Stars: Stellar Evol & “death” Galaxies Astronomy 1 — Elementary Astronomy
... A Distant Cluster of Galaxies Image Credit: FORS1, 8.2-meter VLT, ESO ...
... A Distant Cluster of Galaxies Image Credit: FORS1, 8.2-meter VLT, ESO ...
Stellar astrophysics based on interferometry
... AMBER: Near-Infrared (J, H, K; 1-2.5 mm) 3-way beam combiner. Spectal resolution R=30 (low resolution), 1500 (medium r.), 12000 (high r.). VLTI instruments and their operation are designed along the same lines of VLT instruments, in particular for what concerns standards, operation, data management. ...
... AMBER: Near-Infrared (J, H, K; 1-2.5 mm) 3-way beam combiner. Spectal resolution R=30 (low resolution), 1500 (medium r.), 12000 (high r.). VLTI instruments and their operation are designed along the same lines of VLT instruments, in particular for what concerns standards, operation, data management. ...
Michell, Laplace and the Origin of the Black Hole Concept
... However, Laplace did not consider comets to be part of the Solar System as some travelled in highly eccentric orbits, and while they moved into the Sun’s domain they also moved far beyond the planetary sphere. ...
... However, Laplace did not consider comets to be part of the Solar System as some travelled in highly eccentric orbits, and while they moved into the Sun’s domain they also moved far beyond the planetary sphere. ...
Chemical composition of 90 F and G disk dwarfs
... however, been challenged and new questions have arisen. Particularly important is the detailed abundance analysis of 189 F and G dwarfs with −1.1 < [Fe/H] < 0.25 by Edvardsson et al. (1993a, hereafter EAGLNT). The main results from this work may be summarized as follows: (1) There are no tight relat ...
... however, been challenged and new questions have arisen. Particularly important is the detailed abundance analysis of 189 F and G dwarfs with −1.1 < [Fe/H] < 0.25 by Edvardsson et al. (1993a, hereafter EAGLNT). The main results from this work may be summarized as follows: (1) There are no tight relat ...
A Starscape in Red and Blue - Royal Astronomical Society of Canada
... 1 million to 10 million times fainter than their host stars. The first observations in November 2013 targeted previously known planetary systems—the four-planet HR8799 system (co-discovered by an LLNL-led team at the Gemini and Keck Observatory in 2008) and the Beta Pictoris system, among others. GP ...
... 1 million to 10 million times fainter than their host stars. The first observations in November 2013 targeted previously known planetary systems—the four-planet HR8799 system (co-discovered by an LLNL-led team at the Gemini and Keck Observatory in 2008) and the Beta Pictoris system, among others. GP ...
JRASC, June 2014 Issue (PDF, low resolution)
... 1 million to 10 million times fainter than their host stars. The first observations in November 2013 targeted previously known planetary systems—the four-planet HR8799 system (co-discovered by an LLNL-led team at the Gemini and Keck Observatory in 2008) and the Beta Pictoris system, among others. GP ...
... 1 million to 10 million times fainter than their host stars. The first observations in November 2013 targeted previously known planetary systems—the four-planet HR8799 system (co-discovered by an LLNL-led team at the Gemini and Keck Observatory in 2008) and the Beta Pictoris system, among others. GP ...
Galileo`s Observation of Neptune 1612-1613
... care to record “fixed stars” that drifted through the field of view during his observations as he tracked Jupiter’s movement across the sky. The discovery of objects orbiting a planet other than Earth created severe difficulties for one of the primary justifications of the geocentric model of the so ...
... care to record “fixed stars” that drifted through the field of view during his observations as he tracked Jupiter’s movement across the sky. The discovery of objects orbiting a planet other than Earth created severe difficulties for one of the primary justifications of the geocentric model of the so ...
Vocabulary Definitions
... elevation the vertical distance or height above sea level (IG) emission line the bands of color seen in a light spectrum; indicates that light is being emitted, or produced, at that wavelength (IG) emit to give off (SRB) equator the imaginary circle around Earth or a celestial object that is everyw ...
... elevation the vertical distance or height above sea level (IG) emission line the bands of color seen in a light spectrum; indicates that light is being emitted, or produced, at that wavelength (IG) emit to give off (SRB) equator the imaginary circle around Earth or a celestial object that is everyw ...
Archaeoastronomy at the Ames Plantation Mound Site Elizabeth A
... sky and to “calculate and delineate” the sun, moon, and stars (there is also a later story where these astronomers were later decapitated for failing to predict an eclipse). One reason that this legend is particularly interesting is that it not only speaks prominently of astronomers, but that it sho ...
... sky and to “calculate and delineate” the sun, moon, and stars (there is also a later story where these astronomers were later decapitated for failing to predict an eclipse). One reason that this legend is particularly interesting is that it not only speaks prominently of astronomers, but that it sho ...
148 Jun - British Astronomical Association
... system with the stars separated though still quite close. It appears that the orbit of the eclipsing stars is ellipitical as the secondary minimum does not occur at 0.5 of the system’s phase. RX Herculis is roughly midway between Rasalhague and Altair. AK Herculis Although this system is not on our ...
