OBJXlab-JCU_Alt
... many fields of science, discovery implies finding something that is hidden out of sight, such as digging up a fossil hidden under layers of clay, discovering the chemical structure of an enzyme, or traveling to the heart of the rainforest to photograph a previously unknown species of songbird. But h ...
... many fields of science, discovery implies finding something that is hidden out of sight, such as digging up a fossil hidden under layers of clay, discovering the chemical structure of an enzyme, or traveling to the heart of the rainforest to photograph a previously unknown species of songbird. But h ...
Summary: Modes of Star Formation
... The clustering of young stars on scales ranging from binaries to large associations provides another record of the way in which stars form. Like stellar masses, the properties of binaries are largely preserved from their time of formation, and this allows binary statistics to be used to infer someth ...
... The clustering of young stars on scales ranging from binaries to large associations provides another record of the way in which stars form. Like stellar masses, the properties of binaries are largely preserved from their time of formation, and this allows binary statistics to be used to infer someth ...
Astronomy Report Southern Cross Authors Maria Constanza Pavez
... very simple to explain. In Antiquity people used fantastic stories that helped to explain the origin of all the surrounding phenomena, and in so doing many civilizations mentioned the Southern Cross in their myths and legends. Many of them explain us about the ancient location of the constellation. ...
... very simple to explain. In Antiquity people used fantastic stories that helped to explain the origin of all the surrounding phenomena, and in so doing many civilizations mentioned the Southern Cross in their myths and legends. Many of them explain us about the ancient location of the constellation. ...
Astronomy
... C) Main sequence (only) D) White dwarf (only) E) Main sequence and double shell burning 21. What event is responsible for the ultimate death of the Sun? A) All the hydrogen runs out B) All the helium runs out C) The outer layers of the Sun are blown away by strong winds D) The Sun burns all the way ...
... C) Main sequence (only) D) White dwarf (only) E) Main sequence and double shell burning 21. What event is responsible for the ultimate death of the Sun? A) All the hydrogen runs out B) All the helium runs out C) The outer layers of the Sun are blown away by strong winds D) The Sun burns all the way ...
Document
... A) Because the star is more luminous and the burning produces less energy per fusion B) Because the star is less luminous and the burning produces less energy per fusion C) Because the star is more luminous and the burning produces more energy per fusion D) Because the star is less luminous and the ...
... A) Because the star is more luminous and the burning produces less energy per fusion B) Because the star is less luminous and the burning produces less energy per fusion C) Because the star is more luminous and the burning produces more energy per fusion D) Because the star is less luminous and the ...
The Milky Way
... The angular momentum of the Milky Way. The gravitational attraction of the stars near the Galactic center. The gravitational attraction of the supermassive black hole in the Galactic center. The gravitational attraction of the stars in the halo of the Milky Way. The gravitational attraction of all m ...
... The angular momentum of the Milky Way. The gravitational attraction of the stars near the Galactic center. The gravitational attraction of the supermassive black hole in the Galactic center. The gravitational attraction of the stars in the halo of the Milky Way. The gravitational attraction of all m ...
Cepheus (constellation)
... between 3.5m and 4.4m over a period of 5 days and 9 hours. The Cepheids are a class of pulsating variable stars; Delta Cephei has a minimum size of 40 solar diameters and a maximum size of 46 solar diameters. It is also a double star; the yellow star also has a wide-set blue-hued companion of magnit ...
... between 3.5m and 4.4m over a period of 5 days and 9 hours. The Cepheids are a class of pulsating variable stars; Delta Cephei has a minimum size of 40 solar diameters and a maximum size of 46 solar diameters. It is also a double star; the yellow star also has a wide-set blue-hued companion of magnit ...
01 - University of Warwick
... Here is an image of the satellite from the night of 30 June made out of ice-covered rock, and surrounded by tiny satel2005. 2003 EL 61 is the bright object in the center and the lites? satellite appears directly below about 0.5 arcseconds. To the Good question. We have constructed a hypothesis which ...
... Here is an image of the satellite from the night of 30 June made out of ice-covered rock, and surrounded by tiny satel2005. 2003 EL 61 is the bright object in the center and the lites? satellite appears directly below about 0.5 arcseconds. To the Good question. We have constructed a hypothesis which ...
Ecosystems, from life, to the Earth, to the Galaxy
... continental drift at work. The spiral arms are a 'compression wave', where the gas density is increased. They are almost stationary with respect to the rotation of the stars and gas around the galactic centre. Gas thus flows into the spiral arms, is compressed and a portion emerges as new stars (the ...
... continental drift at work. The spiral arms are a 'compression wave', where the gas density is increased. They are almost stationary with respect to the rotation of the stars and gas around the galactic centre. Gas thus flows into the spiral arms, is compressed and a portion emerges as new stars (the ...
The Night Sky
... Explain that our Sun looks bigger than other stars because it is much closer to us. 2. Activity: Investigate star colors. Ask students if they know what stars are made of. They are balls of hot glowing gases. Stars range in color from red to bluish white. To the naked eye, stars don’t look like they ...
