bowser - Colorado Space Grant Consortium
... visible spectrum into approximately 50 nm ranges in the IR, red and orange spectrums. – Photodetectors will measure sky background brightness corresponding with the imaging system. ...
... visible spectrum into approximately 50 nm ranges in the IR, red and orange spectrums. – Photodetectors will measure sky background brightness corresponding with the imaging system. ...
The Star Zodiac of Antiquity
... cuneiform script deciphered. Prior to this, for one and a half millennia, the primal, star zodiac had been forgotten. It seems that only much later on, in the mid-second century BC, did the idea of dividing a circle into three hundred and sixty degrees first appear, in Greece.18 The Metonic cycle wa ...
... cuneiform script deciphered. Prior to this, for one and a half millennia, the primal, star zodiac had been forgotten. It seems that only much later on, in the mid-second century BC, did the idea of dividing a circle into three hundred and sixty degrees first appear, in Greece.18 The Metonic cycle wa ...
A Zoo of Galaxies - Cambridge University Press
... The variety of different galaxies observed in the sky naturally caused people to wonder what they were. The scientific arguments surrounding this question at the start of the 20th century, are best represented perhaps, by the public debate held in 1920 between Heber Curtis and Harlow Shapley. Many oth ...
... The variety of different galaxies observed in the sky naturally caused people to wonder what they were. The scientific arguments surrounding this question at the start of the 20th century, are best represented perhaps, by the public debate held in 1920 between Heber Curtis and Harlow Shapley. Many oth ...
Science with IMACS on Magellan
... gradients in the halos of nearby brighter galaxies such as those of the Sculptor group. They are particularly interested in using the tip of the red giant branch as a distance indicator to nearby galaxies with a wide range of metal abundances, as a check of possible dependences of Cepheid-based dist ...
... gradients in the halos of nearby brighter galaxies such as those of the Sculptor group. They are particularly interested in using the tip of the red giant branch as a distance indicator to nearby galaxies with a wide range of metal abundances, as a check of possible dependences of Cepheid-based dist ...
Star Formation in the Rosette Complex
... The pioneering observations by Gosachinskii & Khersonskii (1982) of the HI emission at 21 cm made with the RATAN-600 telescope revealed that the Rosette Complex and the Monoceros Loop were enclosed in a thin HI envelope 130 pc in diameter, possibly expanding at 20 km·s−1 , suggesting that the supern ...
... The pioneering observations by Gosachinskii & Khersonskii (1982) of the HI emission at 21 cm made with the RATAN-600 telescope revealed that the Rosette Complex and the Monoceros Loop were enclosed in a thin HI envelope 130 pc in diameter, possibly expanding at 20 km·s−1 , suggesting that the supern ...
Statistical properties of a sample of periodically variable B-type supergiants ⋆
... He I 4471 line. Besides these, we observed one silicon line for each star with the goal to obtain an accurate temperature estimate. Depending on spectral type, this is either the Si II 4130 doublet (late B-type) or the Si III 4560 triplet (early B-type). The spectra were reduced in the standard way, ...
... He I 4471 line. Besides these, we observed one silicon line for each star with the goal to obtain an accurate temperature estimate. Depending on spectral type, this is either the Si II 4130 doublet (late B-type) or the Si III 4560 triplet (early B-type). The spectra were reduced in the standard way, ...
Computation of a comet`s orbit - Iowa Research Online
... or non-appearance of cumulative errors in the course of time will show how close these approximations are. The reasons for this state of affairs are var ious and to give even a passable explanation of them, ana of the theories by which the many changes of position are taken into account, would requ ...
... or non-appearance of cumulative errors in the course of time will show how close these approximations are. The reasons for this state of affairs are var ious and to give even a passable explanation of them, ana of the theories by which the many changes of position are taken into account, would requ ...
Chapter 1 - Princeton University Press
... power proportional to its area. (Put a bucket out in the rain; if it has twice the diameter, its opening area will be four times as large and will collect four times as much rain.) The Yerkes telescope had 27 × 27, or 729, times the light-gathering power of Galileo’s telescope. Since brightness fall ...
