– 1 – 1. Historical Notes for Ay 123 1.1.
... actually are. It is now clear that there are some problems specific to certain situations in the catalog. GAIA – another ESA project, to be launched in 2012, collecting area 30 × that of Hipparcos, position measurements 200 × more accurate than Hipparcos. SIM (space interferometry mission) – JPL pro ...
... actually are. It is now clear that there are some problems specific to certain situations in the catalog. GAIA – another ESA project, to be launched in 2012, collecting area 30 × that of Hipparcos, position measurements 200 × more accurate than Hipparcos. SIM (space interferometry mission) – JPL pro ...
The Distances to the Stars
... Note that measuring such motions requires the existence of a fixed reference frame, provided by celestial objects whose motions are not detectable. Usually very distant stars will do, but for the most accurate astrometry astronomers use distant galaxies or quasars as reference points. Two thousand y ...
... Note that measuring such motions requires the existence of a fixed reference frame, provided by celestial objects whose motions are not detectable. Usually very distant stars will do, but for the most accurate astrometry astronomers use distant galaxies or quasars as reference points. Two thousand y ...
mass loss of massive stars - of /proceedings
... Stars more massive than 25 M (et solar metallicity) end their lives as Wolf-Rayet stars (WR). The WR phase takes up to 5% of the star’s lifetime. Typically, a 40 M star will spend 0.2 Myr as a WR for a total lifetime of 5 Myr. During that phase, Wolf-Rayet stars have strong stellar winds character ...
... Stars more massive than 25 M (et solar metallicity) end their lives as Wolf-Rayet stars (WR). The WR phase takes up to 5% of the star’s lifetime. Typically, a 40 M star will spend 0.2 Myr as a WR for a total lifetime of 5 Myr. During that phase, Wolf-Rayet stars have strong stellar winds character ...
Star Maps - Astronomy Outreach - The University of Texas at Austin
... Part II: Making and Using the Star Wheels (20 minutes) - inside A. Making the Star Wheel (omit this part if you use purchased planispheres) Materials: Uncle Al's Sky Wheel Make "Uncle Al's Sky Wheel." Allow students at least 20-minutes to complete their wheels. There are two wheels: one with con ...
... Part II: Making and Using the Star Wheels (20 minutes) - inside A. Making the Star Wheel (omit this part if you use purchased planispheres) Materials: Uncle Al's Sky Wheel Make "Uncle Al's Sky Wheel." Allow students at least 20-minutes to complete their wheels. There are two wheels: one with con ...
bode elert johann
... collection of astronomical tables, made in partnership with Johann Heinrich Lambert and Johann Karl Gottlieb Schulze. Vol. i contains an 89-page star catalogue, compiled by Bode.12 This “Stern-Verzeichnis nach vier Astronomen” assembles the star catalogues of Hevelius, Flamsteed, Lacaille and Bradle ...
... collection of astronomical tables, made in partnership with Johann Heinrich Lambert and Johann Karl Gottlieb Schulze. Vol. i contains an 89-page star catalogue, compiled by Bode.12 This “Stern-Verzeichnis nach vier Astronomen” assembles the star catalogues of Hevelius, Flamsteed, Lacaille and Bradle ...
Apparent Motion of the Stars Worksheet
... Delimit the circumpolar region as seen from any location. [Rule: The circumpolar region where stars never set below the horizon is a circular area of the sky centered on the visible celestial pole and extending to the horizon. The declination of the circumpolar boundary is given by ±(90°-observer’ ...
... Delimit the circumpolar region as seen from any location. [Rule: The circumpolar region where stars never set below the horizon is a circular area of the sky centered on the visible celestial pole and extending to the horizon. The declination of the circumpolar boundary is given by ±(90°-observer’ ...
Understanding Stars
... Try to distribute the work so each group member is responsible for one star – and if you have more stars than group members, feel free to leave off any extra stars. The values for the Sun are given in the first row for reference. ...
... Try to distribute the work so each group member is responsible for one star – and if you have more stars than group members, feel free to leave off any extra stars. The values for the Sun are given in the first row for reference. ...
Document
... stellar composition. An example is Lithium Lithium is destroyed at temperatures of T ≈ 2 x 106 K. The convection zone of the star brings Li to the deeper, hotter layers of the star where it is destroyed by conversion to He. It is used as an indication of age, although it depends on the depth of the ...
