Cepheid
... Milky Way, different from the spiral nebulae. We now realize that they are ‘dwarf’ galaxies in their own right (but not spirals). ...
... Milky Way, different from the spiral nebulae. We now realize that they are ‘dwarf’ galaxies in their own right (but not spirals). ...
Astronomical Geography: An Examination of the Early American
... "The number of stars visible to the naked eye at anyone time in the upper hemisphere is not more than a thousand. A thousand more are supposed to be visible in the lower hemisphere; and by the help of a telescope, a thousand more have been discovered; so that the whole number of stars are reckoned a ...
... "The number of stars visible to the naked eye at anyone time in the upper hemisphere is not more than a thousand. A thousand more are supposed to be visible in the lower hemisphere; and by the help of a telescope, a thousand more have been discovered; so that the whole number of stars are reckoned a ...
Neon abundances - UCL Astrophysics Group
... Explorer (IUE) on the ultraviolet resonance lines of iron-peak elements in 26 HgMn, four superficially normal and 10 normal stars. We observed definite detections or determined upper limits for Ne i in 21 of the HgMn stars in the Smith & Dworetsky (1993) sample, and in 11 of the normal and superfici ...
... Explorer (IUE) on the ultraviolet resonance lines of iron-peak elements in 26 HgMn, four superficially normal and 10 normal stars. We observed definite detections or determined upper limits for Ne i in 21 of the HgMn stars in the Smith & Dworetsky (1993) sample, and in 11 of the normal and superfici ...
THE N/O RATIO IN EARLY B-TYPE MAIN SEQUENCE STARS AS
... This paper is based on previous studies of MS B-stars which were published between 2000 and 2008 by Lyubimkov, et al. [8-12]. High resolution spectra for more than 100 MS B-stars were obtained [8] at two observatories, the Crimean Astrophysical Observatory and the MacDonald Observatory of the Unive ...
... This paper is based on previous studies of MS B-stars which were published between 2000 and 2008 by Lyubimkov, et al. [8-12]. High resolution spectra for more than 100 MS B-stars were obtained [8] at two observatories, the Crimean Astrophysical Observatory and the MacDonald Observatory of the Unive ...
Celestial Motions
... • Why do we see a band of light called the Milky Way in our sky? • It traces the Galactic plane as it appears from our location in the Milky Way Galaxy. © 2004 Pearson Education Inc., publishing as Addison-Wesley ...
... • Why do we see a band of light called the Milky Way in our sky? • It traces the Galactic plane as it appears from our location in the Milky Way Galaxy. © 2004 Pearson Education Inc., publishing as Addison-Wesley ...
Stellar Masses
... In 2001, a very low mass star (lower than a tenth of a solar mass), located at a distance of only 13 light years, designated as DENIS-P J104814.7-395606.1, was found on the infrared survey DENIS images. On the night of 30 May 2000, the 10 m Keck I telescope was used to obtain a high-resolution spect ...
... In 2001, a very low mass star (lower than a tenth of a solar mass), located at a distance of only 13 light years, designated as DENIS-P J104814.7-395606.1, was found on the infrared survey DENIS images. On the night of 30 May 2000, the 10 m Keck I telescope was used to obtain a high-resolution spect ...
Unit 6
... As the Earth orbits the Sun, the stars that are visible each night change. The shift is so slow that it is difficult to appreciate from one night to the next, but in the span of a month the changes become obvious. Because these movements repeat after the Earth completes one orbit around the Sun—a ye ...
... As the Earth orbits the Sun, the stars that are visible each night change. The shift is so slow that it is difficult to appreciate from one night to the next, but in the span of a month the changes become obvious. Because these movements repeat after the Earth completes one orbit around the Sun—a ye ...
Archaeoastronomy at the Ames Plantation Mound Site Elizabeth A
... mounds. The mounds were used for burials, especially early on in their cultural development. Archaeologists have excavated mass graves where mounds were full of elite members of bodies, and frequently these large burials were accompanied by a great deal of artifacts. Some mounds contain only one bur ...
... mounds. The mounds were used for burials, especially early on in their cultural development. Archaeologists have excavated mass graves where mounds were full of elite members of bodies, and frequently these large burials were accompanied by a great deal of artifacts. Some mounds contain only one bur ...
M81/M82/NGC3077
... M81 — -35 km/sec (3.63 ± 0.34 Mpc) (CBR value: 48 km/sec) M82 — 202 km/sec (3.9 ± 0.3 Mpc) (CBR value: 296 km/sec) M81 is closer and approaching, while M82 is farther away and receding; ...
