Late Summer Messier Objects
... In addition, they are well-placed only during the summer, when the nights are at their shortest and the logistics of observing are most problematic. But they are not quite as bad in this regard as the objects between RA 15 and RA 18, at least not for people who do most of their observing in the even ...
... In addition, they are well-placed only during the summer, when the nights are at their shortest and the logistics of observing are most problematic. But they are not quite as bad in this regard as the objects between RA 15 and RA 18, at least not for people who do most of their observing in the even ...
PowerPoint Presentation - 16. Properties of Stars
... • What is the most important property of a star? • A star’s most important property is its mass, which determines its luminosity and spectral type at each stage of its life. • What are the three major classes of binary star systems? • A visual binary is a pair of orbiting stars that we can see disti ...
... • What is the most important property of a star? • A star’s most important property is its mass, which determines its luminosity and spectral type at each stage of its life. • What are the three major classes of binary star systems? • A visual binary is a pair of orbiting stars that we can see disti ...
low-res - Communicating Astronomy with the Public Journal
... news is often overstated (Shortland and Gregory 1991, p. 8; Dunwoody 1986, p. 11). This perception has, in the case of astronomy, been shown to be false by Shaefer et al. (1999), who found that none of 403 evaluated newspaper articles on astronomy significantly mislead the reader. Furthermore, most ...
... news is often overstated (Shortland and Gregory 1991, p. 8; Dunwoody 1986, p. 11). This perception has, in the case of astronomy, been shown to be false by Shaefer et al. (1999), who found that none of 403 evaluated newspaper articles on astronomy significantly mislead the reader. Furthermore, most ...
starry night companion
... “Az” stands for azimuth, an Arabic word (as is altitude) for the position along the horizon; “bearing” is an alternative navigational term. Azimuth is measured in degrees from north, which has an azimuth of 0°, through east (which has an azimuth or a bearing of 90°), through south (180°) and west (2 ...
... “Az” stands for azimuth, an Arabic word (as is altitude) for the position along the horizon; “bearing” is an alternative navigational term. Azimuth is measured in degrees from north, which has an azimuth of 0°, through east (which has an azimuth or a bearing of 90°), through south (180°) and west (2 ...
A search for a new class of pulsating DA white dwarf stars in the DB
... a remarkable and intriguing fact that few helium atmosphere white dwarfs occur in the effective temperature range between 45 000 ≥ T eff ≥ 30, 000 K. The DOs and DBs are found on either side of this temperature range, but only a very few genuine helium atmosphere white dwarfs are found within it (se ...
... a remarkable and intriguing fact that few helium atmosphere white dwarfs occur in the effective temperature range between 45 000 ≥ T eff ≥ 30, 000 K. The DOs and DBs are found on either side of this temperature range, but only a very few genuine helium atmosphere white dwarfs are found within it (se ...
ASTRONOMY AND ASTROPHYSICS (ASTRO)
... ASTRO 102: North Star Astronomy Cr. 1. F.S. An entirely web-based course covering topics in observing the sky and navigation by the stars for students with little or no previous experience. The course combines material on common naked-eye phenomena, such as daily and seasonal variations in the sky, ...
... ASTRO 102: North Star Astronomy Cr. 1. F.S. An entirely web-based course covering topics in observing the sky and navigation by the stars for students with little or no previous experience. The course combines material on common naked-eye phenomena, such as daily and seasonal variations in the sky, ...
Do We Know of Any Maunder Minimum Stars?
... (Perryman et al. 1997; Perryman & ESA 1997). To increase the confidence in the results here, only those WMBV stars with more than two Keck observations are used in this work. The bulk of the ∼ 1000 stars in WMBV are currently being monitored for radial velocity variations and are typically bright, w ...
... (Perryman et al. 1997; Perryman & ESA 1997). To increase the confidence in the results here, only those WMBV stars with more than two Keck observations are used in this work. The bulk of the ∼ 1000 stars in WMBV are currently being monitored for radial velocity variations and are typically bright, w ...
classifying stars
... The brightness of a star depends on its size, temperature and distance from the earth. Some stars appear brighter to us on earth because they are much closer than others, astronomers call this apparent magnitude (HOW BRIGHT A STAR APPEARS.) However, if astronomers could take two stars and place them ...
... The brightness of a star depends on its size, temperature and distance from the earth. Some stars appear brighter to us on earth because they are much closer than others, astronomers call this apparent magnitude (HOW BRIGHT A STAR APPEARS.) However, if astronomers could take two stars and place them ...