... stellar composition. An example is Lithium Lithium is destroyed at temperatures of T ≈ 2 x 106 K. The convection zone of the star brings Li to the deeper, hotter layers of the star where it is destroyed by conversion to He. It is used as an indication of age, although it depends on the depth of the ...
Luminosities and magnitudes of stars
... a measure of how big that object appears to an observer at that point. For instance, a small object nearby could subtend the same solid angle as a large object far away. The solid angle is proportional to the surface area, S, of a projection of that object onto a sphere centered at that point, divid ...
... a measure of how big that object appears to an observer at that point. For instance, a small object nearby could subtend the same solid angle as a large object far away. The solid angle is proportional to the surface area, S, of a projection of that object onto a sphere centered at that point, divid ...
Distant Stars - How far away is it
... This star is very faint. It is made of almost purely hydrogen and helium, with only extremely small amounts of heavier elements. We estimate that the star is probably more than 13 billion years old. That would make it one of the oldest stars in the universe. ...
... This star is very faint. It is made of almost purely hydrogen and helium, with only extremely small amounts of heavier elements. We estimate that the star is probably more than 13 billion years old. That would make it one of the oldest stars in the universe. ...
Star-S_Teacher_Guide - The University of Texas at Dallas
... good way to talk about scale factors with your students is to discuss maps. You may also want to ask your students to name other types of scale models they have seen before, such as model cars, model rockets, globes, etc. o What does a scale factor mean? In this scale model, instead of one inch equa ...
... good way to talk about scale factors with your students is to discuss maps. You may also want to ask your students to name other types of scale models they have seen before, such as model cars, model rockets, globes, etc. o What does a scale factor mean? In this scale model, instead of one inch equa ...
Photoelectric Photometry of the Pleiades
... lot of desired photons, and only a little noise. To obtain the most accurate readings, you should strive for S/N Ratio’s of 100 or more. You can increase the S/N Ratio by increasing the integration time because the S/N Ratio is directly proportional to the square root of the total collected raw coun ...
... lot of desired photons, and only a little noise. To obtain the most accurate readings, you should strive for S/N Ratio’s of 100 or more. You can increase the S/N Ratio by increasing the integration time because the S/N Ratio is directly proportional to the square root of the total collected raw coun ...
A near IR adaptive optics search for faint companions to early
... We suspect that it is a highly reddened (J − K = 2.4) background star. In this region of sky there are other multiple systems with similar proper motions and radial velocities (e.g. HR 3283, 3322, 3359). Therefore, NO Pup belongs to an association. HD 108248/49/50 = α1,2 Cru. The coronographic image ...
... We suspect that it is a highly reddened (J − K = 2.4) background star. In this region of sky there are other multiple systems with similar proper motions and radial velocities (e.g. HR 3283, 3322, 3359). Therefore, NO Pup belongs to an association. HD 108248/49/50 = α1,2 Cru. The coronographic image ...
Galaxies (and stars) in the far infrared: results from the AKARI All
... Relations between star formation and late stages of stellar evolution: through the content of interstellar matter This can be tested observationally mainly thanks to the IR data ...
... Relations between star formation and late stages of stellar evolution: through the content of interstellar matter This can be tested observationally mainly thanks to the IR data ...
MS Word version
... The following sequence of directions are steps an instructor might choose to follow in demonstrating the Eclipsing Binary Simulator in a classroom situation. We provide these suggestions with appropriate questions (shown in bold italics) to pose to the class as an aid in promoting interactivity. We ...
... The following sequence of directions are steps an instructor might choose to follow in demonstrating the Eclipsing Binary Simulator in a classroom situation. We provide these suggestions with appropriate questions (shown in bold italics) to pose to the class as an aid in promoting interactivity. We ...
The Milky Way
... • HALO Contains most globular clusters, and most Pop II stars; roughly 30 kpc (105 lt-yr) in diameter. • THICK DISK roughly 5 kpc thick, and 30 kpc in diameter; contains Pop I stars (but low density). • THIN DISK ~500 pc thick: contains MOST stars; includes spiral arms and great majority of luminosi ...
... • HALO Contains most globular clusters, and most Pop II stars; roughly 30 kpc (105 lt-yr) in diameter. • THICK DISK roughly 5 kpc thick, and 30 kpc in diameter; contains Pop I stars (but low density). • THIN DISK ~500 pc thick: contains MOST stars; includes spiral arms and great majority of luminosi ...