... M81 — -35 km/sec (3.63 ± 0.34 Mpc) (CBR value: 48 km/sec) M82 — 202 km/sec (3.9 ± 0.3 Mpc) (CBR value: 296 km/sec) M81 is closer and approaching, while M82 is farther away and receding; ...
Chapter 25 - Haiku Learning
... stars orbit each other. These pairs of stars, pulled toward each other by gravity, are called binary stars. More than 50 percent of the stars in the universe may occur in pairs or multiples. Binary stars are used to determine the star property most difficult to calculate—its mass. The mass of a body ...
... stars orbit each other. These pairs of stars, pulled toward each other by gravity, are called binary stars. More than 50 percent of the stars in the universe may occur in pairs or multiples. Binary stars are used to determine the star property most difficult to calculate—its mass. The mass of a body ...
The Mathematics of Astrology
... For example, Mercury was commonly known as the god of commerce, and hence the planet Mercury rules commerce in astrology. It is the same with Venus, the goddess of love. The other analogies are derived similarly. Another interesting point to note is that classical astrology worked with only five pla ...
... For example, Mercury was commonly known as the god of commerce, and hence the planet Mercury rules commerce in astrology. It is the same with Venus, the goddess of love. The other analogies are derived similarly. Another interesting point to note is that classical astrology worked with only five pla ...
Hariprasad comes from well known Jyotish family in Andhrapradesh
... upon close reading “Lagadhasya Mahatmanah” does not give that interpretation). This is the oldest Hindu Astronomical Text (full text not available – only some portions are available). Surya Sidhantha is the second oldest text after Vedanga Jyotisha - Author is unknown. It was gifted for the benefit ...
... upon close reading “Lagadhasya Mahatmanah” does not give that interpretation). This is the oldest Hindu Astronomical Text (full text not available – only some portions are available). Surya Sidhantha is the second oldest text after Vedanga Jyotisha - Author is unknown. It was gifted for the benefit ...
Orion – The Hunter - Guild of Students
... the scorpion in the night sky as the constellations Orion and Scorpius. She placed the scorpion opposite him, so that never are the two visible at once. The sky shows him followed by his two fighting dogs, Canis Major and Minor, and fighting a bull, Taurus. Oddly, the bull is completely irrelevant t ...
... the scorpion in the night sky as the constellations Orion and Scorpius. She placed the scorpion opposite him, so that never are the two visible at once. The sky shows him followed by his two fighting dogs, Canis Major and Minor, and fighting a bull, Taurus. Oddly, the bull is completely irrelevant t ...
Set 2 Astronomy questions
... W) the line that divides the sky into the northern half and the southern half X) the Sun's apparent path across the celestial sphere Y) the point directly overhead Z) the line on the celestial sphere directly above the celestial equator ANSWER: X) THE SUN'S APPARENT PATH ACROSS THE CELESTIAL SPHERE ...
... W) the line that divides the sky into the northern half and the southern half X) the Sun's apparent path across the celestial sphere Y) the point directly overhead Z) the line on the celestial sphere directly above the celestial equator ANSWER: X) THE SUN'S APPARENT PATH ACROSS THE CELESTIAL SPHERE ...
Finding the Most Distant Quasars Using Bayesian Selection Methods
... been almost completely ionised, as the first generations of stars—and quasars—emitted sufficient ultraviolet radiation to separate electrons from protons. The rest-frame wavelength of the break is at 0.1216 µm, but the wavelength of all light is increased by the cosmological expansion; the Universe ...
... been almost completely ionised, as the first generations of stars—and quasars—emitted sufficient ultraviolet radiation to separate electrons from protons. The rest-frame wavelength of the break is at 0.1216 µm, but the wavelength of all light is increased by the cosmological expansion; the Universe ...
the Colours of rainbow the Brook
... through woods and valleys. The brook narrates the story of its musical journey along these places. Imagery of sight and sound are blended in the poem by employing exquisite words and expressions. Summary:“The brook” has been written by “Alfred Tennyson”. The poem traces the life of a brook or small ...
... through woods and valleys. The brook narrates the story of its musical journey along these places. Imagery of sight and sound are blended in the poem by employing exquisite words and expressions. Summary:“The brook” has been written by “Alfred Tennyson”. The poem traces the life of a brook or small ...
Star Formation in Our Galaxy - Wiley-VCH
... regions, was first discovered here through detections of the Doppler shift in the 12 C16 O line. Observations of numerous other molecular species reveal that the impact of this wind on nearby gas has resulted in shock heating, which alters the pattern of chemical abundances in a characteristic manne ...