Lecture 14
... “1 Light Year is the distance traveled by light in one year.” Relation to other units: 1 light year (ly) is equivalent to 0.31 pc 63,270 AU ...
... “1 Light Year is the distance traveled by light in one year.” Relation to other units: 1 light year (ly) is equivalent to 0.31 pc 63,270 AU ...
arXiv:1705.00964v1 [astro-ph.GA] 2 May 2017
... J1819+3845 might be related to the foreground, bright star Vega. We therefore examined whether ionized gas associated with foreground stars provides a good explanation for the IDV phenomenon. Although we continue to monitor PKS1322-110, it will be some time before that data set rivals the coverage o ...
... J1819+3845 might be related to the foreground, bright star Vega. We therefore examined whether ionized gas associated with foreground stars provides a good explanation for the IDV phenomenon. Although we continue to monitor PKS1322-110, it will be some time before that data set rivals the coverage o ...
Ardua et Astra: On the Calculation of the Dates of the Rising and
... rather than individual stars. In the case of a large constellation such as Pegasus, this can be extremely confusing: when we read for example in the Geminus parapegma that “On the 17th day of Leo, for Euctemon … the Horse rises”,21 to which star does this refer? Is it the first star of the constella ...
... rather than individual stars. In the case of a large constellation such as Pegasus, this can be extremely confusing: when we read for example in the Geminus parapegma that “On the 17th day of Leo, for Euctemon … the Horse rises”,21 to which star does this refer? Is it the first star of the constella ...
Astronomy and Astrophysics (ASTRO)
... ASTROPHYSICS (ASTRO) Courses primarily for undergraduates: ASTRO 102: North Star Astronomy Cr. 1. F.S. An entirely web-based course covering topics in observing the sky and navigation by the stars for students with little or no previous experience. The course combines material on common naked-eye ph ...
... ASTROPHYSICS (ASTRO) Courses primarily for undergraduates: ASTRO 102: North Star Astronomy Cr. 1. F.S. An entirely web-based course covering topics in observing the sky and navigation by the stars for students with little or no previous experience. The course combines material on common naked-eye ph ...
Starwalk Manual En
... If you have an iPhone 3GS/4/4S/5/5s/5c, iPad or iPad mini, tilt your device and the Star Spotter function will be activated. Star Walk™ uses the digital compass to learn which way you are looking. A live representation of what you see in the sky will appear on your display and the sky will start fol ...
... If you have an iPhone 3GS/4/4S/5/5s/5c, iPad or iPad mini, tilt your device and the Star Spotter function will be activated. Star Walk™ uses the digital compass to learn which way you are looking. A live representation of what you see in the sky will appear on your display and the sky will start fol ...
Shortв•`lived radioactivity in the early solar system: The Superв•`AGB
... investigating Super-AGB production of SLR heavier than iron, such as 107Pd. ...
... investigating Super-AGB production of SLR heavier than iron, such as 107Pd. ...
On the doctoral thesis of Ms Germaine (Elizabeth) Teissier
... interspersed with emotional digressions about various subjects and quotes that have nothing to do with the subject matter at that point. It's even not clearly defined what the thesis is about. The whole thing seems more meant to be an intellectual show-off (and a poor one at that) than an academic d ...
... interspersed with emotional digressions about various subjects and quotes that have nothing to do with the subject matter at that point. It's even not clearly defined what the thesis is about. The whole thing seems more meant to be an intellectual show-off (and a poor one at that) than an academic d ...
Cosmic variance in [O/Fe] in the Galactic disk
... of stars to the interstellar medium (ISM). At a given location within a galaxy, slower supernova (or star formation) rates and higher variance in the yields from different stars will contribute to higher cosmic variance in chemical abundances. If two metals are produced in the same proportions in su ...
... of stars to the interstellar medium (ISM). At a given location within a galaxy, slower supernova (or star formation) rates and higher variance in the yields from different stars will contribute to higher cosmic variance in chemical abundances. If two metals are produced in the same proportions in su ...
looking up! - Discover the universe
... • Sun: The Sun, our star, dominates the daytime sky. It’s interesting to mention to students that the Sun is a star like the others we see at night. It’s simply much closer to us. So in reality, it’s appropriate to say that we can see stars during the day and at night! • Moon: Most people are surp ...
