Stellarium User Guide - Skolekonsulenterne.dk
... Let time move on at this fast speed for a little while. Notice how the stars move across the sky. If you wait a little while, you’ll see the Sun rising and setting. It’s a bit like one of those time-lapse movies except there are no clouds. Stellarium not only allows for moving forward through time - ...
... Let time move on at this fast speed for a little while. Notice how the stars move across the sky. If you wait a little while, you’ll see the Sun rising and setting. It’s a bit like one of those time-lapse movies except there are no clouds. Stellarium not only allows for moving forward through time - ...
Astronomy Assignment #1
... Since the “addresses” of the stars in RA and dec are tied to the Earth (i.e. the celestial poles are the extension of the Earth’s rotation pole and the celestial equator lies directly above the Earth’s geographic equator), as the Earth reorients its rotation axis due to precession all the stars addr ...
... Since the “addresses” of the stars in RA and dec are tied to the Earth (i.e. the celestial poles are the extension of the Earth’s rotation pole and the celestial equator lies directly above the Earth’s geographic equator), as the Earth reorients its rotation axis due to precession all the stars addr ...
Astronomy Astrophysics Detailed abundances of a large sample of giant stars in... and in the Sagittarius nucleus
... Homogeneous abundances of light elements, α-elements, and Fe-group elements from high-resolution FLAMES spectra are presented for 76 red giant stars in NGC 6715 (M 54), a massive globular cluster (GC) lying in the nucleus of the Sagittarius dwarf galaxy. We also derived detailed abundances for 27 re ...
... Homogeneous abundances of light elements, α-elements, and Fe-group elements from high-resolution FLAMES spectra are presented for 76 red giant stars in NGC 6715 (M 54), a massive globular cluster (GC) lying in the nucleus of the Sagittarius dwarf galaxy. We also derived detailed abundances for 27 re ...
DUSTY CIRCUMSTELLAR DISKS B. Zuckerman
... of disks that orbit a few of the Vega-like stars (including Vega itself). These observations have been of thermal emission from grains at IR wavelengths between 10 and 25 µm, and, also, in the microwave band, near 1 mm wavelength. In addition, the NICMOS camera on the Hubble space telescope (HST) ha ...
... of disks that orbit a few of the Vega-like stars (including Vega itself). These observations have been of thermal emission from grains at IR wavelengths between 10 and 25 µm, and, also, in the microwave band, near 1 mm wavelength. In addition, the NICMOS camera on the Hubble space telescope (HST) ha ...
Sample pages 1 PDF
... The selection of the coordinate starting point for the right ascension is – the same as on Earth – a matter of choice. In the same way as all geographic meridians are equal among themselves (they are all great circles on the sphere), so are the celestial meridians. Due to historic reasons we have ag ...
... The selection of the coordinate starting point for the right ascension is – the same as on Earth – a matter of choice. In the same way as all geographic meridians are equal among themselves (they are all great circles on the sphere), so are the celestial meridians. Due to historic reasons we have ag ...
Is $^ 6$ Li in metal-poor halo stars produced in situ by solar
... We also assume that the rate of proton acceleration in stellar flares does not depend on metallicity, but only on surface magnetic flux. In solar flares, the particle acceleration processes at work in impulsive events are related to excitation of plasma waves that are essentially independent of the ...
... We also assume that the rate of proton acceleration in stellar flares does not depend on metallicity, but only on surface magnetic flux. In solar flares, the particle acceleration processes at work in impulsive events are related to excitation of plasma waves that are essentially independent of the ...
WHAT MAKES A STAR SO SPECIAL Abstract
... 1. The teacher introduces the physical characteristics of stars and the spectral classification to the students (you can use the information from the Introduction section as a supplement to the lesson about Star characteristics in the textbook you are using). 2. The teacher gives every student an en ...
... 1. The teacher introduces the physical characteristics of stars and the spectral classification to the students (you can use the information from the Introduction section as a supplement to the lesson about Star characteristics in the textbook you are using). 2. The teacher gives every student an en ...
A Digital Spectral Classification Atlas
... 29 are from that book), this atlas should not be redistributed either electronically or in hardcopy form. I urge you to buy the book when it comes out! Many, but not all of the spectra in this atlas were obtained with the Gray/Miller spectrograph on the 0.8 meter telescope of the Dark Sky Observator ...
... 29 are from that book), this atlas should not be redistributed either electronically or in hardcopy form. I urge you to buy the book when it comes out! Many, but not all of the spectra in this atlas were obtained with the Gray/Miller spectrograph on the 0.8 meter telescope of the Dark Sky Observator ...