... power proportional to its area. (Put a bucket out in the rain; if it has twice the diameter, its opening area will be four times as large and will collect four times as much rain.) The Yerkes telescope had 27 × 27, or 729, times the light-gathering power of Galileo’s telescope. Since brightness fall ...
Properties of Galactic early-type O
... optically thick clumping. When it is pronounced, this macroclumping (or porosity) affects the emerging spectrum for a given mass-loss by reducing the effective opacity of the wind, because optically thick clumps hide material. Another factor that might affect the mass-loss rate is the structure of wind ...
... optically thick clumping. When it is pronounced, this macroclumping (or porosity) affects the emerging spectrum for a given mass-loss by reducing the effective opacity of the wind, because optically thick clumps hide material. Another factor that might affect the mass-loss rate is the structure of wind ...
Stars, Galaxies, and Beyond
... I have prepared this summary to assist in learning some of the materials relevant to the courses named. These 300–level (junior) college courses have provided a satisfying opportunity to take a more detailed but still manageable look at astronomy and astrophysics applying to space well beyond the so ...
... I have prepared this summary to assist in learning some of the materials relevant to the courses named. These 300–level (junior) college courses have provided a satisfying opportunity to take a more detailed but still manageable look at astronomy and astrophysics applying to space well beyond the so ...
Dynamical properties of a large young disk galaxy at z=2.03⋆
... HDF-S catalog). These observations were part of a larger project of SINFONI observations of mass and/or disk selected high redshift galaxies, which will be presented in two separate papers (van Starkenburg et al. 2008a, 2008b). Here, we will discuss our methods as used on our best case. We observed ...
... HDF-S catalog). These observations were part of a larger project of SINFONI observations of mass and/or disk selected high redshift galaxies, which will be presented in two separate papers (van Starkenburg et al. 2008a, 2008b). Here, we will discuss our methods as used on our best case. We observed ...
ASTRONOMICAL BINOCULARS
... depending upon your location. In general, the declination point of your zenith is equal to the latitude at which you are standing on Earth. EPHEMERIS - The ephemeris of a planet or the sun or the moon is a table giving the coordinates of the object at regular intervals of time. The coordinates will ...
... depending upon your location. In general, the declination point of your zenith is equal to the latitude at which you are standing on Earth. EPHEMERIS - The ephemeris of a planet or the sun or the moon is a table giving the coordinates of the object at regular intervals of time. The coordinates will ...
I. Constellations
... ____stars____ named after ____an animal____, ____a person____ or ___ an object ____. B. In modern astronomy, a constellation is defined as a specific ____area____ of the sky as determined by the International Astronomical Union (IAU). C. The celestial sphere is divided into __88___ contiguous region ...
... ____stars____ named after ____an animal____, ____a person____ or ___ an object ____. B. In modern astronomy, a constellation is defined as a specific ____area____ of the sky as determined by the International Astronomical Union (IAU). C. The celestial sphere is divided into __88___ contiguous region ...
The Evolution of Molecular Clouds
... few times 107 years (Blitz & Shu 1980; Larson 1981). The short lifetimes of molecular clouds are directly indicated by the fact that the range in age of the young stars associated with them is only about 10 to 20 Myr, comparable to the internal dynamical timescales of large molecular clouds (Larson ...
... few times 107 years (Blitz & Shu 1980; Larson 1981). The short lifetimes of molecular clouds are directly indicated by the fact that the range in age of the young stars associated with them is only about 10 to 20 Myr, comparable to the internal dynamical timescales of large molecular clouds (Larson ...
Emission from dust in galaxies: Metallicity dependence
... normalization of D half. Thus, we can find a rough dependence of f on D from Fig. 1b by doubling D (i.e., the line in Fig. 1b is moved to the left by 0.3 dex). Since D of SMC is about 5 10−4 (Issa et al. 1990), we find f ' 0.75 for the SMC extinction case, while f ' 0.85 if we adopt the extinction l ...
