Stellar Populations of Galaxies- 2 Lectures H
... "hot" opaque bodies emits a continuous spectra. "hot" low density gas emits a sequence of emission lines. - a neon sign. "cold" low density gas, placed in front of a hot opaque body, produces a continuous spectrum with dark lines on top ( absorption lines). light from the sun. Every element (Hydroge ...
... "hot" opaque bodies emits a continuous spectra. "hot" low density gas emits a sequence of emission lines. - a neon sign. "cold" low density gas, placed in front of a hot opaque body, produces a continuous spectrum with dark lines on top ( absorption lines). light from the sun. Every element (Hydroge ...
Stars - Red, Blue, Old, New pt.4
... • Observed pulsations in radio waves 33 times a second. • Pulsations occur at all wavelengths--optical, X-ray, etc. • What could it be? ...
... • Observed pulsations in radio waves 33 times a second. • Pulsations occur at all wavelengths--optical, X-ray, etc. • What could it be? ...
Study Guide for the Comprehensive Final Exam
... any latitude. 10. Draw the apparent motion of stars as seen by any observer looking North, East, South or West at any location in the northern hemisphere. 11. Define a constellation and distinguish it from an asterism. 12. Use celestial coordinates of Right Ascension and Declination appropriately in ...
... any latitude. 10. Draw the apparent motion of stars as seen by any observer looking North, East, South or West at any location in the northern hemisphere. 11. Define a constellation and distinguish it from an asterism. 12. Use celestial coordinates of Right Ascension and Declination appropriately in ...
A Spyglass Telescope
... prominent against the star field. The brightest member, a reddish magnitude 7.9 star (HD 180021), is situated on the eastern side Only 25 arc minutes towards the west, the el- of the grouping with several members, sprayliptical galaxy NGC 6861 occupies the mid- ing out into the northern extremity. d ...
... prominent against the star field. The brightest member, a reddish magnitude 7.9 star (HD 180021), is situated on the eastern side Only 25 arc minutes towards the west, the el- of the grouping with several members, sprayliptical galaxy NGC 6861 occupies the mid- ing out into the northern extremity. d ...
Magnitudes lesson plan
... that he could see from his latitude into six classes of brightness. His idea of six classes probably came from the Babylonians whose base number was six. The formal introduction of six magnitudes has been credited to Ptolemy (100-150 A.D.) who was a Greek/Egyptian astronomer. He simply advanced the ...
... that he could see from his latitude into six classes of brightness. His idea of six classes probably came from the Babylonians whose base number was six. The formal introduction of six magnitudes has been credited to Ptolemy (100-150 A.D.) who was a Greek/Egyptian astronomer. He simply advanced the ...
Define the following terms in the space provided
... they never dip below the horizon during their diurnal cycle. These are stars that never set below the horizon because they are closer to Polaris than Polaris is top the horizon. The number of circumpolar stars, or the size of the circumpolar region, depends on an observer’s latitude. The number of c ...
... they never dip below the horizon during their diurnal cycle. These are stars that never set below the horizon because they are closer to Polaris than Polaris is top the horizon. The number of circumpolar stars, or the size of the circumpolar region, depends on an observer’s latitude. The number of c ...
Flatfielding chapter for Calibration Volumes
... Similar high precision high frequency flat fields can be obtained by dithering well-characterized calibration stars over the focal plane. But the large number of pixels on the SNAP focal plane, roughly half a billion, makes this approach very costly in time. There are also other significant advantag ...
... Similar high precision high frequency flat fields can be obtained by dithering well-characterized calibration stars over the focal plane. But the large number of pixels on the SNAP focal plane, roughly half a billion, makes this approach very costly in time. There are also other significant advantag ...
A Hero`s Little Horse: Discovery of a Dissolving Star Cluster in
... centre of mass calculated in terms of the normalised signals on the array into which the stars were binned and smoothed as described in Section 2. We derive an ellipticity = 0.42 ± 0.10 and a position angle θ = −59 ± 6 deg by using the fit bivariate normal function of the astroML package (VanderPl ...
... centre of mass calculated in terms of the normalised signals on the array into which the stars were binned and smoothed as described in Section 2. We derive an ellipticity = 0.42 ± 0.10 and a position angle θ = −59 ± 6 deg by using the fit bivariate normal function of the astroML package (VanderPl ...
