. Other trademarks are the tradem ...
... No part of the ECU computer program, documentation, or related files may be copied, reproduced, photocopied, or transmitted except as provided by the license agreements below. “ECU”, “The Earth Centered Universe”, and “Micro-Guider” are trademarks of Nova Astronomics. Other trademarks are the tradem ...
Astronomy
... approximately 100 and 3200 Å (10 to 320 nm).[33] Light at these wavelengths is absorbed by the Earth's atmosphere, so observations at these wavelengths must be performed from the upper atmosphere or from space. Ultraviolet astronomy is best suited to the study of thermal radiation and spectral emiss ...
... approximately 100 and 3200 Å (10 to 320 nm).[33] Light at these wavelengths is absorbed by the Earth's atmosphere, so observations at these wavelengths must be performed from the upper atmosphere or from space. Ultraviolet astronomy is best suited to the study of thermal radiation and spectral emiss ...
introduction to geodetic astronomy
... the development of models, several major topics are covered, namely celestial coordinate systems and their relationships with terrestrial coordinate systems, variations in the celestial coordinates of a celestial body, time systems, timekeeping, and time dissemination. Finally, the reader should be ...
... the development of models, several major topics are covered, namely celestial coordinate systems and their relationships with terrestrial coordinate systems, variations in the celestial coordinates of a celestial body, time systems, timekeeping, and time dissemination. Finally, the reader should be ...
Astronomy Astrophysics
... The procedure employed for determining the fundamental cluster parameters such as age, reddening, and distance is described in Borissova et al. (2011) and Chené et al. (2012, 2013). As described in Borissova et al. (2011), we used the field-star decontamination algorithm of Bonatto & Bica (2010), wh ...
... The procedure employed for determining the fundamental cluster parameters such as age, reddening, and distance is described in Borissova et al. (2011) and Chené et al. (2012, 2013). As described in Borissova et al. (2011), we used the field-star decontamination algorithm of Bonatto & Bica (2010), wh ...
Giant star seismology
... Observations of pulsators which display large (photometric) variations have been ongoing ever since. These stars include among others, Cepheids, high amplitude δ Scuti stars, RR Lyrae stars, white dwarfs and Mira’s. An early result for which asteroseismic observations and stellar modelling were inco ...
... Observations of pulsators which display large (photometric) variations have been ongoing ever since. These stars include among others, Cepheids, high amplitude δ Scuti stars, RR Lyrae stars, white dwarfs and Mira’s. An early result for which asteroseismic observations and stellar modelling were inco ...
The correlation between galaxy morphology and star
... et al. 2010; Cassata et al. 2010). The number density of these galaxies rapidly increases, by a factor of five, from z ∼ 2 to z ∼ 1, and they are up to 5 times more compact in size than local ones with similar mass (Cassata et al. 2011, 2013). Recent works have suggested, however, that a large fract ...
... et al. 2010; Cassata et al. 2010). The number density of these galaxies rapidly increases, by a factor of five, from z ∼ 2 to z ∼ 1, and they are up to 5 times more compact in size than local ones with similar mass (Cassata et al. 2011, 2013). Recent works have suggested, however, that a large fract ...
Spitzer Spectroscopy of Circumstellar Disks in the 5 Myr Old Upper
... burning limit are surrounded by optically thick disks of gas and dust, the progenitors of planetary systems. Early ground-based infrared (JHKLN −band) observations established that the inner disks (≪ 1.0 AU) around most stars have dispersed by an age of ∼10 Myr (Haisch et al. 2001; Mamajek et al. 20 ...
... burning limit are surrounded by optically thick disks of gas and dust, the progenitors of planetary systems. Early ground-based infrared (JHKLN −band) observations established that the inner disks (≪ 1.0 AU) around most stars have dispersed by an age of ∼10 Myr (Haisch et al. 2001; Mamajek et al. 20 ...
The evolution of low-metallicity massive stars - Argelander
... Stars are isolated gas-spheres in outer space, bound together by gravity, radiating away light released by nuclear fusion. But their story is not that simple, as anyone who looks through a telescope would soon figure out. Because there are stars in the dark spots of the sky, too faint for the naked ...
... Stars are isolated gas-spheres in outer space, bound together by gravity, radiating away light released by nuclear fusion. But their story is not that simple, as anyone who looks through a telescope would soon figure out. Because there are stars in the dark spots of the sky, too faint for the naked ...
probing quasar environments with tunable filter
... During this project, I have benefited enormously from the input of not just one but two supervisors. First, many thanks are due to Joanne Baker for getting the whole thing started. Isobel Hook was generous (or foolish!) enough to take over part of the way through: her insights and advice were invalu ...
