A spectroscopic study of detached binary systems using precise radial velocities
... are astrometric binaries: β Ret and ν Oct. The other SB1 systems were 94 Aqr A, θ Ant, and the 10-day system, HD 159656. The preliminary spectroscopic solution for θ Ant (P ∼ 18 years), is the first one derived for this system. The improvement to the precision achieved for the elements of the other ...
... are astrometric binaries: β Ret and ν Oct. The other SB1 systems were 94 Aqr A, θ Ant, and the 10-day system, HD 159656. The preliminary spectroscopic solution for θ Ant (P ∼ 18 years), is the first one derived for this system. The improvement to the precision achieved for the elements of the other ...
Astrometric accuracy during the past 2000 years
... The evolution has often been displayed in diagrams, showing the accuracy versus time. These diagrams have at least one thing in common, the improvement by many powers of ten from the one degree of Hipparchus, the Greek father of astronomy, to one milliarcsec for the diagrams including the Hipparcos ...
... The evolution has often been displayed in diagrams, showing the accuracy versus time. These diagrams have at least one thing in common, the improvement by many powers of ten from the one degree of Hipparchus, the Greek father of astronomy, to one milliarcsec for the diagrams including the Hipparcos ...
The Evolution of Molecular Clouds
... formation of molecular clouds must itself be a rather rapid process, and cannot take many dynamical timescales. Since the timescales for the formation, internal evolution, and destruction of molecular clouds are all of the same order, these processes probably cannot be clearly separated in time, and ...
... formation of molecular clouds must itself be a rather rapid process, and cannot take many dynamical timescales. Since the timescales for the formation, internal evolution, and destruction of molecular clouds are all of the same order, these processes probably cannot be clearly separated in time, and ...
Galaxy formation in the Planck cosmology - II. Star
... Voort (2015). The difference between the two reflects the merger history of galaxies. The term SFH is often loosely used in papers without being defined. Observationally, the only direct measure of SFHs corresponds to that described in this paper, i.e. the distribution of formation times of all the ...
... Voort (2015). The difference between the two reflects the merger history of galaxies. The term SFH is often loosely used in papers without being defined. Observationally, the only direct measure of SFHs corresponds to that described in this paper, i.e. the distribution of formation times of all the ...
114EQ-AR
... image will always appear upside down and reversed left-for-right. 2. Look through the red dot viewfinder. Turn one or more of the viewfinder’s alignment screws (34, Inset B) until the red dot is precisely over the same object as you centered in the eyepiece. 3. Check this alignment at night on a cel ...
... image will always appear upside down and reversed left-for-right. 2. Look through the red dot viewfinder. Turn one or more of the viewfinder’s alignment screws (34, Inset B) until the red dot is precisely over the same object as you centered in the eyepiece. 3. Check this alignment at night on a cel ...
A Determination of the Deflection of Light by the Sun`s Gravitational
... this was the race-course of the Jockey Club, and was provided with a covered grand stand, which we found most convenient for unpacking and storage and in the preparatory work. We laid down a meridian line, after which brick piers were constructed for the coelostats and for the steel tube of the astr ...
... this was the race-course of the Jockey Club, and was provided with a covered grand stand, which we found most convenient for unpacking and storage and in the preparatory work. We laid down a meridian line, after which brick piers were constructed for the coelostats and for the steel tube of the astr ...
Set 3 AStronomy questions
... 21) ASTRONOMY Short Answer A stargazer looks at Orion and sees a reddish star called Betelgeuse. The redness is because the star is what type of star? ANSWER: A RED GIANT BONUS 21) ASTRONOMY Short Answer What is the MOST common name for the celestial objects that are called stars but since they are ...
... 21) ASTRONOMY Short Answer A stargazer looks at Orion and sees a reddish star called Betelgeuse. The redness is because the star is what type of star? ANSWER: A RED GIANT BONUS 21) ASTRONOMY Short Answer What is the MOST common name for the celestial objects that are called stars but since they are ...
