Altair - the hottest `cool` star in X-rays
... 2.4 MK and its emission measure distribution (EMD) is dominated by rather cool plasma at temperatures in the range of 1 – 4 MK, additionally a weak hotter component seems to contribute at a few percent level. These properties are quite typical for weakly active stars and similar to those of the quie ...
... 2.4 MK and its emission measure distribution (EMD) is dominated by rather cool plasma at temperatures in the range of 1 – 4 MK, additionally a weak hotter component seems to contribute at a few percent level. These properties are quite typical for weakly active stars and similar to those of the quie ...
Galileo Galilei and Aristotle
... Galileo and Aristotle were both discoverers. Both made important, but not necessarily correct discoveries, and we all know that. To find out, comparing and contrasting the lives of both discoverers and their works are necessary. ...
... Galileo and Aristotle were both discoverers. Both made important, but not necessarily correct discoveries, and we all know that. To find out, comparing and contrasting the lives of both discoverers and their works are necessary. ...
October 2012 - astronomy for beginners
... will reduce your night vision and look towards the south. Almost overhead is Deneb the brightest star in the constellation of Cygnus (the Swan). Look towards the west (right) about the width of your two clenched fists when held up at arm’s length. You will see another bright star this is Vega the br ...
... will reduce your night vision and look towards the south. Almost overhead is Deneb the brightest star in the constellation of Cygnus (the Swan). Look towards the west (right) about the width of your two clenched fists when held up at arm’s length. You will see another bright star this is Vega the br ...
Good Vibrations and Stellar Pulsations - Physics
... to the Small Magellanic Cloud was 33,000 light years. This was the greatest distance ever determined for an astronomical object. In 1917, Harlow Shapley used Hertzsprung’s calibration of the period-luminosity relation to determine the distance to the globular clusters (some of which contain Cepheids ...
... to the Small Magellanic Cloud was 33,000 light years. This was the greatest distance ever determined for an astronomical object. In 1917, Harlow Shapley used Hertzsprung’s calibration of the period-luminosity relation to determine the distance to the globular clusters (some of which contain Cepheids ...
Chapter 4 Galactic Chemical Evolution
... This material is rich in C, N and O. In contrast, type Ia supernovae are probably caused by explosive fusion reactions in binary systems and eject enriched material & 108 yr after the initial star formation. This material is rich in iron. The main sequence lifetime TMS of a star is a very strong fun ...
... This material is rich in C, N and O. In contrast, type Ia supernovae are probably caused by explosive fusion reactions in binary systems and eject enriched material & 108 yr after the initial star formation. This material is rich in iron. The main sequence lifetime TMS of a star is a very strong fun ...
Where planets are formed: Protoplanetary disk evolution and planet
... present in our Solar System supernova enrichment of Solar Nebula distance from supernova < 0.3 pc N>1000 • The Solar System survived the supernova explosion distance from the supernova > 0.1 pc Solar System properties require the Sun formed in the outer region of an intermediate massive clus ...
... present in our Solar System supernova enrichment of Solar Nebula distance from supernova < 0.3 pc N>1000 • The Solar System survived the supernova explosion distance from the supernova > 0.1 pc Solar System properties require the Sun formed in the outer region of an intermediate massive clus ...
A-level Physics (Specification A) Teacher guide Teacher guide
... In the first chapter, students see how some of the optics topics they have studied earlier in the specification are applied to the design of telescopes. The relative merits of the two basic methods – reflecting and refracting – are discussed as well as the influence the design of the telescopes has ...
... In the first chapter, students see how some of the optics topics they have studied earlier in the specification are applied to the design of telescopes. The relative merits of the two basic methods – reflecting and refracting – are discussed as well as the influence the design of the telescopes has ...
Galaxy Hunters Article, Cosmology Information, First Star Facts
... On that night, slightly giddy from the high altitude, Steidel played for the first time at Keck the dreamy, lullaby-like music of the alternative rock band Mazzy Star. It would soon become a coda for each night Steidel observed at Keck and a special bond between him and Dickinson, whom he had met wh ...
... On that night, slightly giddy from the high altitude, Steidel played for the first time at Keck the dreamy, lullaby-like music of the alternative rock band Mazzy Star. It would soon become a coda for each night Steidel observed at Keck and a special bond between him and Dickinson, whom he had met wh ...
Document
... - Estimated 1M years old - Most stars clouded from view by dust - Only 4-5 stars visible with small scope ...
... - Estimated 1M years old - Most stars clouded from view by dust - Only 4-5 stars visible with small scope ...
University of Dayton Flyer Observatory (UFO)
... A Ritchey-Chrétien is a specialized Cassegrain reflector utilizing true hyperbolic surfaces. All reflectors typically have an aberration called coma - all except for the Ritchey-Chrétien. The hyperbolic mirrors of the Ritchey-Chrétien make this design coma free, which results in a much smaller spot ...
... A Ritchey-Chrétien is a specialized Cassegrain reflector utilizing true hyperbolic surfaces. All reflectors typically have an aberration called coma - all except for the Ritchey-Chrétien. The hyperbolic mirrors of the Ritchey-Chrétien make this design coma free, which results in a much smaller spot ...
MS PowerPoint - National Schools` Observatory
... (3) Also, this takes less than a day, not the months required for Mira variables. Anyway, that is the end of the workshop. Well done on getting this far National Schools’ Observatory ...
... (3) Also, this takes less than a day, not the months required for Mira variables. Anyway, that is the end of the workshop. Well done on getting this far National Schools’ Observatory ...
