1998 - Universitäts-Sternwarte München
... found to be metal-poor objects – as opposed to the understanding when they were first analyzed in the 1950s. Interestingly, these stars also reveal a very different kinematic behaviour in that they do not take share in the rotation of the Galactic disk, i.e. they constitute a different stellar popul ...
... found to be metal-poor objects – as opposed to the understanding when they were first analyzed in the 1950s. Interestingly, these stars also reveal a very different kinematic behaviour in that they do not take share in the rotation of the Galactic disk, i.e. they constitute a different stellar popul ...
The Life Cycle of Stars: Supernovae in Starbursts by Jason Kezwer
... to search for obscured supernovae in this extreme star forming environment. This monitoring program was aimed as a feasibility study to determine the practicality of a large scale near-IR LIRG/ULIRG imaging survey. Establishing the supernova rate in these dusty galaxies is an important step toward c ...
... to search for obscured supernovae in this extreme star forming environment. This monitoring program was aimed as a feasibility study to determine the practicality of a large scale near-IR LIRG/ULIRG imaging survey. Establishing the supernova rate in these dusty galaxies is an important step toward c ...
Unraveling the Helix Nebula: Its Structure and Knots
... use the coordinate based system introduced in OB1997, thus avoiding the confusion of a discovery-time based system. We give figures labeling features at decreasing surface brightness and increasing size in Figure 3, Figure 6, and Figure 17. We describe the new high resolution HST and broader field ...
... use the coordinate based system introduced in OB1997, thus avoiding the confusion of a discovery-time based system. We give figures labeling features at decreasing surface brightness and increasing size in Figure 3, Figure 6, and Figure 17. We describe the new high resolution HST and broader field ...
- StealthSkater
... These stars quite likely have planets. Indeed, one 'M' star (known as Barnard's star) is believed to almost certainly have at least one (and 2-or-3) Jupiter-sized planets. Peter Van de Kamp of the Sproul Observatory at Swarthmore College (PA) has watched Barnard's star for over 3 decades and is conv ...
... These stars quite likely have planets. Indeed, one 'M' star (known as Barnard's star) is believed to almost certainly have at least one (and 2-or-3) Jupiter-sized planets. Peter Van de Kamp of the Sproul Observatory at Swarthmore College (PA) has watched Barnard's star for over 3 decades and is conv ...
ancient cultures 114 - Stellenbosch University
... astronomical texts, known as astrolabes, had already appeared – texts which made use of astronomical observations to serve calendar functions. During the Neo-Assyrian period (9th-7th centuries BCE), individual scholars were tasked to observing the heavens in order to make predictions of the future f ...
... astronomical texts, known as astrolabes, had already appeared – texts which made use of astronomical observations to serve calendar functions. During the Neo-Assyrian period (9th-7th centuries BCE), individual scholars were tasked to observing the heavens in order to make predictions of the future f ...
Astronomers` Observing Guides
... scheme of things. The second covers observing techniques, instrumental considerations and suggested activities and programs for the telescope user. ...
... scheme of things. The second covers observing techniques, instrumental considerations and suggested activities and programs for the telescope user. ...
A Comet-Hunter`s Legacy -
... all the way from the infrared, to the X-ray region. Each hundred-million year passage will probably bring the two galaxies closer together. At first, this will probably produce more and more extreme waves of star formation; but within a few billion years, the two galaxies should tear each other to p ...
... all the way from the infrared, to the X-ray region. Each hundred-million year passage will probably bring the two galaxies closer together. At first, this will probably produce more and more extreme waves of star formation; but within a few billion years, the two galaxies should tear each other to p ...
A Spitzer mid-infrared spectral survey of mass
... one oxygen-rich star) in the Large Magellanic Cloud (LMC). The stars represent the superwind phase on the asymptotic giant branch (AGB), which forms a major source of dust for the interstellar medium (ISM) in galaxies. Bolometric magnitudes indicate progenitor masses of 1.5–2.5 M . The spectra cove ...
... one oxygen-rich star) in the Large Magellanic Cloud (LMC). The stars represent the superwind phase on the asymptotic giant branch (AGB), which forms a major source of dust for the interstellar medium (ISM) in galaxies. Bolometric magnitudes indicate progenitor masses of 1.5–2.5 M . The spectra cove ...
Altas Farnese
... will reveal the latitude and epoch for the observations incorporated in the Atlas; and indeed these will specify enough information that we can identify the observer. Independently, a detailed comparison of the constellation symbols on the Atlas with those from the other surviving ancient material a ...
... will reveal the latitude and epoch for the observations incorporated in the Atlas; and indeed these will specify enough information that we can identify the observer. Independently, a detailed comparison of the constellation symbols on the Atlas with those from the other surviving ancient material a ...
Stars, Galaxies, Superuniverses and the Urantia Book, by Frederick
... "Your world, Urantia, is one of many similar inhabited planets which comprise the local universe of Nebadon. This universe, together with similar creations, makes up the superuniverse of Orvonton, from whose capital, Uversa, our commission hails. Orvonton is one of the seven evolutionary superuniver ...
... "Your world, Urantia, is one of many similar inhabited planets which comprise the local universe of Nebadon. This universe, together with similar creations, makes up the superuniverse of Orvonton, from whose capital, Uversa, our commission hails. Orvonton is one of the seven evolutionary superuniver ...
The white dwarf population within 40 pc of the Sun
... Finally, we mention that the total number of synthetic stars of the restricted samples described below and the observed sample are always similar. In this way we guarantee that the comparison of both sets of data are statistically sound. To produce a consistent white dwarf population, we first gener ...