ASTRONOMY AND ASTROPHYSICS Barium and europium
... halo stars are of the r-process origin. Much observational efforts were invested in testing this idea. For extremely metalpoor stars with metallicities [Fe/H] ≤ −2.4 McWilliam (1998) has derived an average [Eu/Ba] = 0.69, consistent with pure rprocess nucleosynthesis provided that the data of Arland ...
... halo stars are of the r-process origin. Much observational efforts were invested in testing this idea. For extremely metalpoor stars with metallicities [Fe/H] ≤ −2.4 McWilliam (1998) has derived an average [Eu/Ba] = 0.69, consistent with pure rprocess nucleosynthesis provided that the data of Arland ...
114EQ-AR
... Observe during the daytime: Try out your telescope during the daytime at first. It is easier to learn how it operates and how to observe when it is light. Pick out an easy object to observe: A distant mountain, a large tree, a lighthouse or skyscraper make excellent targets. Point the optical tube s ...
... Observe during the daytime: Try out your telescope during the daytime at first. It is easier to learn how it operates and how to observe when it is light. Pick out an easy object to observe: A distant mountain, a large tree, a lighthouse or skyscraper make excellent targets. Point the optical tube s ...
CHaracterising ExOPlanets Satellite arXiv:1310.7800v1 [astro
... ver the course of the last 20 years, there has been ...
... ver the course of the last 20 years, there has been ...
Sample syllabus 2 - Johns Hopkins Center for Talented Youth
... Course Description: When the sun runs out of fuel, will it explode in a giant supernova or fade out into a white dwarf? Does every galaxy revolve around a super-massive black hole? Will the universe continue to expand, or will it eventually collapse back upon itself in a reversal of the Big Bang? As ...
... Course Description: When the sun runs out of fuel, will it explode in a giant supernova or fade out into a white dwarf? Does every galaxy revolve around a super-massive black hole? Will the universe continue to expand, or will it eventually collapse back upon itself in a reversal of the Big Bang? As ...
20. Meteorites and the chemical evolution of the Milky Way
... G dwarfs. G dwarfs are actually massive enough that some of them have begun to evolve away from the main sequence, which requires that a correction be applied to the metallicity distribution. Note, however, that stars with lower masses, such as K or M dwarfs, show the same discrepancy between the ob ...
... G dwarfs. G dwarfs are actually massive enough that some of them have begun to evolve away from the main sequence, which requires that a correction be applied to the metallicity distribution. Note, however, that stars with lower masses, such as K or M dwarfs, show the same discrepancy between the ob ...
Astronomers` Observing Guides
... Double and Multiple Stars Defined We begin this volume on viewing double and multiple stars by defining just what they are: two or more suns placed in close proximity to each other in the sky as seen with the unaided eye, binoculars or telescopes. With the exception of stars that just happen to lie al ...
... Double and Multiple Stars Defined We begin this volume on viewing double and multiple stars by defining just what they are: two or more suns placed in close proximity to each other in the sky as seen with the unaided eye, binoculars or telescopes. With the exception of stars that just happen to lie al ...
Article PDF - IOPscience
... indicators, the white dwarf population sampled must be as close as possible to being statistically complete. The white dwarf population is composed mainly of lowluminosity stars that are rather difficult to study as we move further away from the Sun. Candidates are mainly discovered from either prop ...
... indicators, the white dwarf population sampled must be as close as possible to being statistically complete. The white dwarf population is composed mainly of lowluminosity stars that are rather difficult to study as we move further away from the Sun. Candidates are mainly discovered from either prop ...
The Celestial Origin of Atoms
... as applied to our own Sun, and by extrapolation, to all stars. (The discrepancy is roughly a factor of two, and this can very likely be put down to problems in our understanding of neutrinos, rather than some defect in stellar physics.) More precisely, it corroborates our ideas about hydrogen fusion ...
... as applied to our own Sun, and by extrapolation, to all stars. (The discrepancy is roughly a factor of two, and this can very likely be put down to problems in our understanding of neutrinos, rather than some defect in stellar physics.) More precisely, it corroborates our ideas about hydrogen fusion ...
