Measuring Magnitudes
... measure any desired spatial variations in the surface brightness. Accurate measurements of photometric quantities requires attention to several items. First the CCD's spectral response means it measures light from 4000Å through 9000Å with varying efficiencies. In general the CCD's response peaks nea ...
... measure any desired spatial variations in the surface brightness. Accurate measurements of photometric quantities requires attention to several items. First the CCD's spectral response means it measures light from 4000Å through 9000Å with varying efficiencies. In general the CCD's response peaks nea ...
Astro 001 Spring 2002
... (23) Why was Copernicus forced to use epicycles in his model? A. To account for retrograde motion. B. To account for phases of the Moon. C. To accurately predict the position of a planet. D. [Both A and B above.] E. [All of the above.] (24) The Sun appears to move among the stars. The Copernican mod ...
... (23) Why was Copernicus forced to use epicycles in his model? A. To account for retrograde motion. B. To account for phases of the Moon. C. To accurately predict the position of a planet. D. [Both A and B above.] E. [All of the above.] (24) The Sun appears to move among the stars. The Copernican mod ...
Exploring the physical properties of the first galaxies
... The James Webb Space Telescope will revolutionise the study of the early Universe allowing us to push to much higher redshift and fainter luminosities. NIRSpec will also allow us to study optical emission lines in galaxies to z~7 (making confirmation possible for many candidates) as well as identify ...
... The James Webb Space Telescope will revolutionise the study of the early Universe allowing us to push to much higher redshift and fainter luminosities. NIRSpec will also allow us to study optical emission lines in galaxies to z~7 (making confirmation possible for many candidates) as well as identify ...
Target Stars for Earth-like Planet Searches with the Terrestrial
... There is broad interest in the problem of identifying and characterizing terrestrial (Earth-like) planets outside of our Solar System. Several studies are underway to develop concepts and plans for the Terrestrial Planet Finder (TPF) space mission (see Beichman et al., 1999: "Terrestrial Planet Find ...
... There is broad interest in the problem of identifying and characterizing terrestrial (Earth-like) planets outside of our Solar System. Several studies are underway to develop concepts and plans for the Terrestrial Planet Finder (TPF) space mission (see Beichman et al., 1999: "Terrestrial Planet Find ...
... CAIs are thought to be the first solid objects formed when the Solar System formed. Analysis of CAIs indicates that the ratio of aluminum-26 to the common, nonradioactive aluminum-27 was about 0.00005 when the objects formed. However, a few CAIs have much lower ratios, so low that they may not have ...
Ch 11c and 12 ( clusters 3-31-11)
... stars we born at the same time, we can measure a cluster’s age by finding the main sequence turnoff point on an H–R diagram of its stars. The cluster’s age is equal to the hydrogenburning lifetime of the hottest, most luminous stars that remain on the main sequence. ...
... stars we born at the same time, we can measure a cluster’s age by finding the main sequence turnoff point on an H–R diagram of its stars. The cluster’s age is equal to the hydrogenburning lifetime of the hottest, most luminous stars that remain on the main sequence. ...
observing cards - NC Science Festival
... Planets orbiting new stars within open clusters likely live very chaotic lives. They have not yet formed stable orbits so collisions occur often. While our Sun was still in an open cluster, a Mars-sized planet probably slammed into Earth, eventually creating our Moon. ...
... Planets orbiting new stars within open clusters likely live very chaotic lives. They have not yet formed stable orbits so collisions occur often. While our Sun was still in an open cluster, a Mars-sized planet probably slammed into Earth, eventually creating our Moon. ...
Spectroscopic variability of two Oe stars
... phenomenon towards higher stellar temperatures. Indeed, these stars display emission lines of the H i Balmer series, as well as of other elements, such as He i and Fe ii, but do not exhibit conventional Of emission lines, such as He ii λ 4686 and N iii λ 4634-40. Negueruela et al. (2004) note that p ...
