Course Description: This is an introductory course in Descriptive
... e) Relating the position of Polaris and the Southern Cross to an observer’s latitude on Earth. f) Estimating angular distances between celestial objects. g) Relating the parallax of an object to its distance. Competency 3: The student will demonstrate knowledge and comprehension of celestial motion ...
... e) Relating the position of Polaris and the Southern Cross to an observer’s latitude on Earth. f) Estimating angular distances between celestial objects. g) Relating the parallax of an object to its distance. Competency 3: The student will demonstrate knowledge and comprehension of celestial motion ...
Properties of Galactic early-type O
... the dense absorbing clumps along a given line of sight, only occur at discrete velocities, and leads to a reduction in the strength of P Cygni absorption components (Owocki 2008). This velocity porosity has been implemented in 2D/3D stochastic wind models by Sundqvist et al. (2010, 2011), who conclu ...
... the dense absorbing clumps along a given line of sight, only occur at discrete velocities, and leads to a reduction in the strength of P Cygni absorption components (Owocki 2008). This velocity porosity has been implemented in 2D/3D stochastic wind models by Sundqvist et al. (2010, 2011), who conclu ...
the next decade - Lowell Observatory
... and 300 Sun-like stars have been gathered at Lowell Observatory using the SolarStellar Spectrograph (SSS), complementing the MWO target set and spectral coverage. Synoptic photometry was carried out for 18 years at Lowell, and continues today at the Fairborn Observatory, in a program run by by Tenne ...
... and 300 Sun-like stars have been gathered at Lowell Observatory using the SolarStellar Spectrograph (SSS), complementing the MWO target set and spectral coverage. Synoptic photometry was carried out for 18 years at Lowell, and continues today at the Fairborn Observatory, in a program run by by Tenne ...
Spectral Line VLBI - Australia Telescope National Facility
... • VLBI Exploration of Radio Astrometry • Dedicated phase referencing VLBI network • Four 20-m antennas spread over Japan with dual-beam systems Up to 2 degree separation ...
... • VLBI Exploration of Radio Astrometry • Dedicated phase referencing VLBI network • Four 20-m antennas spread over Japan with dual-beam systems Up to 2 degree separation ...
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... This document describes the Palomar Observatory DBSP guider control software. The DBSP instrument is a dual channel spectrograph that simultaneously measures spectra in both the blue and red portions of t ...
... This document describes the Palomar Observatory DBSP guider control software. The DBSP instrument is a dual channel spectrograph that simultaneously measures spectra in both the blue and red portions of t ...
December - Rose City Astronomers
... scanty star grouping of DolidzeDžimšelejšvili 1 (Do-Dž 1). This triple star and open cluster combo is a remarkable stroke of cosmic serendipity in an area nearly devoid of other major deep-sky objects. The refractor at 44x shows the 12' diameter star cluster as six stars (9th to 11thmagnitude) embed ...
... scanty star grouping of DolidzeDžimšelejšvili 1 (Do-Dž 1). This triple star and open cluster combo is a remarkable stroke of cosmic serendipity in an area nearly devoid of other major deep-sky objects. The refractor at 44x shows the 12' diameter star cluster as six stars (9th to 11thmagnitude) embed ...
- Notesvillage
... will also sweep out an area equal to A1. For example, the area swept out by the satellite in a one hour period around the point farthest from the earth (the orbit’s apogee), labeled A2 on the figure, will be equal to A1, i.e.: A1 =A2. This result also shows that the satellite orbital velocity is not ...
... will also sweep out an area equal to A1. For example, the area swept out by the satellite in a one hour period around the point farthest from the earth (the orbit’s apogee), labeled A2 on the figure, will be equal to A1, i.e.: A1 =A2. This result also shows that the satellite orbital velocity is not ...
OUR SOLAR SYSTEM
... potentially could exist — as a way to identify exoplanets that may be capable of supporting life as we understand it. While we can quibble with the definition — perhaps there’s a biology that uses solvents other than water or maybe life can develop entirely beneath the surface — it’s a place to star ...
... potentially could exist — as a way to identify exoplanets that may be capable of supporting life as we understand it. While we can quibble with the definition — perhaps there’s a biology that uses solvents other than water or maybe life can develop entirely beneath the surface — it’s a place to star ...
Signals from the Beginnings of the World - Max-Planck
... of a cosmic mass swallower: a black hole is born. Astrophysicists are working on the theoretical details of this scenario. What causes gas to stream into a central compact object at high velocity and thus convert its surroundings into a source of high-energy light and plasma jets? If you want to und ...
... of a cosmic mass swallower: a black hole is born. Astrophysicists are working on the theoretical details of this scenario. What causes gas to stream into a central compact object at high velocity and thus convert its surroundings into a source of high-energy light and plasma jets? If you want to und ...
Measuring the Distance to the Sun: Final Report
... Some days later, we heard that La Silla had taken pictures of the three asteroids during the second night as well. We managed to get them before they had been published and tried to combine them with the data from Portugal. But, unfortunately, the time difference between the pictures due to Portugal ...
... Some days later, we heard that La Silla had taken pictures of the three asteroids during the second night as well. We managed to get them before they had been published and tried to combine them with the data from Portugal. But, unfortunately, the time difference between the pictures due to Portugal ...