File
... The last and final star is called the Alpheratz. This connects all three stars of Pegasus. It is the most prominent in the sky towards the end of Summer and through Autumn for the northern latitudes. ...
... The last and final star is called the Alpheratz. This connects all three stars of Pegasus. It is the most prominent in the sky towards the end of Summer and through Autumn for the northern latitudes. ...
On the nature of sn stars. I. A detailed abundance study
... and non-sn stars, to determine the possible relation between sn and CP stars and compare their chemical abundances. That most sn stars belong to open clusters allows us to search for a possible relation with fundamental parameters, including the age and rotation. We also study the possible contribut ...
... and non-sn stars, to determine the possible relation between sn and CP stars and compare their chemical abundances. That most sn stars belong to open clusters allows us to search for a possible relation with fundamental parameters, including the age and rotation. We also study the possible contribut ...
Evidence for the Tidal Destruction of Hot Jupiters by Subgiant Stars
... Figure 2. Galactic U V W kinematics of subgiant stars that host exoplanets discovered with the radial-velocity technique. In each panel, we plot the U V W space motions of the subgiant sample as blue points and the density of points in a control sample selected from the Hipparcos catalog as the back ...
... Figure 2. Galactic U V W kinematics of subgiant stars that host exoplanets discovered with the radial-velocity technique. In each panel, we plot the U V W space motions of the subgiant sample as blue points and the density of points in a control sample selected from the Hipparcos catalog as the back ...
Have You Seen Canopus Tonight?
... But, have you seen Canopus tonight? Many of us know the names Procyon, Capella and Spica. To many, Pollux, Castor, and Arcturus are familiar. Others know Polaris directs us north and no star is closer to our solar system than the Alpha Centauri system. Betelgeuse and Rigel help outline winter’s Orio ...
... But, have you seen Canopus tonight? Many of us know the names Procyon, Capella and Spica. To many, Pollux, Castor, and Arcturus are familiar. Others know Polaris directs us north and no star is closer to our solar system than the Alpha Centauri system. Betelgeuse and Rigel help outline winter’s Orio ...
Chapter 12
... by which the star shifts is extremely small. It was not until the 1830s that the first parallax was measured by the German astronomer Friedrich Bessel at Königsberg Observatory (now in Kaliningrad). Even now, the method fails for most stars farther away than about 100 parsecs because the Earth’s atm ...
... by which the star shifts is extremely small. It was not until the 1830s that the first parallax was measured by the German astronomer Friedrich Bessel at Königsberg Observatory (now in Kaliningrad). Even now, the method fails for most stars farther away than about 100 parsecs because the Earth’s atm ...
5 Report of the Panel on Stars and Stellar Evolution
... The opening of new parts of the electromagnetic spectrum dramatically broadened our view of stellar phenomena, leading to a number of breakthrough discoveries. Newly discovered radio pulsars in binaries, including the unique double pulsar system, provide some of the most stringent tests of general r ...
... The opening of new parts of the electromagnetic spectrum dramatically broadened our view of stellar phenomena, leading to a number of breakthrough discoveries. Newly discovered radio pulsars in binaries, including the unique double pulsar system, provide some of the most stringent tests of general r ...
pvb-based star compositions
... and I were making into the crackle phenomenon, as reported in the September 2015 issue of AFN. Once its name came up, we began to hear of rumours that PVB was being used in both China and Malta, so I decided to try it out in a range of star compositions. It quickly became apparent that PVB, in addit ...
... and I were making into the crackle phenomenon, as reported in the September 2015 issue of AFN. Once its name came up, we began to hear of rumours that PVB was being used in both China and Malta, so I decided to try it out in a range of star compositions. It quickly became apparent that PVB, in addit ...
hwd_ewd_v3 - X-ray and Observational Astronomy Group
... INTRODUCTION Theoretical and observational study of stellar behaviour has provided white dwarfs with their evolutionary context as one end point of the life-cycle of stars. In general terms, all stars with masses below about eight times that of the Sun will pass through one or more red giant phases ...
... INTRODUCTION Theoretical and observational study of stellar behaviour has provided white dwarfs with their evolutionary context as one end point of the life-cycle of stars. In general terms, all stars with masses below about eight times that of the Sun will pass through one or more red giant phases ...
Astronomy Astrophysics - Niels Bohr Institutet
... of such ages has been obtained. Finally, we have computed individual Galactic orbits for all stars with adequate data. The resulting data set should place a wide range of studies of the evolution of the Galactic disk on a new and considerably improved footing. We caution, however, that no such thing ...
... of such ages has been obtained. Finally, we have computed individual Galactic orbits for all stars with adequate data. The resulting data set should place a wide range of studies of the evolution of the Galactic disk on a new and considerably improved footing. We caution, however, that no such thing ...