Age Distributions of Low Mass Stars in the Rho Ophiucus Molecular
... The Rho Ophiuchi (Rho Oph) cloud complex is a cluster of star-forming molecular clouds in the constellation Ophiuchus. The coordinates are right ascension of 16h 28m 06s and declination of –24d 32.5s [1]. This makes it accessible from both hemispheres. It consists of two main regions of dense gas an ...
... The Rho Ophiuchi (Rho Oph) cloud complex is a cluster of star-forming molecular clouds in the constellation Ophiuchus. The coordinates are right ascension of 16h 28m 06s and declination of –24d 32.5s [1]. This makes it accessible from both hemispheres. It consists of two main regions of dense gas an ...
ASTR-1020: Astronomy II Course Lecture Notes - Faculty
... 6. Besides white dwarfs in a close binary system, the primary also can be a neutron star or black hole (see next section). Indeed, X-ray binary systems are suspected to contain one of these two objects =⇒ the X-rays are emitted from the extremely hot (perhaps a high as a billion Kelvins!) inner port ...
... 6. Besides white dwarfs in a close binary system, the primary also can be a neutron star or black hole (see next section). Indeed, X-ray binary systems are suspected to contain one of these two objects =⇒ the X-rays are emitted from the extremely hot (perhaps a high as a billion Kelvins!) inner port ...
Chapter 11
... a. About 40 weeks. b. About 30,000 years. c. About 30 million years. d. About 1 billion years. e. About 5 billion years. ...
... a. About 40 weeks. b. About 30,000 years. c. About 30 million years. d. About 1 billion years. e. About 5 billion years. ...
... he Earth has been either very hot or very cold during most of its history. Of course, this is true as far as the human beings are concerned. Some fifty million years ago, there was no ice on the poles. Eighteen thousand years ago, there was ice nearly three kilometres thick in parts of Europe. As a ...
Foundations of Harappan Astronomy:
... 1) the evaporation in the southern hemisphere while it is winter in the north (around January in the present Epoch) 2) The movement of the moisture to the equatorial latitudes at Summer solstice (around March in the present epoch) 3) The amount of heating of the Indian subcontinental plate in early ...
... 1) the evaporation in the southern hemisphere while it is winter in the north (around January in the present Epoch) 2) The movement of the moisture to the equatorial latitudes at Summer solstice (around March in the present epoch) 3) The amount of heating of the Indian subcontinental plate in early ...
Lect18-4-19-10
... In Einstein’s view, the large mass has distorted the space around it, so that freely falling particles, particles on which no forces additional to gravity are acting, follow paths that are curved by the distortion of the space they are moving through. For Einstein, if we can calculate the curvature ...
... In Einstein’s view, the large mass has distorted the space around it, so that freely falling particles, particles on which no forces additional to gravity are acting, follow paths that are curved by the distortion of the space they are moving through. For Einstein, if we can calculate the curvature ...
Mapping the Milky Way: William Herschel`s Star-‐Gages
... Herschel described his star gage method in 1784.3 In 1785 he published his results:4 star-‐gages of 683 regions in the sky, forming a circle running through the galactic poles and crossing the plan ...
... Herschel described his star gage method in 1784.3 In 1785 he published his results:4 star-‐gages of 683 regions in the sky, forming a circle running through the galactic poles and crossing the plan ...
1 VERSION 21A Cosmos+ A big bang family performance about the
... and we can predict where they will be many million years from now. - No that is not true since the universe is chaotic therefore the mechanism of the solar system must also be unstable. TOM7 I soon plan to travel on the space station ISS around the Earth. I could also choose a satellite like XMM, CH ...
... and we can predict where they will be many million years from now. - No that is not true since the universe is chaotic therefore the mechanism of the solar system must also be unstable. TOM7 I soon plan to travel on the space station ISS around the Earth. I could also choose a satellite like XMM, CH ...
The Milky Way - Houston Community College System
... Some neutron stars have magnetic fields ~ 100 times stronger even than normal neutron stars. These care called Magnetars. ...
... Some neutron stars have magnetic fields ~ 100 times stronger even than normal neutron stars. These care called Magnetars. ...
Meteors and Comets
... Meteors and Comets During Columbus’ first voyage to the Indies he reported seeing “...a marvelous bolt of fire fall from the heavens into the sea...” This phenomenon was actually a meteor. Learn about meteors. Read the paragraph below and then answer the questions below it. Meteors are sometimes ...
... Meteors and Comets During Columbus’ first voyage to the Indies he reported seeing “...a marvelous bolt of fire fall from the heavens into the sea...” This phenomenon was actually a meteor. Learn about meteors. Read the paragraph below and then answer the questions below it. Meteors are sometimes ...
International Ultraviolet Explorer
The International Ultraviolet Explorer (IUE) was an astronomical observatory satellite primarily designed to take ultraviolet spectra. The satellite was a collaborative project between NASA, the UK Science Research Council and the European Space Agency (ESA). The mission was first proposed in early 1964, by a group of scientists in the United Kingdom, and was launched on January 26, 1978 aboard a NASA Delta rocket. The mission lifetime was initially set for 3 years, but in the end it lasted almost 18 years, with the satellite being shut down in 1996. The switch-off occurred for financial reasons, while the telescope was still functioning at near original efficiency.It was the first space observatory to be operated in real time by astronomers who visited the groundstations in the United States and Europe. Astronomers made over 104,000 observations using the IUE, of objects ranging from solar system bodies to distant quasars. Among the significant scientific results from IUE data were the first large scale studies of stellar winds, accurate measurements of the way interstellar dust absorbs light, and measurements of the supernova SN1987A which showed that it defied stellar evolution theories as they then stood. When the mission ended, it was considered the most successful astronomical satellite ever.