... phenomenon towards higher stellar temperatures. Indeed, these stars display emission lines of the H i Balmer series, as well as of other elements, such as He i and Fe ii, but do not exhibit conventional Of emission lines, such as He ii λ 4686 and N iii λ 4634-40. Negueruela et al. (2004) note that p ...
Lecture 10: The Hertzsprung
... See also Figure 19-21 in your book There is a mass-luminosity relation on the main sequence. We can use that + a sample of stars where we get all the stars within a certain distance of the Sun to figure out how many stars of what masses are out there. Answer: Lots of low-mass stars! Very few high-m ...
... See also Figure 19-21 in your book There is a mass-luminosity relation on the main sequence. We can use that + a sample of stars where we get all the stars within a certain distance of the Sun to figure out how many stars of what masses are out there. Answer: Lots of low-mass stars! Very few high-m ...
star
... Objects with masses between 1/100 and 1/12 that of the Sun are called brown dwarfs They may produce energy for a brief time by nuclear reactions, but do not become hot enough to fuse protons They are intermediate in mass between stars and planets ...
... Objects with masses between 1/100 and 1/12 that of the Sun are called brown dwarfs They may produce energy for a brief time by nuclear reactions, but do not become hot enough to fuse protons They are intermediate in mass between stars and planets ...
norfolk skies - Norfolk Astronomical Society
... method described above. The nebula forms the apex of a triangle with two stars of equal brightness. Good luck on this difficult object. NGC 2327 - An interesting nebula extending north from a faint double star. It reminds me of the more famous NGC 2261 in Monocerous (Hubble’s Variable Nebula) becaus ...
... method described above. The nebula forms the apex of a triangle with two stars of equal brightness. Good luck on this difficult object. NGC 2327 - An interesting nebula extending north from a faint double star. It reminds me of the more famous NGC 2261 in Monocerous (Hubble’s Variable Nebula) becaus ...
ASTRONOMY 113 Modern Astronomy
... A great island of stars in space, all held together by gravity and orbiting a common center ...
... A great island of stars in space, all held together by gravity and orbiting a common center ...
Current Status of the Hobby-Eberly Telescope Wide Field
... The Hobby-Eberly Telescope (HET) was originally envisioned as a spectroscopic survey telescope, able to efficiently survey objects over wide areas of the sky. While the telescope has been very successful observing large samples of objects such as quasi-stellar objects (QSOs) spread over the sky with ...
... The Hobby-Eberly Telescope (HET) was originally envisioned as a spectroscopic survey telescope, able to efficiently survey objects over wide areas of the sky. While the telescope has been very successful observing large samples of objects such as quasi-stellar objects (QSOs) spread over the sky with ...
Journey to the Stars Educator`s Guide
... the Sun, we see how its churning outer layers generate a vast magnetic field, and a stunning visualization then reveals how the Sun’s magnetic field and solar wind extend across the Solar System. Earth’s own magnetic field almost always shields it from the dangerous blast of charged particles—only a tr ...
... the Sun, we see how its churning outer layers generate a vast magnetic field, and a stunning visualization then reveals how the Sun’s magnetic field and solar wind extend across the Solar System. Earth’s own magnetic field almost always shields it from the dangerous blast of charged particles—only a tr ...
O star
... An experienced spectroscopist can classify both the spectral type and the luminosity class of a star from its spectrum. This is extraordinarily valuable, as it means that, just from the spectrum of a star, one can plot it in on the H-R diagram. BUT: if you can plot a star on the H-R diagram, you kn ...
... An experienced spectroscopist can classify both the spectral type and the luminosity class of a star from its spectrum. This is extraordinarily valuable, as it means that, just from the spectrum of a star, one can plot it in on the H-R diagram. BUT: if you can plot a star on the H-R diagram, you kn ...
Photometry – I. “All sky”
... years, you might not even be able to get the same glass that was used previously. Detectors are also not really uniform; CCDs are much more red-sensitive than photomultipliers and different types (of either) might have significantly different responses as a function of wavelength. At the same time, ...
