Video Lesson Information Astronomy: Observations & Theories Astronomy 1
... Astronomers are the only scientists who do not manipulate the objects they study. Instead, they do two basic things: collect light and analyze it. Accordingly, this lesson answers two basic questions: (1) What is light? and (2) What tools are used to collect it? Lesson 6 - The Science of Starlight S ...
... Astronomers are the only scientists who do not manipulate the objects they study. Instead, they do two basic things: collect light and analyze it. Accordingly, this lesson answers two basic questions: (1) What is light? and (2) What tools are used to collect it? Lesson 6 - The Science of Starlight S ...
The Spectra ot Novae
... measure of the ejection that continues after the "main burst", and perhaps it is simply this continuing activity that sustains the brightness of the star for so long a time. 6. CYCLIC VARIATIONS OF SPECTRA The most interesting of all deviations from the regular course are those connected with second ...
... measure of the ejection that continues after the "main burst", and perhaps it is simply this continuing activity that sustains the brightness of the star for so long a time. 6. CYCLIC VARIATIONS OF SPECTRA The most interesting of all deviations from the regular course are those connected with second ...
What are Messier Objects? - Bowling Green State University
... http://www.maa.clell.de/Messier/E/m066.html http://www.maa.clell.de/Messier/E/m067.html http://www.maa.clell.de/Messier/E/m081.html http://www.maa.clell.de/Messier/E/m082.html http://www.maa.clell.de/Messier/E/m094.html http://www.maa.clell.de/Messier/E/m095.html http://www.maa.clell.de/Messier/E/m0 ...
... http://www.maa.clell.de/Messier/E/m066.html http://www.maa.clell.de/Messier/E/m067.html http://www.maa.clell.de/Messier/E/m081.html http://www.maa.clell.de/Messier/E/m082.html http://www.maa.clell.de/Messier/E/m094.html http://www.maa.clell.de/Messier/E/m095.html http://www.maa.clell.de/Messier/E/m0 ...
Surface Gravity as a Diagnostic ... Youth Cameron Higby-Naquin Advisor: Eric Jensen
... stars that are still forming. The study of the evolutionary stages that span a star's youth has been a very active field since the discovery of the first recognizably pre-main-sequence (PMS) stars by Joy in the 1940's. Astronomers created a class of variable stars called T Tauri Stars (TTS) when the ...
... stars that are still forming. The study of the evolutionary stages that span a star's youth has been a very active field since the discovery of the first recognizably pre-main-sequence (PMS) stars by Joy in the 1940's. Astronomers created a class of variable stars called T Tauri Stars (TTS) when the ...
Shortв•`lived radioactivity in the early solar system: The Superв•`AGB
... C + 12C reactions. All these processes and quantities are still subject to severe uncertainties, although much effort is currently employed to provide more precise estimates of the reaction rates mentioned above (e.g., Strieder 2010; Zickefoose et al. 2010; Schürmann et al. 2011, 2012). Currently t ...
... C + 12C reactions. All these processes and quantities are still subject to severe uncertainties, although much effort is currently employed to provide more precise estimates of the reaction rates mentioned above (e.g., Strieder 2010; Zickefoose et al. 2010; Schürmann et al. 2011, 2012). Currently t ...
USRA - MSU Solar Physics
... the distance scale of these explosions. Paczynski was convinced of their cosmological origins while Lamb, and most of the astronomical community, insisted that they were linked to the Milky Way and its local surroundings. The argument in favor of extragalactic distances was largely based on the rand ...
... the distance scale of these explosions. Paczynski was convinced of their cosmological origins while Lamb, and most of the astronomical community, insisted that they were linked to the Milky Way and its local surroundings. The argument in favor of extragalactic distances was largely based on the rand ...
exemplars and commentary
... .Barnard’s star was thought to have no flares, due to its age, but one was observed in 2011. The significance of Red Dwarfs to astronomy. Although intelligent life formed around a “G” star for us astronomers think that life will most likely be found around a Red Dwarf. Primarily because their energy ...
... .Barnard’s star was thought to have no flares, due to its age, but one was observed in 2011. The significance of Red Dwarfs to astronomy. Although intelligent life formed around a “G” star for us astronomers think that life will most likely be found around a Red Dwarf. Primarily because their energy ...
Chromospherically young, kinematically old stars
... really peculiar objects, and not just stars having a component velocity in the tail of the distribution. Some CYKOS also appear clearly in an age–velocity diagram, so that, in principle, this diagram could also be used to identify them. However, the uncertainty in the chromospheric ages can make som ...
... really peculiar objects, and not just stars having a component velocity in the tail of the distribution. Some CYKOS also appear clearly in an age–velocity diagram, so that, in principle, this diagram could also be used to identify them. However, the uncertainty in the chromospheric ages can make som ...
Star Clusters - Caltech Astronomy
... since open clusters are found near the Galactic plane where the interstellar dust is the most opaque. There may be as many as 105 open clusters in the Galaxy. The smallest of the open clusters contain fewer than a dozen stars, so the minimum mass for an open cluster is about 10 M . At the other ext ...
... since open clusters are found near the Galactic plane where the interstellar dust is the most opaque. There may be as many as 105 open clusters in the Galaxy. The smallest of the open clusters contain fewer than a dozen stars, so the minimum mass for an open cluster is about 10 M . At the other ext ...
in search of antimatter in the universe
... Because the electron and positron are so close together in Positronium, it is only a (very short) matter of time before they annihilate4. When para-Positronium annihilates, it releases two gamma ray photons that have a characteristic energy of 511 keV. One method of detecting Positronium is by detec ...
