A Comparison of CCD Images Taken with Different Cameras Abstract
... Step 3: Through a high speed stellar wind and mild eruptions, the red giant throws off its outer layers which expand outward. The gas in this expanding cloud is ionized by the central star and gives off its own light. The cloud is seen from Earth in one of a variety of shapes taken on by planetary ...
... Step 3: Through a high speed stellar wind and mild eruptions, the red giant throws off its outer layers which expand outward. The gas in this expanding cloud is ionized by the central star and gives off its own light. The cloud is seen from Earth in one of a variety of shapes taken on by planetary ...
Power Point Presentation
... Often called dwarfs (but not the same as White Dwarfs) because they are smaller than giants or supergiants Our sun is considered a G2V star. It has been on the main sequence for about 4.5 billion years, with another ~5 billion to go ...
... Often called dwarfs (but not the same as White Dwarfs) because they are smaller than giants or supergiants Our sun is considered a G2V star. It has been on the main sequence for about 4.5 billion years, with another ~5 billion to go ...
SRMP Stars Curriculum - American Museum of Natural History
... star’s name, spectral type, apparent and absolute magnitudes, and effective temperature. Working in groups of 2 – 4, students should use the magnitudes to determine the distances to each star and plot it onto graph paper. Distribute the graph paper, so that alternate groups get the logarithmic dista ...
... star’s name, spectral type, apparent and absolute magnitudes, and effective temperature. Working in groups of 2 – 4, students should use the magnitudes to determine the distances to each star and plot it onto graph paper. Distribute the graph paper, so that alternate groups get the logarithmic dista ...
The High Resolution Camera CXC Newsletter
... X-ray emitting shocks form. On the other end to the main sequence are the cool stars that produce X-ray emission in a magnetically heated corona like our sun. Stars of spectral type A lie between these regimes and should be X-ray dark. Yet, some of them have been detected in X-ray observations. One ...
... X-ray emitting shocks form. On the other end to the main sequence are the cool stars that produce X-ray emission in a magnetically heated corona like our sun. Stars of spectral type A lie between these regimes and should be X-ray dark. Yet, some of them have been detected in X-ray observations. One ...
5 - White Dwarfs - University of Texas Astronomy
... dwarf leading to an increase in the frictional heating and the light output in the process. Detailed studies suggest that the disk-heating instability described in Chapter 4 (see Figure 4.5) is the primary cause of dwarf novae. Matter piles up in the disk in a cool, dim storage phase until the disk ...
... dwarf leading to an increase in the frictional heating and the light output in the process. Detailed studies suggest that the disk-heating instability described in Chapter 4 (see Figure 4.5) is the primary cause of dwarf novae. Matter piles up in the disk in a cool, dim storage phase until the disk ...
here - Diana`s Fixed Stars
... the tsunami on Dec. 26, 2004, Cetus was anticulminating – it was the Antivertex, IC and North Node. In the Winter Solstice chart for Banda Aceh, Indonesia (5N34, 95E20), just five days earlier, Cetus had been culminating with Vertex, MC, North Node and Moon. This is also the Ingress chart – Sun ente ...
... the tsunami on Dec. 26, 2004, Cetus was anticulminating – it was the Antivertex, IC and North Node. In the Winter Solstice chart for Banda Aceh, Indonesia (5N34, 95E20), just five days earlier, Cetus had been culminating with Vertex, MC, North Node and Moon. This is also the Ingress chart – Sun ente ...
Sample pages 1 PDF
... as our observations cannot penetrate the opaque core where all this interesting nuclear physics is occurring. Therefore, most AGB stars are classified as M, R, N or S, designations that have mostly been replaced by a collective term C, or “carbon stars.” Such stars have an abundance of carbon or oxyg ...
... as our observations cannot penetrate the opaque core where all this interesting nuclear physics is occurring. Therefore, most AGB stars are classified as M, R, N or S, designations that have mostly been replaced by a collective term C, or “carbon stars.” Such stars have an abundance of carbon or oxyg ...
Word version of Episode 704
... Finding the Andromeda galaxy M31 The Andromeda galaxy M31 can just, but only just, be seen with the naked eye. Its light, 2 million years old, is the oldest light you can see with the unaided eye. The Andromeda galaxy, M31, is the nearest neighbour large galaxy to our own Galaxy, the Milky Way. It i ...
... Finding the Andromeda galaxy M31 The Andromeda galaxy M31 can just, but only just, be seen with the naked eye. Its light, 2 million years old, is the oldest light you can see with the unaided eye. The Andromeda galaxy, M31, is the nearest neighbour large galaxy to our own Galaxy, the Milky Way. It i ...
to - NexStar Resource Site
... Nebula in the night sky it is almost certainly the easiest Nebula to observe with any size optical instrument. It can also be spotted with the naked eye as a small fuzzy patch below Orions Belt. The Orion Nebula is about 1500 light years distant, located in the same spiral arm of our Galaxy as the S ...