... normalization of D half. Thus, we can find a rough dependence of f on D from Fig. 1b by doubling D (i.e., the line in Fig. 1b is moved to the left by 0.3 dex). Since D of SMC is about 5 10−4 (Issa et al. 1990), we find f ' 0.75 for the SMC extinction case, while f ' 0.85 if we adopt the extinction l ...
Homework Due
... • Mass • Composition © 2007 Pearson Education Inc., publishing as Pearson Addison-Wesley ...
... • Mass • Composition © 2007 Pearson Education Inc., publishing as Pearson Addison-Wesley ...
A Spectroscopically Confirmed Excess of 24 micron Sources in a
... To trace how dust-obscured star formation varies with environment, we compare the fraction of 24µm sources in a super galaxy group to the field and a rich galaxy cluster at z ∼ 0.35. We draw on multi-wavelength observations9 that combine Hubble, Chandra, and Spitzer imaging with extensive optical sp ...
... To trace how dust-obscured star formation varies with environment, we compare the fraction of 24µm sources in a super galaxy group to the field and a rich galaxy cluster at z ∼ 0.35. We draw on multi-wavelength observations9 that combine Hubble, Chandra, and Spitzer imaging with extensive optical sp ...
2 Statistical properties of a sample of periodically variable B-type supergiants
... The HIPPARCOS data of the 40 targets (28 sample stars and 12 comparison stars) were subjected to detailed period search by means of the Scargle (1982) and Phase Dispersion Minimisation (Stellingwerf 1978) methods. In Fig. 2.1, we show the phase diagrams for the dominant frequency for two representat ...
... The HIPPARCOS data of the 40 targets (28 sample stars and 12 comparison stars) were subjected to detailed period search by means of the Scargle (1982) and Phase Dispersion Minimisation (Stellingwerf 1978) methods. In Fig. 2.1, we show the phase diagrams for the dominant frequency for two representat ...
3.1 Radio Astronomy Research Results For much of PY 2010, radio
... on the NGC7448 group and the first AGES determination of the HI mass function. Rhys Taylor completed his PhD on the AGES Virgo cluster data, and is taking up a post-doctoral position at Arecibo. An NSF REU student, Tim Taber, will present his work on UGC2082 at the winter AAS. An AGES objective is ...
... on the NGC7448 group and the first AGES determination of the HI mass function. Rhys Taylor completed his PhD on the AGES Virgo cluster data, and is taking up a post-doctoral position at Arecibo. An NSF REU student, Tim Taber, will present his work on UGC2082 at the winter AAS. An AGES objective is ...
Terrestrial Planets
... imprinting large number of additional lines of known wavelength into the spectrum • with the calibrating data suffering identical instrumental distortions as the data ...
... imprinting large number of additional lines of known wavelength into the spectrum • with the calibrating data suffering identical instrumental distortions as the data ...
THE HELIACAL RISE OF SIRIUS- Algorithm
... The atmospheric extinction for a given place shows how many star-magnitudes are extinguished by one earth atmosphere. In the best case, in a dry mountain desert, the extinction will be around 0.10. In the worse case, around some sea coasts, it may reach 0.40 and even 0.50. There are some scholars wh ...
... The atmospheric extinction for a given place shows how many star-magnitudes are extinguished by one earth atmosphere. In the best case, in a dry mountain desert, the extinction will be around 0.10. In the worse case, around some sea coasts, it may reach 0.40 and even 0.50. There are some scholars wh ...
Corvus (constellation)
Corvus is a small constellation in the Southern Celestial Hemisphere. Its name comes from the Latin word ""raven"" or ""crow"". It includes only 11 stars with brighter than 4.02 magnitudes. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations. The four brightest stars, Gamma, Delta, Epsilon, and Beta Corvi from a distinctive quadrilateral in the night sky. The young star Eta Corvi has been found to have two debris disks.