The Hobby-Eberly Telescope completion project
... HET was an ambitious project from its inception, aspiring to build a very large telescope comparatively inexpensively by deliberately limiting some typical telescope capabilities, such as full steerability, to fund an increased primary mirror size. Perhaps not surprisingly for an innovative design o ...
... HET was an ambitious project from its inception, aspiring to build a very large telescope comparatively inexpensively by deliberately limiting some typical telescope capabilities, such as full steerability, to fund an increased primary mirror size. Perhaps not surprisingly for an innovative design o ...
Exploring The Universe
... • Quasars may be infant galaxies. • In 1960, a faint object was matched with a strong radio signal. This object was called a quasar. • quasar quasi-stellar radio sources; very luminous objects that produce energy at a high rate and that are thought to be the most distant objects in the universe • Ea ...
... • Quasars may be infant galaxies. • In 1960, a faint object was matched with a strong radio signal. This object was called a quasar. • quasar quasi-stellar radio sources; very luminous objects that produce energy at a high rate and that are thought to be the most distant objects in the universe • Ea ...
Chapter Exercise
... orbit but would not change its orbit. (1A) In the circular orbit (1A) At the point of transition, Chang’e 1 decelerates to transit from the elliptical orbit to the less elliptical one and finally to the circular one. In other words, the PE of Chang’e 1 remains unchanged at that point but the KE decr ...
... orbit but would not change its orbit. (1A) In the circular orbit (1A) At the point of transition, Chang’e 1 decelerates to transit from the elliptical orbit to the less elliptical one and finally to the circular one. In other words, the PE of Chang’e 1 remains unchanged at that point but the KE decr ...
AMSAT 1m Dish - Del Mar North
... A=327 E=42 for Az/El applications, or H=+32 D=-9 for HA/Dec (astronomy) uses, or B=W3VD to point at the W3VD beacon, or ...
... A=327 E=42 for Az/El applications, or H=+32 D=-9 for HA/Dec (astronomy) uses, or B=W3VD to point at the W3VD beacon, or ...
92 The Nearest Star: The Sun
... 150 million km away from Earth, but our next closest star is more than 40 million million km away or more than 250,000 times farther away. That the Sun is about 150 million km away means it’s far enough that it takes eight minutes for light to travel from the Sun’s surface to Earth. If you traveled ...
... 150 million km away from Earth, but our next closest star is more than 40 million million km away or more than 250,000 times farther away. That the Sun is about 150 million km away means it’s far enough that it takes eight minutes for light to travel from the Sun’s surface to Earth. If you traveled ...
The Milky Way and Its Neighbors
... Approximately 10% of known galaxies are elliptical Stars orbit the galaxy center in all different planes Circular orbital velocity measurements do not work very well Sometimes a preferred direction of very slow rotation Luminosity decreases quickly from center so measurements are always ma ...
... Approximately 10% of known galaxies are elliptical Stars orbit the galaxy center in all different planes Circular orbital velocity measurements do not work very well Sometimes a preferred direction of very slow rotation Luminosity decreases quickly from center so measurements are always ma ...
Weighing Earth, Sun, & Universe—20 Apr Weighing the Earth • Define a motion
... 3. A planet orbits a star at a radius of 1 AU. One orbit takes ½ of an earth year. The mass of the star is ___ the mass of the sun. ...
... 3. A planet orbits a star at a radius of 1 AU. One orbit takes ½ of an earth year. The mass of the star is ___ the mass of the sun. ...
A Realistic Interstellar Explorer - NASA`s Institute for Advanced
... • A 2011 launch to Jupiter with a launch energy C3 = 117.1 km2/s2, and two years later, a 15.4 km/s perihelion burn near the Sun sends the spacecraft at 20.2 AU/year. • Launching toward a star enables comparison with locally measured properties of the interstellar medium with integrated properties d ...
... • A 2011 launch to Jupiter with a launch energy C3 = 117.1 km2/s2, and two years later, a 15.4 km/s perihelion burn near the Sun sends the spacecraft at 20.2 AU/year. • Launching toward a star enables comparison with locally measured properties of the interstellar medium with integrated properties d ...
List of Illustrations
... Invention of the vacuum tube – ‘Cathode rays’ and ‘canal rays’ – William Crookes: the Crookes tube and the corpuscular interpretation of cathode rays – Cathode rays are shown to move far slower than light – The discovery of the electron – Wilhelm Röntgen & the discovery of X-rays – Radioactivity; Be ...