Transcript of lecture I
... In the written word one does not have a specific audience unless one is writing a letter or something like that. The audience for writing is abstract and the writer is writing to the world at large. In such a situation the writer must anticipate a general audience instead intuitively sensing a real ...
... In the written word one does not have a specific audience unless one is writing a letter or something like that. The audience for writing is abstract and the writer is writing to the world at large. In such a situation the writer must anticipate a general audience instead intuitively sensing a real ...
Supernovae – the biggest bangs since the Big Bang
... it becomes more than 40 percent “heavier” than the Sun, it will make a huge explosion. The entire white dwarf will explode with the energy of four billion Suns. This is called a “white dwarf supernova” (also known as a “Type Ia supernova”). Imagine you made a series of bombs, each with the same am ...
... it becomes more than 40 percent “heavier” than the Sun, it will make a huge explosion. The entire white dwarf will explode with the energy of four billion Suns. This is called a “white dwarf supernova” (also known as a “Type Ia supernova”). Imagine you made a series of bombs, each with the same am ...
The Night Sky May 2016 - Bridgend Astronomical Society
... The constellation Leo is now in the south-eastern sky in the evening. One of the few constellations that genuinely resembles its name, it looks likes one of the Lions in Trafalgar Square, with its mane and head forming an arc (called the Sickle) to the upper right, with Regulus in the position of it ...
... The constellation Leo is now in the south-eastern sky in the evening. One of the few constellations that genuinely resembles its name, it looks likes one of the Lions in Trafalgar Square, with its mane and head forming an arc (called the Sickle) to the upper right, with Regulus in the position of it ...
Herschel
... Herschel related the stratospheric water in Jupiter with the SL9 impacts In July 1994 at least 21 fragments of the comet Shoemaker-Levy 9 impacted on Jupiter. The water vapour observed in Jupiter by Herschel has been related with those impacts (Cavalié et al. 2013). The PACS maps provide the coverin ...
... Herschel related the stratospheric water in Jupiter with the SL9 impacts In July 1994 at least 21 fragments of the comet Shoemaker-Levy 9 impacted on Jupiter. The water vapour observed in Jupiter by Herschel has been related with those impacts (Cavalié et al. 2013). The PACS maps provide the coverin ...
The Significance of Mega Stars
... conjunction in longitude, with the Sun crossing the Deneb meridian at the time of the miracle. Just as there are meridians—lines of energy flow—in the human being, these meridians exist also in the greater cosmos of the macrocosm. As may be understood from the law of correspondences “as above, so be ...
... conjunction in longitude, with the Sun crossing the Deneb meridian at the time of the miracle. Just as there are meridians—lines of energy flow—in the human being, these meridians exist also in the greater cosmos of the macrocosm. As may be understood from the law of correspondences “as above, so be ...
laboratory 1: digital imaging with ds9
... 1. Start up DS9 and read in one of the images you just downloaded. 2. Experiment with manipulating the images using DS9. For example: a. Move the cursor across the image, and note how you can measure the locations and intensities (“brightness”) of individual pixels using the real-time display at the ...
... 1. Start up DS9 and read in one of the images you just downloaded. 2. Experiment with manipulating the images using DS9. For example: a. Move the cursor across the image, and note how you can measure the locations and intensities (“brightness”) of individual pixels using the real-time display at the ...
Lecture 9/10 Stellar evolution Ulf Torkelsson 1 Main sequence stars
... There is a gradual increase in the helium abundance during the main-sequence phase. The increase in molecular weight results in that the core is contracting and heating up in order to provide a sufficient pressure to balance the gravity. As a consequence of this the surface layers are gradually expa ...
... There is a gradual increase in the helium abundance during the main-sequence phase. The increase in molecular weight results in that the core is contracting and heating up in order to provide a sufficient pressure to balance the gravity. As a consequence of this the surface layers are gradually expa ...
The Sculptor dwarf irregular galaxy SDIG: present and past
... (de Vaucouleurs et al. 1991) lists a colour excess of zero, which is derived from galaxy counts and measurements of galactic H I (Burstein & Heiles 1984). Given that SDIG is more than 10° away from the Sculptor dwarf spheroidal, a direct measurement is preferable. Thus, the authors adopt the RC3 val ...
... (de Vaucouleurs et al. 1991) lists a colour excess of zero, which is derived from galaxy counts and measurements of galactic H I (Burstein & Heiles 1984). Given that SDIG is more than 10° away from the Sculptor dwarf spheroidal, a direct measurement is preferable. Thus, the authors adopt the RC3 val ...