... During this project, I have benefited enormously from the input of not just one but two supervisors. First, many thanks are due to Joanne Baker for getting the whole thing started. Isobel Hook was generous (or foolish!) enough to take over part of the way through: her insights and advice were invalu ...
The visibility of Lyman Alpha Emitters: constraining reionization
... number of physical effects. First, the intrinsic Lyα luminosity depends on the total number of H I ionizing photons that are produced by a galaxy, depending on the star formation rate (SFR), age and metallicity of its stellar population (e.g. Santos 2004). Second, depending on the H I and dust conte ...
... number of physical effects. First, the intrinsic Lyα luminosity depends on the total number of H I ionizing photons that are produced by a galaxy, depending on the star formation rate (SFR), age and metallicity of its stellar population (e.g. Santos 2004). Second, depending on the H I and dust conte ...
Clusters: age scales for stellar physics
... In order to define an age scale (or several), it is very important to keep in mind that we cannot make experiments except in very few situations and we rely on observations and theory. Thus, observational phenomena with very well defined ages, our anchors, are extremely important. As a matter of fac ...
... In order to define an age scale (or several), it is very important to keep in mind that we cannot make experiments except in very few situations and we rely on observations and theory. Thus, observational phenomena with very well defined ages, our anchors, are extremely important. As a matter of fac ...
STARLAB
... you told the first time. If time allows, show the Earth Cylinder or other cylinders. Try some activities from your Planetarium Activities for Student Success (PASS) volumes. (Did you send in your Product Registration form? See Note.) 6. It’s important that the students realize that you are learning ...
... you told the first time. If time allows, show the Earth Cylinder or other cylinders. Try some activities from your Planetarium Activities for Student Success (PASS) volumes. (Did you send in your Product Registration form? See Note.) 6. It’s important that the students realize that you are learning ...
Understanding Variable Stars - Central Florida Astronomical Society
... Probing the mysterious heart of the Crab Nebula, the tattered remains of an exploding star, astronomers have found this object to be even more dynamic than previously understood 99 The periods of pulsars, plotted against the rate of period change 101 Schematic picture of a simple eclipsing binary, a ...
... Probing the mysterious heart of the Crab Nebula, the tattered remains of an exploding star, astronomers have found this object to be even more dynamic than previously understood 99 The periods of pulsars, plotted against the rate of period change 101 Schematic picture of a simple eclipsing binary, a ...
Comet Kirch in Art and Astronomy
... Descriptions Made by Witnesses and Explorers The Kirch Comet is one of the brightest comets during the 17th century, visible even during the day. Because of this, many stories were preserved by its spectators and observers. In America it caused an unusual stir. Here is an extract of the book “Histor ...
... Descriptions Made by Witnesses and Explorers The Kirch Comet is one of the brightest comets during the 17th century, visible even during the day. Because of this, many stories were preserved by its spectators and observers. In America it caused an unusual stir. Here is an extract of the book “Histor ...
act_science_bellringers
... 24. H—“ Gravity causes part of a cloud of gas and dust to collapse and heat up”; gravitational force is the only one mentioned in the passage. 25. B—“ hydrogen to make helium in a shell surrounding its center.” This answer comes straight from the passage, and the question directs you to find the ans ...
... 24. H—“ Gravity causes part of a cloud of gas and dust to collapse and heat up”; gravitational force is the only one mentioned in the passage. 25. B—“ hydrogen to make helium in a shell surrounding its center.” This answer comes straight from the passage, and the question directs you to find the ans ...
Ursa Major
Ursa Major /ˈɜrsə ˈmeɪdʒər/ (also known as the Great Bear and Charles' Wain) is a constellation in the northern celestial hemisphere. One of the 48 constellations listed by Ptolemy (second century AD), it remains one of the 88 modern constellations. It can be visible throughout the year in most of the northern hemisphere. Its name, Latin for ""the greater (or larger) she-bear"", stands as a reference to and in direct contrast with Ursa Minor, ""the smaller she-bear"", with which it is frequently associated in mythology and amateur astronomy. The constellation's most recognizable asterism, a group of seven relatively bright stars commonly known as the ""Big Dipper"", ""the Wagon"" or ""the Plough"" (among others), both mimicks the shape of the lesser bear (the ""Little Dipper"") and is commonly used as a navigational pointer towards the current northern pole star, Polaris in Ursa Minor. The Big Dipper and the constellation as a whole have mythological significance in numerous world cultures, usually as a symbol of the north.The third largest constellation in the sky, Ursa Major is home to many deep-sky objects including seven Messier objects, four other NGC objects and I Zwicky 18, the youngest known galaxy in the visible universe.