... Nebula in the night sky it is almost certainly the easiest Nebula to observe with any size optical instrument. It can also be spotted with the naked eye as a small fuzzy patch below Orions Belt. The Orion Nebula is about 1500 light years distant, located in the same spiral arm of our Galaxy as the S ...
The Milky Way Galaxy
... the total amount of dark matter determines the fate of our Universe the Earth would be destroyed if it ever ran into a clump of cold dark matter dark matter is responsible for the formation of structure in our Universe our understanding of dark matter may reveal a new, undiscovered form of matter ...
... the total amount of dark matter determines the fate of our Universe the Earth would be destroyed if it ever ran into a clump of cold dark matter dark matter is responsible for the formation of structure in our Universe our understanding of dark matter may reveal a new, undiscovered form of matter ...
identifying seasonal stars in kaurna astronomical traditions
... Assuming the observer is at sea-level, looking towards an unobstructed horizon in very good seeing conditions, a first magnitude star needs to have a minimum altitude of 5° to be visible (ibid.). Otherwise, extinction of the star‘s light is too great. The Sun needs to have a maximum altitude of −10° ...
... Assuming the observer is at sea-level, looking towards an unobstructed horizon in very good seeing conditions, a first magnitude star needs to have a minimum altitude of 5° to be visible (ibid.). Otherwise, extinction of the star‘s light is too great. The Sun needs to have a maximum altitude of −10° ...
Sample pages 1 PDF
... An attentive observer will soon notice that individual bright stars that are rather close together in the sky seem to form simple geometric shapes – squares, rhombuses, crosses, circles, arches. Giving a name to these shapes in the sky makes them more familiar to you and easier to locate again. That ...
... An attentive observer will soon notice that individual bright stars that are rather close together in the sky seem to form simple geometric shapes – squares, rhombuses, crosses, circles, arches. Giving a name to these shapes in the sky makes them more familiar to you and easier to locate again. That ...
Our galaxy - School of Physics
... width is hard to define because it does not have sharp boundaries. Stars like the Sun lie within 500 pc above and below the central plane; the youngest stars lie within 50 pc. ...
... width is hard to define because it does not have sharp boundaries. Stars like the Sun lie within 500 pc above and below the central plane; the youngest stars lie within 50 pc. ...
Autoguiding - Thrush Observatory
... no more difficult or complicated than using an off-axis guider if one follows a few simple rules. • The most fundamental mistake is to attempt to mount the guide scope directly to the primary tube. A guide scope is just too heavy and will bend the main tube in all sorts of random ways when in use. • ...
... no more difficult or complicated than using an off-axis guider if one follows a few simple rules. • The most fundamental mistake is to attempt to mount the guide scope directly to the primary tube. A guide scope is just too heavy and will bend the main tube in all sorts of random ways when in use. • ...
Part IV: Stars
... Instructor Guide for The Essential Cosmic Perspective, Sixth Edition 140 Sun is yellow, they can have trouble with the idea that the Sun would look nearly white if they were not seeing it through Earth’s atmosphere. However, when astronomers speak of “white stars,” they are usually talking about st ...
... Instructor Guide for The Essential Cosmic Perspective, Sixth Edition 140 Sun is yellow, they can have trouble with the idea that the Sun would look nearly white if they were not seeing it through Earth’s atmosphere. However, when astronomers speak of “white stars,” they are usually talking about st ...
sections 7-8 instructor notes
... A-type stars is atomic hydrogen, which makes its presence obvious in the flux distributions of such stars with discrete discontinuities in the stellar continua at λ912Å (the Lyman discontinuity), λ3647Å (the Balmer discontinuity), and λ8206Å (the Paschen discontinuity). The primary opacity source in ...
... A-type stars is atomic hydrogen, which makes its presence obvious in the flux distributions of such stars with discrete discontinuities in the stellar continua at λ912Å (the Lyman discontinuity), λ3647Å (the Balmer discontinuity), and λ8206Å (the Paschen discontinuity). The primary opacity source in ...
July - Rose City Astronomers
... much dependent upon world wide amateur contributors to report the necessary data to the 94 year old AAVSO organization to help them better understand the physical properties, distance and evolution of different types of stars (there are several other groups around the world that also collect this da ...
... much dependent upon world wide amateur contributors to report the necessary data to the 94 year old AAVSO organization to help them better understand the physical properties, distance and evolution of different types of stars (there are several other groups around the world that also collect this da ...