... Finally, we mention that the total number of synthetic stars of the restricted samples described below and the observed sample are always similar. In this way we guarantee that the comparison of both sets of data are statistically sound. To produce a consistent white dwarf population, we first gener ...
Stellar evolution - Statistical Physics Group
... There are of course still some uncertainties in the basic physics of stellar interiors and these will be mentioned later. As soon as it was realized that nuclear reactions in an unmixed star could lead to the formation of a red giant, the predictions of the evolutionary theory were compared with the ...
... There are of course still some uncertainties in the basic physics of stellar interiors and these will be mentioned later. As soon as it was realized that nuclear reactions in an unmixed star could lead to the formation of a red giant, the predictions of the evolutionary theory were compared with the ...
Stellarium User Guide
... how the sky would look to an observer depending on their location and the time. It can also draw the constellations and simulate astronomical phenomena such as meteor showers, and solar or lunar eclipses. It can also display how the sky will look from any other position in our solar system. Stellari ...
... how the sky would look to an observer depending on their location and the time. It can also draw the constellations and simulate astronomical phenomena such as meteor showers, and solar or lunar eclipses. It can also display how the sky will look from any other position in our solar system. Stellari ...
Mapping of the extinction in giant molecular clouds using optical star
... between m − 1/2 and m + 1/2) in each cell of a regular rectangular grid in an obscured area and to compare the result with the counts obtained in a supposedly unextinguished region. In order to improve the spatial resolution, Bok (1956) proposed to make count up to the completeness limiting magnitud ...
... between m − 1/2 and m + 1/2) in each cell of a regular rectangular grid in an obscured area and to compare the result with the counts obtained in a supposedly unextinguished region. In order to improve the spatial resolution, Bok (1956) proposed to make count up to the completeness limiting magnitud ...
- National Optical Astronomy Observatory
... information to determine the desired stepping rate for the limb guider translation stage and the number of spectral frame to collect. (Take into account that one slit width is about half an arcsecond and the diffraction limit of the telescope at 5 microns is ~0.8 arcseconds. Spatially sampling at ~0 ...
... information to determine the desired stepping rate for the limb guider translation stage and the number of spectral frame to collect. (Take into account that one slit width is about half an arcsecond and the diffraction limit of the telescope at 5 microns is ~0.8 arcseconds. Spatially sampling at ~0 ...
Navigating the Night Sky Checklist
... The ecliptic marks the path of the sun. It’s the projection of Earth’s orbit onto the sky. And it’s an essential part of any stargazer’s vocabulary. ...
... The ecliptic marks the path of the sun. It’s the projection of Earth’s orbit onto the sky. And it’s an essential part of any stargazer’s vocabulary. ...
The redshift of extragalactic nebulae
... However, the finding of a uniform distribution of nebulae up to the greatest attainable distances with a method that requires the virtual absence of absorption and scattering is, in itself almost a proof of the correctness of this assumption. In fact, an actually existing uniform distribution of neb ...
... However, the finding of a uniform distribution of nebulae up to the greatest attainable distances with a method that requires the virtual absence of absorption and scattering is, in itself almost a proof of the correctness of this assumption. In fact, an actually existing uniform distribution of neb ...
Astrometric accuracy during the past 2000 years
... catalogue, and it is certainly too small because of the unknown systematic errors. The three tables should ideally contain the “external errors” of a catalogue entry as would be obtained from a comparison with a more accurate catalogue. Such comparison could be carried out with any of the older cata ...
... catalogue, and it is certainly too small because of the unknown systematic errors. The three tables should ideally contain the “external errors” of a catalogue entry as would be obtained from a comparison with a more accurate catalogue. Such comparison could be carried out with any of the older cata ...
Magnetic cycles of Sun-like stars with different levels of coronal and
... program of observations of Sun-like stars (see Baliunas et al. 1995; Lockwood et al. 2007). One of the most important results of the HK-project was the discovery of ”11-yr” cycles of activity in Sun-like stars. Durations of CA cycles, found for 50 different stars of late spectral classes (F, G and K ...
... program of observations of Sun-like stars (see Baliunas et al. 1995; Lockwood et al. 2007). One of the most important results of the HK-project was the discovery of ”11-yr” cycles of activity in Sun-like stars. Durations of CA cycles, found for 50 different stars of late spectral classes (F, G and K ...
Corona Australis
Corona Australis /kɵˈroʊnə ɒˈstreɪlɨs/ or Corona Austrina /kɵˈroʊnə ɒˈstraɪnə/ is a constellation in the Southern Celestial Hemisphere. Its Latin name means ""southern crown"", and it is the southern counterpart of Corona Borealis, the northern crown. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations. The Ancient Greeks saw Corona Australis as a wreath rather than a crown and associated it with Sagittarius or Centaurus. Other cultures have likened the pattern to a turtle, ostrich nest, a tent, or even a hut belonging to a rock hyrax.Although fainter than its namesake, the oval- or horseshoe-shaped pattern of its brighter stars renders it distinctive. Alpha and Beta Coronae Australis are the two brightest stars with an apparent magnitude of around 4.1. Epsilon Coronae Australis is the brightest example of a W Ursae Majoris variable in the southern sky. Lying alongside the Milky Way, Corona Australis contains one of the closest star-forming regions to our Solar System—a dusty dark nebula known as the Corona Australis Molecular Cloud, lying about 430 light years away. Within it are stars at the earliest stages of their lifespan. The variable stars R and TY Coronae Australis light up parts of the nebula, which varies in brightness accordingly.