... system with the stars separated though still quite close. It appears that the orbit of the eclipsing stars is ellipitical as the secondary minimum does not occur at 0.5 of the system’s phase. RX Herculis is roughly midway between Rasalhague and Altair. AK Herculis Although this system is not on our ...
A New Science Strategy for Space Astronomy and Astrophysics
... next decade,1 prepared by a committee under the leadership of John Bahcall. Like previous decadal studies in this field, the report identified in priority order the most important scientific programs and projects for both groundand space-based research. It recommended a single large initiative for s ...
... next decade,1 prepared by a committee under the leadership of John Bahcall. Like previous decadal studies in this field, the report identified in priority order the most important scientific programs and projects for both groundand space-based research. It recommended a single large initiative for s ...
The Habitability of Planets Orbiting M
... orbiting other stars1 . Many of these planets are especially captivating because of their orbital distances, which place them in their stars’ canonical habitable zone—the region around a star where an orbiting planet with an Earth-like atmosphere (CO2 -H2 O-N2 ) could maintain water in liquid form o ...
... orbiting other stars1 . Many of these planets are especially captivating because of their orbital distances, which place them in their stars’ canonical habitable zone—the region around a star where an orbiting planet with an Earth-like atmosphere (CO2 -H2 O-N2 ) could maintain water in liquid form o ...
SpeX Observing Manual - NASA Infrared Telescope Facility
... AR coats (see Figure 2-1). (The AR coats were applied in 1999 when the potential problem was not recognized.) These features were also present at the same frequency in the original Aladdin 3 data but the smaller pixels and better sampling of the new H2RG makes the features appear star-like rather th ...
... AR coats (see Figure 2-1). (The AR coats were applied in 1999 when the potential problem was not recognized.) These features were also present at the same frequency in the original Aladdin 3 data but the smaller pixels and better sampling of the new H2RG makes the features appear star-like rather th ...
Evolution of low mass stars
... The HRD inspired an English astronomer, Sir Arthur Stanley Eddington (18821944), when Russell visited London and presented his diagram at a meeting of the Royal Astronomical Society in 1913 (Eisberg, 2002). At the time, Eddington was the chief assistant of the Royal Greenwich Observatory. In 1926 Ed ...
... The HRD inspired an English astronomer, Sir Arthur Stanley Eddington (18821944), when Russell visited London and presented his diagram at a meeting of the Royal Astronomical Society in 1913 (Eisberg, 2002). At the time, Eddington was the chief assistant of the Royal Greenwich Observatory. In 1926 Ed ...
Galileo`s miraculous year: 1609 and the revolutionary telescope
... collecting light through a 25 mm diameter lens and focussing it through the 6 mm diameter human iris should not be overlooked! The telescope allowed Galileo to see objects with a brightness of about 9th magnitude compared to the unaided eye’s limit of about 6th magnitude. For comparison, the moons ...
... collecting light through a 25 mm diameter lens and focussing it through the 6 mm diameter human iris should not be overlooked! The telescope allowed Galileo to see objects with a brightness of about 9th magnitude compared to the unaided eye’s limit of about 6th magnitude. For comparison, the moons ...
Gamma-Ray Bursts and Puzzles of Core
... observable stellar magnitudes (or with upper R limits) and spectroscopic red shifts against the background of results of the photometric measurement of z applied to galaxies from the Hubble Deep Field (HDF) by Fernández et al. (1999). Circles denote the GRB host galaxies with the BTA photometry, ast ...
... observable stellar magnitudes (or with upper R limits) and spectroscopic red shifts against the background of results of the photometric measurement of z applied to galaxies from the Hubble Deep Field (HDF) by Fernández et al. (1999). Circles denote the GRB host galaxies with the BTA photometry, ast ...
Chemical Evolution of Galactic Systems
... the Milky Way. These simulations help shed light on the nature of the gas accretion processes that fueled the formation of our Galaxy. We demonstrate the importance of low- and intermediate-mass stars in explaining the elemental and isotopic abundance patterns measured in Galactic stars. An intrigui ...
... the Milky Way. These simulations help shed light on the nature of the gas accretion processes that fueled the formation of our Galaxy. We demonstrate the importance of low- and intermediate-mass stars in explaining the elemental and isotopic abundance patterns measured in Galactic stars. An intrigui ...
Cosmos
... the fact that the Sun seems to be generating too few of the elusive particles called neutrinos. Some proposed explanations are listed. In Chapter 10 we wonder whether there is enough matter in the universe eventually to stop the recession of distant galaxies, and whether the universe is infinitely o ...
... the fact that the Sun seems to be generating too few of the elusive particles called neutrinos. Some proposed explanations are listed. In Chapter 10 we wonder whether there is enough matter in the universe eventually to stop the recession of distant galaxies, and whether the universe is infinitely o ...
Tycho Brahe
... Scholastic dogma of the invariability of the heavens. The terms nova and supernova, which respectively refer to a “new” star and an extremely bright star, are misleading. These stars are not new, they are ancient and as far as brightness is concern, this is only relative to other stars. Around this ...
... Scholastic dogma of the invariability of the heavens. The terms nova and supernova, which respectively refer to a “new” star and an extremely bright star, are misleading. These stars are not new, they are ancient and as far as brightness is concern, this is only relative to other stars. Around this ...
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.