... Explain that our Sun looks bigger than other stars because it is much closer to us. 2. Activity: Investigate star colors. Ask students if they know what stars are made of. They are balls of hot glowing gases. Stars range in color from red to bluish white. To the naked eye, stars don’t look like they ...
Black Holes & Quasars—18 Nov • Black hole • Quasar Ast 207 F2009
... – Attend only if stars are visible. See angel after 5:00pm, if weather is ambiguous. Rain predicted. – Quiz. You will be asked to locate a star using the Abrams Planetarium star chart. Quiz counts as one extra-credit clicker assignment. – Go to the south end of the building (toward Wilson Rd.) & tak ...
... – Attend only if stars are visible. See angel after 5:00pm, if weather is ambiguous. Rain predicted. – Quiz. You will be asked to locate a star using the Abrams Planetarium star chart. Quiz counts as one extra-credit clicker assignment. – Go to the south end of the building (toward Wilson Rd.) & tak ...
![Cosmic variance in [O/Fe] in the Galactic disk](http://s1.studyres.com/store/data/014331057_1-996ec6eddf93071c5e835624d4620c7e-300x300.png)
Cosmic variance in [O/Fe] in the Galactic disk
... elements is several times larger and in all cases clearly higher than the measurement uncertainties. For the α-elements Mg, Si, S, and Ti, Nissen found a tight correlation between their abundance ratio to iron and stellar age, inferred from the comparison with models of stellar structure and evoluti ...
... elements is several times larger and in all cases clearly higher than the measurement uncertainties. For the α-elements Mg, Si, S, and Ti, Nissen found a tight correlation between their abundance ratio to iron and stellar age, inferred from the comparison with models of stellar structure and evoluti ...
Deducing Temperatures and Luminosities of Stars
... “Tools”, not “Problems” • If we can determine that 2 stars are identical, then their relative brightness translates to relative distances • Example: Sun vs. Cen – spectra are very similar temperatures, radii almost identical (T follows from Planck function, radius R can be deduced by other means ...
... “Tools”, not “Problems” • If we can determine that 2 stars are identical, then their relative brightness translates to relative distances • Example: Sun vs. Cen – spectra are very similar temperatures, radii almost identical (T follows from Planck function, radius R can be deduced by other means ...
Temperate Earth-sized planets transiting a nearby ultracool dwarf star
... Star-like objects with effective temperatures of less than 2,700 kelvin are referred to as ‘ultracool dwarfs’1. This heterogeneous group includes stars of extremely low mass as well as brown dwarfs (substellar objects not massive enough to sustain hydrogen fusion), and represents about 15 per cent o ...
... Star-like objects with effective temperatures of less than 2,700 kelvin are referred to as ‘ultracool dwarfs’1. This heterogeneous group includes stars of extremely low mass as well as brown dwarfs (substellar objects not massive enough to sustain hydrogen fusion), and represents about 15 per cent o ...
Life Cycle of a Star
... • Internal temperature hot enough to start fusion at center said to be a main sequence star • Sun is an example • Each protostar will turn into one main sequence star • 90% of stars are main sequence stars • Vary in surface temperature and absolute magnitude ...
... • Internal temperature hot enough to start fusion at center said to be a main sequence star • Sun is an example • Each protostar will turn into one main sequence star • 90% of stars are main sequence stars • Vary in surface temperature and absolute magnitude ...
MAGNITUDE AND COLOR SYSTEMS
... regardless of the wavelength observed. The zero points are defined to coincide with the zero point of the widely used “visual” or standard “broad-band” V magnitude system: i.e. ...
... regardless of the wavelength observed. The zero points are defined to coincide with the zero point of the widely used “visual” or standard “broad-band” V magnitude system: i.e. ...
PAVYZDYS
... ratio is the most robust diagnostic of deep mixing, because it is insensitive to the adopted stellar parameters. In this work for the first time we determined 12C/13C isotope ratios in a sample of 34 Galactic clump stars as well as abundances of nitrogen, carbon and oxygen. Comparisons to evolutiona ...
... ratio is the most robust diagnostic of deep mixing, because it is insensitive to the adopted stellar parameters. In this work for the first time we determined 12C/13C isotope ratios in a sample of 34 Galactic clump stars as well as abundances of nitrogen, carbon and oxygen. Comparisons to evolutiona ...
Hipparcos
Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993. It was the first space experiment devoted to precision astrometry, the accurate measurement of the positions of celestial objects on the sky. This permitted the accurate determination of proper motions and parallaxes of stars, allowing a determination of their distance and tangential velocity. When combined with radial-velocity measurements from spectroscopy, this pinpointed all six quantities needed to determine the motion of stars. The resulting Hipparcos Catalogue, a high-precision catalogue of more than 118,200 stars, was published in 1997. The lower-precision Tycho Catalogue of more than a million stars was published at the same time, while the enhanced Tycho-2 Catalogue of 2.5 million stars was published in 2000. Hipparcos ' follow-up mission, Gaia, was launched in 2013.The word ""Hipparcos"" is an acronym for High precision parallax collecting satellite and also a reference to the ancient Greek astronomer Hipparchus of Nicaea, who is noted for applications of trigonometry to astronomy and his discovery of the precession of the equinoxes.