Rocky planetesimals as the origin of metals in DZ stars
... Spatial and kinematical data for these white dwarfs were obtained from the SDSS DR7 (Abazajian et al. 2009). This latest data release includes the USNO–SDSS derived proper motion catalogue of Munn et al. (2004) and its recent amendments (Munn et al. 2008), with statistical errors around 3 mas yr−1 . ...
... Spatial and kinematical data for these white dwarfs were obtained from the SDSS DR7 (Abazajian et al. 2009). This latest data release includes the USNO–SDSS derived proper motion catalogue of Munn et al. (2004) and its recent amendments (Munn et al. 2008), with statistical errors around 3 mas yr−1 . ...
Chemical composition of 90 F and G disk dwarfs
... The parallax is taken from the Hipparcos Satellite observations (ESA 1997). For most program stars, the relative error in the parallax is of the order of 5%. Only two stars in our sample have errors larger than 10%. From these accurate parallaxes, stellar distances and absolute magnitudes were obtai ...
... The parallax is taken from the Hipparcos Satellite observations (ESA 1997). For most program stars, the relative error in the parallax is of the order of 5%. Only two stars in our sample have errors larger than 10%. From these accurate parallaxes, stellar distances and absolute magnitudes were obtai ...
WILLIAM HERSCHEL AND THE `GARNET` STARS: μ CEPHEI AND
... this famous red star is not well documented. Prior to and after Herschel, the identification of this star was the subject of confusion in various catalogues and atlases. The case is complex and involves other stars in southern Cepheus, including double stars, found by Herschel in the course of his s ...
... this famous red star is not well documented. Prior to and after Herschel, the identification of this star was the subject of confusion in various catalogues and atlases. The case is complex and involves other stars in southern Cepheus, including double stars, found by Herschel in the course of his s ...
a wide-field survey for variable stars
... formation. To further complicate the picture, infrared observations indicate that T Tauri itself is part of a multiple system and suggest that the associated Hind’s Nebula may also contain a very young stellar object. This remarkable color image spans about 4 light-years across, at the estimated dis ...
... formation. To further complicate the picture, infrared observations indicate that T Tauri itself is part of a multiple system and suggest that the associated Hind’s Nebula may also contain a very young stellar object. This remarkable color image spans about 4 light-years across, at the estimated dis ...
Evolved, single, slowly rotating... but magnetically active
... grating A, camera 5 and the long collimator resulting in a resolving power of 38,000 at 6420 Å with the TI-5 CCD, and 32,000 with the F3KB CCD. The CFHT spectra were obtained with the Gecko coudé spectrograph and the Loral 20482 CCD (15 µ pixels) with an effective resolving power of 120,000 at 671 ...
... grating A, camera 5 and the long collimator resulting in a resolving power of 38,000 at 6420 Å with the TI-5 CCD, and 32,000 with the F3KB CCD. The CFHT spectra were obtained with the Gecko coudé spectrograph and the Loral 20482 CCD (15 µ pixels) with an effective resolving power of 120,000 at 671 ...
High-precision abundances of elements in solar twin stars: Trends
... Context. High-precision determinations of abundances of elements in the atmospheres of the Sun and solar twin stars indicate that the Sun has an unusual low ratio between refractory and volatile elements. This has led to the suggestion that the relation between abundance ratios, [X/Fe], and elementa ...
... Context. High-precision determinations of abundances of elements in the atmospheres of the Sun and solar twin stars indicate that the Sun has an unusual low ratio between refractory and volatile elements. This has led to the suggestion that the relation between abundance ratios, [X/Fe], and elementa ...
1 - Piscataway High School
... of the gas would weigh more than an automobile. In this degenerate matter, the pressure does not depend on temperature, and that means the pressure–temperature thermostat does not regulate energy production. When the temperature becomes hot enough, helium fusion begins to make energy, and the temper ...
... of the gas would weigh more than an automobile. In this degenerate matter, the pressure does not depend on temperature, and that means the pressure–temperature thermostat does not regulate energy production. When the temperature becomes hot enough, helium fusion begins to make energy, and the temper ...
Kinetic equilibrium of iron in the atmospheres of cool stars
... final discrimination with respect to hydrogen collisions is based on the condition that the surface gravities as determined by the Fe /Fe ionization equilibria are in agreement with their astrometric counterparts obtained from H parallaxes. High signal-to-noise, high-resolution échelle ...
... final discrimination with respect to hydrogen collisions is based on the condition that the surface gravities as determined by the Fe /Fe ionization equilibria are in agreement with their astrometric counterparts obtained from H parallaxes. High signal-to-noise, high-resolution échelle ...
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.