Full Program with Abstracts - CIERA
... planets and planetary systems orbiting main sequence stars. Exoplanet discoveries spill into the thousands, and the sensitivity boundaries continue to expand. NASA's Kepler Mission unveiled a galaxy replete with small planets and revealed populations that don't exist in our own solar system. The mis ...
... planets and planetary systems orbiting main sequence stars. Exoplanet discoveries spill into the thousands, and the sensitivity boundaries continue to expand. NASA's Kepler Mission unveiled a galaxy replete with small planets and revealed populations that don't exist in our own solar system. The mis ...
VIPNET NEWS T The Annular Solar Eclipse January 15, 2010
... its orbit, the Moon appears larger than the Sun. If an eclipse occurs at that time, it will be a total eclipse. However, if an eclipse occurs while the Moon is on the far side of its orbit, the Moon appears smaller than the Sun and can’t completely cover it. Looking down from space, we would see tha ...
... its orbit, the Moon appears larger than the Sun. If an eclipse occurs at that time, it will be a total eclipse. However, if an eclipse occurs while the Moon is on the far side of its orbit, the Moon appears smaller than the Sun and can’t completely cover it. Looking down from space, we would see tha ...
lecture course
... low brightnesses at their centres and absolute B magnitudes fainter than about -18. The faintest galaxies known are dwarf ellipticals. Elliptical galaxies are featureless, with brightness profiles that are high in the centre and lower far away from the centre. Spiral galaxies like the Milky Way and ...
... low brightnesses at their centres and absolute B magnitudes fainter than about -18. The faintest galaxies known are dwarf ellipticals. Elliptical galaxies are featureless, with brightness profiles that are high in the centre and lower far away from the centre. Spiral galaxies like the Milky Way and ...
INSTRUCTION MANUAL
... technology. Simple and friendly to use, the NexStar is up and running after locating just three bright objects. It’s the perfect combination of power and portability. If you are new to astronomy, you may wish to start off by using the NexStar's built-in Sky Tour feature, which commands the NexStar t ...
... technology. Simple and friendly to use, the NexStar is up and running after locating just three bright objects. It’s the perfect combination of power and portability. If you are new to astronomy, you may wish to start off by using the NexStar's built-in Sky Tour feature, which commands the NexStar t ...
On the nature of sn stars. I. A detailed abundance study
... There are several fundamental questions about the group of sn stars. Previous works suggest a high frequency of CP stars among sn stars (see e.g. Table 7 in Abt 1979), which is also supported by their low projected rotational velocity (Mermilliod 1983). One of the aims of this work is to study the p ...
... There are several fundamental questions about the group of sn stars. Previous works suggest a high frequency of CP stars among sn stars (see e.g. Table 7 in Abt 1979), which is also supported by their low projected rotational velocity (Mermilliod 1983). One of the aims of this work is to study the p ...
2004 SA Orlov
... The size of the torsion diameter is quite obvious and is equal to the diameter of the corresponding cosmic (solar) system. The latter is determined by the most distant orbits of the satellites of this torsion. At the same time, the vortex-like ether rotations occur in the cosmic space as some discoi ...
... The size of the torsion diameter is quite obvious and is equal to the diameter of the corresponding cosmic (solar) system. The latter is determined by the most distant orbits of the satellites of this torsion. At the same time, the vortex-like ether rotations occur in the cosmic space as some discoi ...
Aquarius (constellation)
Aquarius is a constellation of the zodiac, situated between Capricornus and Pisces. Its name is Latin for ""water-carrier"" or ""cup-carrier"", and its symbol is 20px (Unicode ♒), a representation of water.Aquarius is one of the oldest of the recognized constellations along the zodiac (the sun's apparent path). It was one of the 48 constellations listed by the 2nd century AD astronomer Ptolemy, and it remains one of the 88 modern constellations. It is found in a region often called the Sea due to its profusion of constellations with watery associations such as Cetus the whale, Pisces the fish, and Eridanus the river.