P10263v1.2 Lab 6 Text
... In this lab, we will study four Cepheid Variable stars located in the Small Magellanic Cloud (SMC). Even if these stars are spread out all over the SMC, we can assume they are all at the same distance. Assuming the distance to the SMC is 53,000 parsecs, the worst case would be that one would be at, ...
... In this lab, we will study four Cepheid Variable stars located in the Small Magellanic Cloud (SMC). Even if these stars are spread out all over the SMC, we can assume they are all at the same distance. Assuming the distance to the SMC is 53,000 parsecs, the worst case would be that one would be at, ...
Exploration of the Milky Way and Nearby galaxies
... such as the alpha-element Mg, are mandatory for demonstrating that the same type of stars produced the metals found in dwarf galaxies and the Galactic halo. Frebel et al. showed that the overall abundance pattern mirrors that seen in lowmetallicity halo stars, including alpha-elements. Such chemical ...
... such as the alpha-element Mg, are mandatory for demonstrating that the same type of stars produced the metals found in dwarf galaxies and the Galactic halo. Frebel et al. showed that the overall abundance pattern mirrors that seen in lowmetallicity halo stars, including alpha-elements. Such chemical ...
Your Star: _____________________ Write down the wavelength at which the one
... Your group will be in charge of a particular region of the sky (north, south, or one of four seasonal groups). Each student in the group should choose, and perform the calculations for, one particular star, but please help each other out and check each other's answers. To help speed the calculations ...
... Your group will be in charge of a particular region of the sky (north, south, or one of four seasonal groups). Each student in the group should choose, and perform the calculations for, one particular star, but please help each other out and check each other's answers. To help speed the calculations ...
April - Bristol Astronomical Society
... Corvus was sent by the god Apollo to fetch a cup of water, however on the way saw a fig tree and instead of returning straight away with the water it decided to wait for the fruit to ripen. When Corvus eventually returned it blamed the delay on a serpent (Hydra) that had attacked it. Apollo knew tha ...
... Corvus was sent by the god Apollo to fetch a cup of water, however on the way saw a fig tree and instead of returning straight away with the water it decided to wait for the fruit to ripen. When Corvus eventually returned it blamed the delay on a serpent (Hydra) that had attacked it. Apollo knew tha ...
Apparent Magnitude - RanelaghALevelPhysics
... • The Sun’s luminosity is about 4 x 1026 W. • The most luminous stars have a luminosity of about million times that of the Sun! ...
... • The Sun’s luminosity is about 4 x 1026 W. • The most luminous stars have a luminosity of about million times that of the Sun! ...
Agenda - Relativity Group
... • Do supernovae explode near the Earth? • At least four supernovae have been observed in our Milky Way galaxy during the last thousand years, in 1006, 1054, 1572, and 1064. Another supernova called Supernova 1987A was observed to explode in the Large Magellanic Cloud, a companion galaxy to the Milky ...
... • Do supernovae explode near the Earth? • At least four supernovae have been observed in our Milky Way galaxy during the last thousand years, in 1006, 1054, 1572, and 1064. Another supernova called Supernova 1987A was observed to explode in the Large Magellanic Cloud, a companion galaxy to the Milky ...
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 Bigger Picture
... `astrometrists’ are trying to measure a tiny motion of the centroid as it moves back and forth every six months. The lack of parallax apparent to the unaided eye was used as a proof that the Earth did not revolve around the Sun. ...
... `astrometrists’ are trying to measure a tiny motion of the centroid as it moves back and forth every six months. The lack of parallax apparent to the unaided eye was used as a proof that the Earth did not revolve around the Sun. ...
Star catalogue
A star catalogue, or star catalog, is an astronomical catalogue that lists stars. In astronomy, many stars are referred to simply by catalogue numbers. There are a great many different star catalogues which have been produced for different purposes over the years, and this article covers only some of the more frequently quoted ones. Star catalogues were compiled by many different ancient peoples, including the Babylonians, Greeks, Chinese, Persians, and Arabs. Most modern catalogues are available in electronic format and can be freely downloaded from NASA's Astronomical Data Center.Completeness and accuracy is described by the weakest apparent magnitude V (largest number) and the accuracy of the positions.