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Open clusters in the Third Galactic Quadrant III. Alleged binary
Open clusters in the Third Galactic Quadrant III. Alleged binary

... diagrams (CMDs). As said above, a different from solar metal content may become evident in some clusters from the reddening estimation. Therefore, we applied the same metal content set of isochronous lines (Girardi et al. 2000) until the best MS match is achieved in the CMD. The method is exemplified ...
Constellation Paper - Matt Hape`s Portfolio
Constellation Paper - Matt Hape`s Portfolio

... after Sirius B and Procyon B. It has a stellar classification of DZ8 meaning it has heavier elements than helium in its spectrum. From this information we can deduct that at one point this was a very massive hot star. This star was discovered in 1917 by an astronomer named Adriaan Van Maanen. Due to ...
Notable long-period eclipsing binaries. Part I. - Project VS
Notable long-period eclipsing binaries. Part I. - Project VS

... the chance to study the characteristics of isolated stars with a high degree of precision and accuracy. The most interesting fact about eclipsing binaries is that all kinds of stars are found as members of binaries: from normal main sequence stars, variable stars, evolved giants and supergiants, to ...
Properties of White Dwarfs, Teacher Guide
Properties of White Dwarfs, Teacher Guide

... 1. Show the first frame to display a star map of stars in the constellations Canis Major and Orion. Tell students a little about Sirius and where it is:  Point out Sirius, the brightest visible-light star in the sky (besides our Sun).  The stars grouped into Canis Major and Orion are best viewed d ...
Chapter 12
Chapter 12

... seems to move against the background even though in reality it is your head that has changed position, not your hand. This simple demonstration illustrates how parallax gives a clue to an object’s distance. If you hold your hand at different distances from your face, you will notice that the apparen ...
The 2008 RBSE Journal - National Optical Astronomy Observatory
The 2008 RBSE Journal - National Optical Astronomy Observatory

... and usually end up being bigger than the originating galaxy. The smallest known are only a few tens of parsecs across, while the largest are known to be up to several megaparsecs. The average radio galaxy is usually typically hundreds of kiloparsecs across. This is about twice the size of the Milky ...
What To See Telescope(Jul-Sept) v1 - One
What To See Telescope(Jul-Sept) v1 - One

... constellation takes its name from the classical mythological figure of the same name. The hero is depicted in the sky kneeling, praying to Zeus for strength to finish his legendary great labors. The constellation is home to an extremely distant supercluster of galaxies, most of which are beyond the ...
How to Build an Astrolabe
How to Build an Astrolabe

... Greece, were extensively developed in the medieval Islamic world and became the key astronomical instrument of the western middle ages. When mapping the heavens astronomers assume that the stars seen in the night sky are all at an equal distance from the earth, fixed on the inside of an enormous sph ...
How to Build an Astrolabe - St John`s College, Cambridge
How to Build an Astrolabe - St John`s College, Cambridge

... Greece, were extensively developed in the medieval Islamic world and became the key astronomical instrument of the western middle ages. When mapping the heavens astronomers assume that the stars seen in the night sky are all at an equal distance from the earth, fixed on the inside of an enormous sph ...
File
File

... the monster whose gaze turned people into stone. When Perseus decapitated her. It was tamed by the hero whose name was Bellerophon, the son of the Corinthian king Glaucus and the grandson of Sisyphus. The hero helped the Goddess Athena. In Greek mythology, he is best known for slaying the Chimera, a ...
AAVSO: Epsilon Aurigae
AAVSO: Epsilon Aurigae

... recorded another dimming event in 1874-1875, and yet another was recorded in 1901-1902. Based on all of the observational evidence to date, Ludendorff suggested the object is similar to the Algol variables, now known to be eclipsing binaries that interact when one star transfers matter to the other. ...
Sample pages 1 PDF
Sample pages 1 PDF

... especially nearby, a mere 1,300 light years away. It is visible even to the naked eye, as a fuzzy patch halfway down the Sword of Orion asterism. A small telescope reveals its two brightest regions, the larger of which is M42 (NGC 1976) and the other M43 (NGC 1982). The Orion Molecular Cloud Complex ...
The Stars - Springer
The Stars - Springer

...  Many stars are variable so the value for the apparent magnitude will change. Any variable will have the suffix v, and the value given will be the mean value. ...
2 The Concept of “Spectral Classes”
2 The Concept of “Spectral Classes”

... peculiarities that can appear “globally” across large regions of the HR Diagram. They are mutually duplicative in order to represent as many as two global peculiarities. Codes P3 and P4 are included to specify more fully the peculiarities that often cannot be represented by P1 and P2 alone. Peculiar ...
Sample pages 1 PDF
Sample pages 1 PDF