... Because the electron and positron are so close together in Positronium, it is only a (very short) matter of time before they annihilate4. When para-Positronium annihilates, it releases two gamma ray photons that have a characteristic energy of 511 keV. One method of detecting Positronium is by detec ...
Star Clusters in Mergers
... The small-scale velocity dispersion between clusters is remarkably quiescent (e.g, ~ 10 km/sec), indicating that high-velocity cloud-cloud collisions are not the triggering mechanism for cluster formation. ...
... The small-scale velocity dispersion between clusters is remarkably quiescent (e.g, ~ 10 km/sec), indicating that high-velocity cloud-cloud collisions are not the triggering mechanism for cluster formation. ...
Determination of kinetic energies of stars using Hipparcos data *
... larger proper motions than the stars of early spectral types. There is a good deal of different hypotheses that aim to explain this phenomenon. One of them asserts that the late type stars have smaller masses, which is why their velocities are larger. The theoretical base for this statement can be f ...
... larger proper motions than the stars of early spectral types. There is a good deal of different hypotheses that aim to explain this phenomenon. One of them asserts that the late type stars have smaller masses, which is why their velocities are larger. The theoretical base for this statement can be f ...
A Star - Cloudy Nights
... All the stars you can see without a telescope, including our Sun, are located in the same spiral arm of the Milky Way galaxy. Even though these stars are our neighbors, we can't visit them. They are too far away. Using current technology, it would take thousands of years to travel to our closest ste ...
... All the stars you can see without a telescope, including our Sun, are located in the same spiral arm of the Milky Way galaxy. Even though these stars are our neighbors, we can't visit them. They are too far away. Using current technology, it would take thousands of years to travel to our closest ste ...
Stellar Evolution Task
... Red giants are sooo large that we can actually 'see' their size. Sadly we have to use very special techniques and can't just look through a very large telescope. Many bright red stars we see in the sky are red giants. ...
... Red giants are sooo large that we can actually 'see' their size. Sadly we have to use very special techniques and can't just look through a very large telescope. Many bright red stars we see in the sky are red giants. ...
White dwarfs from GAIA: The 7th dimension
... • The white dwarf luminosity function of Gaia is a sensitive probe of the averaged star formation rate • Due to their very short main-sequence lifetimes the shape of the SFR can be reconstructed from the luminosity function of massive white dwarfs • To achieve these goals, we need R~5000 spectroscop ...
... • The white dwarf luminosity function of Gaia is a sensitive probe of the averaged star formation rate • Due to their very short main-sequence lifetimes the shape of the SFR can be reconstructed from the luminosity function of massive white dwarfs • To achieve these goals, we need R~5000 spectroscop ...
Document
... Black holes are formed from There should be about several tens very massive stars of million isolated BHs in the Galaxy It is very difficult to see an isolated black hole: Microlensing ...
... Black holes are formed from There should be about several tens very massive stars of million isolated BHs in the Galaxy It is very difficult to see an isolated black hole: Microlensing ...
Precision age indicators that exploit chemically peculiar stars
... still of great value, blue photometric colors generally indicate galaxies with ongoing star formation, while red colors indicate galaxies that have not formed significant numbers of stars in the last few hundred million years. A technique that often gives higher precision is using Balmer feature str ...
... still of great value, blue photometric colors generally indicate galaxies with ongoing star formation, while red colors indicate galaxies that have not formed significant numbers of stars in the last few hundred million years. A technique that often gives higher precision is using Balmer feature str ...
Stellar Spectroscopy
... Spectroscopy is the study of “what kinds” of light we see from an object. It is a measure of the quantity of each color of light (or more specifically, the amount of each wavelength of light). It is a powerful tool in astronomy. In fact, most of what we know in astronomy is a result of spectroscopy: ...
... Spectroscopy is the study of “what kinds” of light we see from an object. It is a measure of the quantity of each color of light (or more specifically, the amount of each wavelength of light). It is a powerful tool in astronomy. In fact, most of what we know in astronomy is a result of spectroscopy: ...
Cygnus (constellation)
Cygnus /ˈsɪɡnəs/ is a northern constellation lying on the plane of the Milky Way, deriving its name from the Latinized Greek word for swan. The swan is one of the most recognizable constellations of the northern summer and autumn, it features a prominent asterism known as the Northern Cross (in contrast to the Southern Cross). Cygnus was among the 48 constellations listed by the 2nd century astronomer Ptolemy, and it remains one of the 88 modern constellations.Cygnus contains Deneb, one of the brightest stars in the night sky and one corner of the Summer Triangle, as well as some notable X-ray sources and the giant stellar association of Cygnus OB2. One of the stars of this association, NML Cygni, is one of the largest stars currently known. The constellation is also home to Cygnus X-1, a distant X-ray binary containing a supergiant and unseen massive companion that was the first object widely held to be a black hole. Many star systems in Cygnus have known planets as a result of the Kepler Mission observing one patch of the sky, the patch is the area around Cygnus. In addition, most of the eastern part of Cygnus is dominated by the Hercules–Corona Borealis Great Wall, a giant galaxy filament that is the largest known structure in the observable universe; covering most of the northern sky.