... • Sun: The Sun, our star, dominates the daytime sky. It’s interesting to mention to students that the Sun is a star like the others we see at night. It’s simply much closer to us. So in reality, it’s appropriate to say that we can see stars during the day and at night! • Moon: Most people are surp ...
Hertzsprung-Russell Diagram Outline
... In 1911, Ejnar Hertzsprung investigated the relationship between luminosity and colors of stars in within clusters. ...
... In 1911, Ejnar Hertzsprung investigated the relationship between luminosity and colors of stars in within clusters. ...
Seasons and the Appearance of the Sky
... © 2007 Pearson Education Inc., publishing as Pearson Addison-Wesley ...
... © 2007 Pearson Education Inc., publishing as Pearson Addison-Wesley ...
Astrophysics Pristine CNO abundances from Magellanic Cloud B stars
... It is a priori unclear which of the two data sets reflects the pristine LMC N abundance. There are many possible explanations for the peculiar behaviour of N: either the H ii-region value is systematically too low (note that it is – like all the other H ii-region data – exclusively based on 30 Dor a ...
... It is a priori unclear which of the two data sets reflects the pristine LMC N abundance. There are many possible explanations for the peculiar behaviour of N: either the H ii-region value is systematically too low (note that it is – like all the other H ii-region data – exclusively based on 30 Dor a ...
Examining the M67 Classification as an Open Cluster
... taken from the Atlas Image website. Using these photographs (Figures 3 and 4) and this Rclust, finally we estimated the total number of stars in the system N clust 1200 . Figure 5 shows the observed color-magnitude, mvis vs. B - V , diagram (or the HR diagram) for M67, based on our observation ...
... taken from the Atlas Image website. Using these photographs (Figures 3 and 4) and this Rclust, finally we estimated the total number of stars in the system N clust 1200 . Figure 5 shows the observed color-magnitude, mvis vs. B - V , diagram (or the HR diagram) for M67, based on our observation ...
View the sky`s greatest nebula
... clouds of dust and gas. In the winter, we see the sky opposite the stellar traffic jam found toward the galaxy’s center. The winter Milky Way is there, but you need a dark sky to see it with unaided eyes. The winter sky is the brightest of the seasonal skies — it contains the highest concentration o ...
... clouds of dust and gas. In the winter, we see the sky opposite the stellar traffic jam found toward the galaxy’s center. The winter Milky Way is there, but you need a dark sky to see it with unaided eyes. The winter sky is the brightest of the seasonal skies — it contains the highest concentration o ...
Discovery of extremely lead-rich subdwarfs: does heavy metal signal
... absorption line at 4049.8 Å and weaker lines at 3962.5 and 4496.1 Å. These have been identified from the National Institute of Standards and Technology (NIST) atomic data base to be due to Pb IV (Kramida et al. 2012). HE 1256−2738 also shows the Pb IV lines at 4049.8 and 3962.5 Å; 4496.1 Å is too we ...
... absorption line at 4049.8 Å and weaker lines at 3962.5 and 4496.1 Å. These have been identified from the National Institute of Standards and Technology (NIST) atomic data base to be due to Pb IV (Kramida et al. 2012). HE 1256−2738 also shows the Pb IV lines at 4049.8 and 3962.5 Å; 4496.1 Å is too we ...
Astronomy and Stonehenge
... looking at alignment evidence it is important to think in terms of events within certain azimuth ranges as well as at particular azimuths. In considering prehistoric astronomy it is common to apply a ‘recipe book’ of solar and lunar horizon targets which at minimum consists of the rising or setting ...
... looking at alignment evidence it is important to think in terms of events within certain azimuth ranges as well as at particular azimuths. In considering prehistoric astronomy it is common to apply a ‘recipe book’ of solar and lunar horizon targets which at minimum consists of the rising or setting ...
Constellation
In modern astronomy, a constellation is a specific area of the celestial sphere as defined by the International Astronomical Union (IAU). These areas had their origins in Western-traditional asterisms from which the constellations take their names. There are 88 officially recognized constellations, covering the entire sky.Thus, any given point in a celestial coordinate system can unambiguously be assigned to a constellation. It is usual in astronomy to give the constellation in which a given object is found along with its coordinates in order to convey a rough idea in which part of the sky it is located. For example, saying the Horsehead Nebula is near Orion's Belt in the constellation Orion immediately locates it just south of the ecliptic and conveys that it is best observable in winter from the Northern Hemisphere.