... years, you might not even be able to get the same glass that was used previously. Detectors are also not really uniform; CCDs are much more red-sensitive than photomultipliers and different types (of either) might have significantly different responses as a function of wavelength. At the same time, ...
Michael Ouzounian
... This project encompasses many aspects of photography, physics and engineering. Therefore, to comprehend it completely, a basic understanding of lenses, photography, and their practical application in astronomy is necessary. Part 1: Physics for Photography 101 The most important component of a telesc ...
... This project encompasses many aspects of photography, physics and engineering. Therefore, to comprehend it completely, a basic understanding of lenses, photography, and their practical application in astronomy is necessary. Part 1: Physics for Photography 101 The most important component of a telesc ...
G060325-00
... Y and Zhou Z 2003 “ASTROD I: Mission Concept and Venus Flybys” Proc. 5th IAA Int. Conf. On Low-Cost Planetary Missions, ESTEC, Noordwijk, The Netherlands, 24-26 September 2003, ESA SP-542 79-86; ibid 2006 Acta Astronautica 58 in press [6]. S. Shiomi, and W.-T. Ni. Acceleration disturbances and requi ...
... Y and Zhou Z 2003 “ASTROD I: Mission Concept and Venus Flybys” Proc. 5th IAA Int. Conf. On Low-Cost Planetary Missions, ESTEC, Noordwijk, The Netherlands, 24-26 September 2003, ESA SP-542 79-86; ibid 2006 Acta Astronautica 58 in press [6]. S. Shiomi, and W.-T. Ni. Acceleration disturbances and requi ...
PDF - Subaru Telescope
... IRD aims at detecting ~50 planets around nearby M dwarfs, including 10 Earth-like planets in habitable zone IRD will survey ~ 100 late M-dwarfs for 5 years and SSP is ...
... IRD aims at detecting ~50 planets around nearby M dwarfs, including 10 Earth-like planets in habitable zone IRD will survey ~ 100 late M-dwarfs for 5 years and SSP is ...
Star Formation
... Life Tracks for Different Masses • Models show that Sun required about 30 million years to go from protostar to main sequence • Higher-mass stars form faster • Lower-mass stars form more slowly ...
... Life Tracks for Different Masses • Models show that Sun required about 30 million years to go from protostar to main sequence • Higher-mass stars form faster • Lower-mass stars form more slowly ...
Sample manuscript showing specifications and style
... and digital communication is made to the interface module. FPGA’s perform most of the digital functionality. A key element is the 8-channel digitiser using DCDS, as described more fully in the paper by Clapp9. This is designed to operate at 500 kHz- to provide the required readout time of less than ...
... and digital communication is made to the interface module. FPGA’s perform most of the digital functionality. A key element is the 8-channel digitiser using DCDS, as described more fully in the paper by Clapp9. This is designed to operate at 500 kHz- to provide the required readout time of less than ...
International Ultraviolet Explorer
The International Ultraviolet Explorer (IUE) was an astronomical observatory satellite primarily designed to take ultraviolet spectra. The satellite was a collaborative project between NASA, the UK Science Research Council and the European Space Agency (ESA). The mission was first proposed in early 1964, by a group of scientists in the United Kingdom, and was launched on January 26, 1978 aboard a NASA Delta rocket. The mission lifetime was initially set for 3 years, but in the end it lasted almost 18 years, with the satellite being shut down in 1996. The switch-off occurred for financial reasons, while the telescope was still functioning at near original efficiency.It was the first space observatory to be operated in real time by astronomers who visited the groundstations in the United States and Europe. Astronomers made over 104,000 observations using the IUE, of objects ranging from solar system bodies to distant quasars. Among the significant scientific results from IUE data were the first large scale studies of stellar winds, accurate measurements of the way interstellar dust absorbs light, and measurements of the supernova SN1987A which showed that it defied stellar evolution theories as they then stood. When the mission ended, it was considered the most successful astronomical satellite ever.