... regions, was first discovered here through detections of the Doppler shift in the 12 C16 O line. Observations of numerous other molecular species reveal that the impact of this wind on nearby gas has resulted in shock heating, which alters the pattern of chemical abundances in a characteristic manne ...
Binocular Objects (MS Word)
... This beautiful open cluster is easy to find being 6th magnitude but is not as spectacular as others. Some of the 80 stars in this cluster are arranged in pretty arcs. This may be seen naked eye on the best of nights. NGC 2244 and NGC 2237 Ten degrees east-southeast from Orion’s giant Betelgeuse, a n ...
... This beautiful open cluster is easy to find being 6th magnitude but is not as spectacular as others. Some of the 80 stars in this cluster are arranged in pretty arcs. This may be seen naked eye on the best of nights. NGC 2244 and NGC 2237 Ten degrees east-southeast from Orion’s giant Betelgeuse, a n ...
JRASC, June 2014 Issue (PDF, low resolution)
... of a historical, biographical, or educational nature of general interest to the astronomical community. All contributions are welcome, but the editors reserve the right to edit material prior to publication. Research papers are reviewed prior to publication, and professional astronomers with institu ...
... of a historical, biographical, or educational nature of general interest to the astronomical community. All contributions are welcome, but the editors reserve the right to edit material prior to publication. Research papers are reviewed prior to publication, and professional astronomers with institu ...
A Starscape in Red and Blue - Royal Astronomical Society of Canada
... of a historical, biographical, or educational nature of general interest to the astronomical community. All contributions are welcome, but the editors reserve the right to edit material prior to publication. Research papers are reviewed prior to publication, and professional astronomers with institu ...
... of a historical, biographical, or educational nature of general interest to the astronomical community. All contributions are welcome, but the editors reserve the right to edit material prior to publication. Research papers are reviewed prior to publication, and professional astronomers with institu ...
A History of Star Catalogues - The Albuquerque Astronomical Society
... contains a catalogue of 777 stars. (Watbooks-Brahe 2003) They are measured with far greater accuracy than any previous measurements. The book was printed between 1588 and 1598 by Tycho’s private press on the Island of Hven, where his observatory called Uranaborg was located. After Tycho died his ass ...
... contains a catalogue of 777 stars. (Watbooks-Brahe 2003) They are measured with far greater accuracy than any previous measurements. The book was printed between 1588 and 1598 by Tycho’s private press on the Island of Hven, where his observatory called Uranaborg was located. After Tycho died his ass ...
Absolute magnitudes and kinematics of barium
... with known orbits or with variable radial-velocity, there is no substantial difference between both groups. On the other hand, McWilliam (1990) analysed several stars from the Lü list (1991) and found no heavy-element overabundances, suggesting that the Lü compilation could be ”contaminated” with ...
... with known orbits or with variable radial-velocity, there is no substantial difference between both groups. On the other hand, McWilliam (1990) analysed several stars from the Lü list (1991) and found no heavy-element overabundances, suggesting that the Lü compilation could be ”contaminated” with ...
The cosmic origin of fluorine and sulphur
... Practically only the two lightest elements, hydrogen and helium, were formed during the Big Bang when our Universe was born. All other elements have been formed, and keep being formed, in different processes in different types of stars. is means that all atoms, except hydrogen and helium, that build ...
... Practically only the two lightest elements, hydrogen and helium, were formed during the Big Bang when our Universe was born. All other elements have been formed, and keep being formed, in different processes in different types of stars. is means that all atoms, except hydrogen and helium, that build ...
The surface composition of Beta Pictoris
... inferred by Paresce (1991) from Geneva photometry, a result that has prompted King and Patten (1992) to suggest that β Pic is a λ Boo star. We note that the HST GHRS data analyzed by Lanz and Hubeny (1995) also rule out a low metallicity, and that their own evaluation of Geneva indices leads to a no ...
... inferred by Paresce (1991) from Geneva photometry, a result that has prompted King and Patten (1992) to suggest that β Pic is a λ Boo star. We note that the HST GHRS data analyzed by Lanz and Hubeny (1995) also rule out a low metallicity, and that their own evaluation of Geneva indices leads to a no ...
... 2001) or an eclipsing binary. Nevertheless, further observations, under optimal whether conditions and a larger resolution optics, are necessary in order to classify this star. V37. The period 0.237 d, listed in Clement (2002), does not produce a smooth light curve but a rather dispersed cloud of po ...
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.