7-12 Script - Geophysical Institute
... Moving out even further, our galaxy is part of the universe. LOCAL UNIVERSE There is still much to learn about our universe. One thing we do know is that while gravitational attraction pulls some bodies closer together, the universe as a whole is expanding. This expansion started when the universe s ...
... Moving out even further, our galaxy is part of the universe. LOCAL UNIVERSE There is still much to learn about our universe. One thing we do know is that while gravitational attraction pulls some bodies closer together, the universe as a whole is expanding. This expansion started when the universe s ...
Star and Constellation Visuals Comparing Size: Moon, Earth
... Raise your hand if you see some way that it is different from our star? Its blue Yes stars can be different colors depending on their age. deep space picture showing lots of different stars. http://images.sciencedaily.com/2007/01/070110181358.jpg The picture in the square is a closer look at a few ...
... Raise your hand if you see some way that it is different from our star? Its blue Yes stars can be different colors depending on their age. deep space picture showing lots of different stars. http://images.sciencedaily.com/2007/01/070110181358.jpg The picture in the square is a closer look at a few ...
chapter15SurveyStars..
... It would be only 1/3 as bright It would be only 1/6 as bright It would be only 1/9 as bright It would be three times brighter ...
... It would be only 1/3 as bright It would be only 1/6 as bright It would be only 1/9 as bright It would be three times brighter ...
The Dragonfly Telephoto Array
... ground stars near the science fields, and so we do not attempt ghost was masked out of all calibration and science images. The to model it. Similarly, multiple bounces between the reflecting most distinct reflections beyond 2′ are caused by the dewar winsurfaces and the CCD will contribute a small a ...
... ground stars near the science fields, and so we do not attempt ghost was masked out of all calibration and science images. The to model it. Similarly, multiple bounces between the reflecting most distinct reflections beyond 2′ are caused by the dewar winsurfaces and the CCD will contribute a small a ...
Measuring the surface temperature of stars by analysing their spectra
... and dark lines superposed. You can find examples of stellar spectra in the other downloadable documents. For this activity, we will neglect the dark lines and focus on the continuous component. As long as a star can be considered to be a black body (and this is almost true in most cases), we can use ...
... and dark lines superposed. You can find examples of stellar spectra in the other downloadable documents. For this activity, we will neglect the dark lines and focus on the continuous component. As long as a star can be considered to be a black body (and this is almost true in most cases), we can use ...
mufon ufo symposium -1974
... indicating planets. According to Carl Sagan, F8 is the point where intelligent life would have time to emerge. So main sequence stars from F8 through the Gs, to the early Ks have a possibility for life, including intelligent life. Many exobiologists place the break-off point for life in the early Ks ...
... indicating planets. According to Carl Sagan, F8 is the point where intelligent life would have time to emerge. So main sequence stars from F8 through the Gs, to the early Ks have a possibility for life, including intelligent life. Many exobiologists place the break-off point for life in the early Ks ...
The Northern Winter Constellations - Science
... Introduction The winter sky is an excellent place to begin exploring the constellations that make up the night sky. Orion is the key, or signpost, for locating many of the other constellations in the winter sky. There are two convenient ways to locate all of the main constellations around Orion once ...
... Introduction The winter sky is an excellent place to begin exploring the constellations that make up the night sky. Orion is the key, or signpost, for locating many of the other constellations in the winter sky. There are two convenient ways to locate all of the main constellations around Orion once ...
Hipparcos
Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993. It was the first space experiment devoted to precision astrometry, the accurate measurement of the positions of celestial objects on the sky. This permitted the accurate determination of proper motions and parallaxes of stars, allowing a determination of their distance and tangential velocity. When combined with radial-velocity measurements from spectroscopy, this pinpointed all six quantities needed to determine the motion of stars. The resulting Hipparcos Catalogue, a high-precision catalogue of more than 118,200 stars, was published in 1997. The lower-precision Tycho Catalogue of more than a million stars was published at the same time, while the enhanced Tycho-2 Catalogue of 2.5 million stars was published in 2000. Hipparcos ' follow-up mission, Gaia, was launched in 2013.The word ""Hipparcos"" is an acronym for High precision parallax collecting satellite and also a reference to the ancient Greek astronomer Hipparchus of Nicaea, who is noted for applications of trigonometry to astronomy and his discovery of the precession of the equinoxes.