... gazed with bewilderment at its beauty? And did you think something like this as you watched: ‘‘How many stars there are! How can anyone make any sense of this mass of stars?’’ An attentive observer will soon notice that individual bright stars that are rather close together in the sky seem to form s ...
Red supergiants and the past of Cygnus OB2
Red supergiants and the past of Cygnus OB2

... Mengel & Tacconi-Garman 2007). At the same time, their presence and characteristics would set relevant lower limits on the past massive star formation activity of the region. In this paper we report on seven red supergiants located within or near the boundaries of Cygnus OB2 and consistent with bein ...
Star 1 A star is a massive, luminous ball of plasma held together by
Star 1 A star is a massive, luminous ball of plasma held together by

... Edmond Halley published the first measurements of the proper motion of a pair of nearby "fixed" stars, demonstrating that they had changed positions from the time of the ancient Greek astronomers Ptolemy and Hipparchus. The first direct measurement of the distance to a star (61 Cygni at 11.4 light-y ...
Archaeoastronomical Study of the Main Pyramids of Giza
Archaeoastronomical Study of the Main Pyramids of Giza

... called the “Chief of the Observers”, and this testified that during the Old Kingdom astronomical observations were surely one of the main duties of some Egyptian priests (Magli, 2009a). In addition, during this early period, Egyptians knew the five planets Mercury, Venus, Mars, Jupiter and Saturn, d ...
PPT presentation
PPT presentation

... Those pose no confusion problem because of their extended nature. • Two point sources bright in the on-band and fainter but visible in the offband. Could be high-z quasars or star forming regions or even a PN within a globular cluster in NGC 4697, as reported recently in the case of NGC 5128 by Minn ...
Educator`s Guide
Educator`s Guide

... educator to make “overheads” for the lesson. The lesson plans and labs are presented in a format that states the objective, purpose, required material, procedures and forms of assessment. A listing of all the National Educational Standards, that this manual complies with, are found in the appendix. ...
Legends Night Sky Orion
Legends Night Sky Orion

... educator to make “overheads” for the lesson. The lesson plans and labs are presented in a format that states the objective, purpose, required material, procedures and forms of assessment. A listing of all the National Educational Standards, that this manual complies with, are found in the appendix. ...
Late Summer Messier Objects
Late Summer Messier Objects

... and the fact that many of its signature stars are only third magnitude. Although Sagittarius means "archer", most modern astronomers prefer to picture it as a teapot, with the handle on the east and the Milky Way issuing out of the open spout on the northwest. The only genuinely bright stars in the ...
Physics 1040 Constellation paper
Physics 1040 Constellation paper

... both Callisto and Arcas into the sky as bears, to prevent the killing, these became known to us as Ursa Major and Ursa Minor or the Great Bear and the Little Bear. It is said that Zeus threw both Callisto and Arcas into the sky by their tails which is why both bears in the sky have very long tails. ...
VY Canis Majoris: The Astrophysical Basis of Its Luminosity
VY Canis Majoris: The Astrophysical Basis of Its Luminosity

... Flower 1977) yields Tef f ∼ 3200◦ for an M4-M5 star. However, one should be cautious in the case of VY CMa; we are not observing either its photosphere or its surface directly. It has been known for some time that VY CMa’s absorption spectrum is significantly redshifted with respect to its systemic ...
Cataclysmic Cosmic Events and How to Observe Them www.springer.com/series/5338
Cataclysmic Cosmic Events and How to Observe Them www.springer.com/series/5338

... their violence and energy output. Active galaxies, containing supermassive black holes at their centers, can swallow a solar mass every month, releasing huge amounts of energy that amateur astronomers can observe as a fluctuation in light output. The luminosity of some of these objects is truly mind ...
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Canis Major

Canis Major /ˌkeɪnɨs ˈmeɪdʒər/ is a constellation in the southern celestial hemisphere. In the second century, it was included in Ptolemy's 48 constellations, and is counted among the 88 modern constellations. Its name is Latin for ""greater dog"" in contrast to Canis Minor, the ""lesser dog""; both figures are commonly represented as following the constellation of Orion the hunter through the sky. The Milky Way passes through Canis Major and several open clusters lie within its borders, most notably M41.Canis Major contains Sirius, the brightest star in the night sky, known as the ""dog star"". It is bright because of its proximity to our Solar System. In contrast, the other bright stars of the constellation are stars of great distance and high luminosity. At magnitude 1.5, Epsilon Canis Majoris (Adhara) is the second brightest star of the constellation and the brightest source of extreme ultraviolet radiation in the night sky. Next in brightness are the yellow-white supergiant Delta (Wezen) at 1.8, the blue-white giant Beta (Mirzam) at 2.0, blue-white supergiants Eta (Aludra) at 2.4 and Omicron1 at 3.0, and white spectroscopic binary Zeta (Furud), also at 3.0. The red hypergiant VY Canis Majoris is one of the largest stars known, while the neutron star RX J0720.4-3125 has a radius of a mere 5 km.
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