The Life of the Sun
... Pamela: This is because you have a much larger surface area that the light is going through. Each bit of that surface area is able to radiate away Photons and all those Photons add up to being a much brighter Star. Fraser: So even though the Sun is changed to red, it’s now visible from a much furth ...
... Pamela: This is because you have a much larger surface area that the light is going through. Each bit of that surface area is able to radiate away Photons and all those Photons add up to being a much brighter Star. Fraser: So even though the Sun is changed to red, it’s now visible from a much furth ...
Quasars- The Brightest Black Holes
... redshift meant that either the star was close, but escaping out our galaxy at a ridiculously high speed; or that like the distant galaxies at such a redshift, it was moving away from us as part of the universal cosmological expansion. The latter explanation seemed (marginally) the less bizarre, but ...
... redshift meant that either the star was close, but escaping out our galaxy at a ridiculously high speed; or that like the distant galaxies at such a redshift, it was moving away from us as part of the universal cosmological expansion. The latter explanation seemed (marginally) the less bizarre, but ...
Ch 13 Death of Stars(4-5?-13)
... stops the collapse and produces an object so compact that escape velocity is higher than speed of light; hence, not even light can escape. •NOTE: these are the masses of the dead stars NOT the masses they had when they were on the main sequence ...
... stops the collapse and produces an object so compact that escape velocity is higher than speed of light; hence, not even light can escape. •NOTE: these are the masses of the dead stars NOT the masses they had when they were on the main sequence ...
It is now recognized that the vast majority of ellipticals are of
... • The dust lanes seen in E galaxies imply that the absorbing material is distributed in rings or disks. Dust lanes may be aligned with either the major or minor axes, or they may be warped. • E galaxies contain modest amounts of cool and warm gas, although not as much as is found in S galaxies. A fe ...
... • The dust lanes seen in E galaxies imply that the absorbing material is distributed in rings or disks. Dust lanes may be aligned with either the major or minor axes, or they may be warped. • E galaxies contain modest amounts of cool and warm gas, although not as much as is found in S galaxies. A fe ...
Ch. 13 Death of Stars(11-16-10)-3
... stops the collapse and produces an object so compact that escape velocity is higher than speed of light; hence, not even light can escape. •NOTE: these are the masses of the dead stars NOT the masses they had when they were on the main sequence ...
... stops the collapse and produces an object so compact that escape velocity is higher than speed of light; hence, not even light can escape. •NOTE: these are the masses of the dead stars NOT the masses they had when they were on the main sequence ...
![Cosmic variance in [O/Fe] in the Galactic disk](http://s1.studyres.com/store/data/014331057_1-996ec6eddf93071c5e835624d4620c7e-300x300.png)
Cosmic variance in [O/Fe] in the Galactic disk
... errors in abundance measurements are often underestimated because it is difficult to account for all relevant contributions. For this reason, we did not attempt to calculate the uncertainties in the oxygen abundances, but instead derived them empirically. Thanks to the wide sky coverage of the APOGE ...
... errors in abundance measurements are often underestimated because it is difficult to account for all relevant contributions. For this reason, we did not attempt to calculate the uncertainties in the oxygen abundances, but instead derived them empirically. Thanks to the wide sky coverage of the APOGE ...
Perseus (constellation)
Perseus, named after the Greek mythological hero Perseus, is a constellation in the northern sky. It was one of 48 listed by the 2nd-century astronomer Ptolemy and among the 88 modern constellations defined by the International Astronomical Union (IAU). It is located in the northern celestial hemisphere near several other constellations named after legends surrounding Perseus, including Andromeda to the west and Cassiopeia to the north. Perseus is also bordered by Aries and Taurus to the south, Auriga to the east, Camelopardalis to the north, and Triangulum to the west.The galactic plane of the Milky Way passes through Perseus but is mostly obscured by molecular clouds. The constellation's brightest star is the yellow-white supergiant Alpha Persei (also called Mirfak), which shines at magnitude 1.79. It and many of the surrounding stars are members of an open cluster known as the Alpha Persei Cluster. The best-known star, however, is Algol (Beta Persei), linked with ominous legends because of its variability, which is noticeable to the naked eye. Rather than being an intrinsically variable star, it is an eclipsing binary. Other notable star systems in Perseus include X Persei, a binary system containing a neutron star, and GK Persei, a nova that peaked at magnitude 0.2 in 1901. The Double Cluster, comprising two open clusters quite near each other in the sky, was known to the ancient Chinese. The constellation gives its name to the Perseus Cluster (Abell 426), a massive galaxy cluster located 250 million light-years from Earth. It hosts the radiant of the annual Perseids meteor shower—one of the most prominent meteor showers in the sky.