On the nature of sn stars. I. A detailed abundance study
... The sn stars were first discoved by Abt & Levato when studying the spectral types in different open clusters. These stars present sharp Balmer lines, sharp metallic lines (C II, Si II, Ca II, Ti II, Fe II), and broad coreless He I lines. Some of the sn stars seem to be related to CP stars. Initially ...
... The sn stars were first discoved by Abt & Levato when studying the spectral types in different open clusters. These stars present sharp Balmer lines, sharp metallic lines (C II, Si II, Ca II, Ti II, Fe II), and broad coreless He I lines. Some of the sn stars seem to be related to CP stars. Initially ...
Laser Ranging
... Laser-ranging observa- 1,011.4). This is really an average position tions have proved their scien- because, over the life of the mission, the CG surveyed target monuments on the ground. tific worth in a number of different areas. In is expected to move by about 4.6 millimeters Also, before deploymen ...
... Laser-ranging observa- 1,011.4). This is really an average position tions have proved their scien- because, over the life of the mission, the CG surveyed target monuments on the ground. tific worth in a number of different areas. In is expected to move by about 4.6 millimeters Also, before deploymen ...
M104: The Sombrero Galaxy
... This photogenic galaxy looks like a broad-brimmed Mexican hat floating in space. Appropriately called the Sombrero Galaxy, its catalogue name is Messier 104 (M104). Thick dust lanes make up the brim of the galaxy. The brim winds into the brilliant white crown, made up of a central bulge of older sta ...
... This photogenic galaxy looks like a broad-brimmed Mexican hat floating in space. Appropriately called the Sombrero Galaxy, its catalogue name is Messier 104 (M104). Thick dust lanes make up the brim of the galaxy. The brim winds into the brilliant white crown, made up of a central bulge of older sta ...
Searching for Dwarf Galaxies and Population III Star
... allow a deep image of a substantial fraction of the edge of the bubble. The actual length scale over which these sources are discovered will reveal or set a lower limit on the size of the local bubble. The exposure time of 4 hours will allow detections in the range of ~6 x 10-19 erg/s/cm2. 2. If we ...
... allow a deep image of a substantial fraction of the edge of the bubble. The actual length scale over which these sources are discovered will reveal or set a lower limit on the size of the local bubble. The exposure time of 4 hours will allow detections in the range of ~6 x 10-19 erg/s/cm2. 2. If we ...
Earth-Sky Relationships and the Celestial Sphere
... would be able to divide the sky into a Northern and Southern Hemisphere. We call this dividing line on the sky the Celestial Equator, and it is represented on your celestial sphere as the “seam” between the bottom and top halves of the sphere. We know that the poles of the Earth are the points on t ...
... would be able to divide the sky into a Northern and Southern Hemisphere. We call this dividing line on the sky the Celestial Equator, and it is represented on your celestial sphere as the “seam” between the bottom and top halves of the sphere. We know that the poles of the Earth are the points on t ...
Astrometry of Asteroids
... In this exercise, you’ll only be looking at a few specific spots in the sky . To save room on your computer, we’ve extracted only part of the GSC and stored it on your computer for use in this exercise. The Technique of Astrometry: Finding the Coordinates of Unknown Objects The lines of right ascens ...
... In this exercise, you’ll only be looking at a few specific spots in the sky . To save room on your computer, we’ve extracted only part of the GSC and stored it on your computer for use in this exercise. The Technique of Astrometry: Finding the Coordinates of Unknown Objects The lines of right ascens ...
Astrometry of Asteroids
... In this exercise, you’ll only be looking at a few specific spots in the sky . To save room on your computer, we’ve extracted only part of the GSC and stored it on your computer for use in this exercise. The Technique of Astrometry: Finding the Coordinates of Unknown Objects The lines of right ascens ...
... In this exercise, you’ll only be looking at a few specific spots in the sky . To save room on your computer, we’ve extracted only part of the GSC and stored it on your computer for use in this exercise. The Technique of Astrometry: Finding the Coordinates of Unknown Objects The lines of right ascens ...
Astrometry of Asteroids
... In this exercise, you’ll only be looking at a few specific spots in the sky . To save room on your computer, we’ve extracted only part of the GSC and stored it on your computer for use in this exercise. The Technique of Astrometry: Finding the Coordinates of Unknown Objects The lines of right ascens ...
... In this exercise, you’ll only be looking at a few specific spots in the sky . To save room on your computer, we’ve extracted only part of the GSC and stored it on your computer for use in this exercise. The Technique of Astrometry: Finding the Coordinates of Unknown Objects The lines of right ascens ...
Astrometry of Asteroids
... In this exercise, you’ll only be looking at a few specific spots in the sky . To save room on your computer, we’ve extracted only part of the GSC and stored it on your computer for use in this exercise. The Technique of Astrometry: Finding the Coordinates of Unknown Objects The lines of right ascens ...
... In this exercise, you’ll only be looking at a few specific spots in the sky . To save room on your computer, we’ve extracted only part of the GSC and stored it on your computer for use in this exercise. The Technique of Astrometry: Finding the Coordinates of Unknown Objects The lines of right ascens ...
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.