... Invention of the vacuum tube – ‘Cathode rays’ and ‘canal rays’ – William Crookes: the Crookes tube and the corpuscular interpretation of cathode rays – Cathode rays are shown to move far slower than light – The discovery of the electron – Wilhelm Röntgen & the discovery of X-rays – Radioactivity; Be ...
Planetplanet scattering alone cannot explain the freefloating planet
... the estimated height of the radio emission zone will be little less than 1.6 au. These estimates indeed assume that the basic emission process remains unchanged for all orbital phases. It is only the wind density changes for different orbital phases offering different optical depth to the emitted ra ...
... the estimated height of the radio emission zone will be little less than 1.6 au. These estimates indeed assume that the basic emission process remains unchanged for all orbital phases. It is only the wind density changes for different orbital phases offering different optical depth to the emitted ra ...
Magnitude of Stars - What`s Out Tonight?
... noticeable object in the sky. It is also the closest celestial body to the Earth and the only natural object to orbit our planet. The Moon circles the Earth counterclockwise about every 29 days, close to a month’s time. This rate and direction of movement makes the Moon rise in the east about 50 min ...
... noticeable object in the sky. It is also the closest celestial body to the Earth and the only natural object to orbit our planet. The Moon circles the Earth counterclockwise about every 29 days, close to a month’s time. This rate and direction of movement makes the Moon rise in the east about 50 min ...
Paper
... The technical literature contains many designs for large telescopes with spherical primary mirrors. An excellent review of the literature can be found in reference three. Each design corrects the image over some practical field, but the design approaches vary widely and not all would be applicable t ...
... The technical literature contains many designs for large telescopes with spherical primary mirrors. An excellent review of the literature can be found in reference three. Each design corrects the image over some practical field, but the design approaches vary widely and not all would be applicable t ...
Finding the Most Distant Quasars Using Bayesian Selection Methods
... been almost completely ionised, as the first generations of stars—and quasars—emitted sufficient ultraviolet radiation to separate electrons from protons. The rest-frame wavelength of the break is at 0.1216 µm, but the wavelength of all light is increased by the cosmological expansion; the Universe ...
... been almost completely ionised, as the first generations of stars—and quasars—emitted sufficient ultraviolet radiation to separate electrons from protons. The rest-frame wavelength of the break is at 0.1216 µm, but the wavelength of all light is increased by the cosmological expansion; the Universe ...
Light: The Cosmic Messenger - Department of Physics & Astronomy
... affect ground-based observations? • The best ground-based sites for astronomical observing are: ...
... affect ground-based observations? • The best ground-based sites for astronomical observing are: ...
The first cool rocky/icy exoplanet
... sand and pebbles clump together, planet formation is further supported by the presence of icy snowballs in a cooler zone outside the so-called “ice boundary”. Planets forming there are likely to grow to gas giants by accreting hydrogen and helium, and to migrate inwards, with a fair fraction ending ...
... sand and pebbles clump together, planet formation is further supported by the presence of icy snowballs in a cooler zone outside the so-called “ice boundary”. Planets forming there are likely to grow to gas giants by accreting hydrogen and helium, and to migrate inwards, with a fair fraction ending ...
Small Wonders: Andromeda
... to resolve the individual stars throughout M31.Although these astronomers studied M31 with the most powerful telescopes of the time, it's visible to the naked eye under all but the worst conditions of light pollution, Andromeda - the 31st entry in Messiers catalog, spans around 5 degrees under the m ...
... to resolve the individual stars throughout M31.Although these astronomers studied M31 with the most powerful telescopes of the time, it's visible to the naked eye under all but the worst conditions of light pollution, Andromeda - the 31st entry in Messiers catalog, spans around 5 degrees under the m ...
October, 2014 - Mahoning Valley Astronomical Society
... comet will complete more than 1/2 rotation during the descent; P67’s rotation rate is 12.4 hours. Philae has 12 different instruments on board. One is called CONSERT which will bounce low-frequency waves through its center, creating the first-ever image of a comet nucleus. Another instrument is APXS ...
... comet will complete more than 1/2 rotation during the descent; P67’s rotation rate is 12.4 hours. Philae has 12 different instruments on board. One is called CONSERT which will bounce low-frequency waves through its center, creating the first-ever image of a comet nucleus. Another instrument is APXS ...
Photoelectric Photometry of the Pleiades
... 8. Take a Star Reading and Record the Results 1. Click on the Change View button to activate the Finder mode. Click on Set Coordinates to enter a RA and Dec from the Data Table on Page 14. Move the telescope using the directional buttons to center a star in the red square. 2. Click on the Change Vie ...
... 8. Take a Star Reading and Record the Results 1. Click on the Change View button to activate the Finder mode. Click on Set Coordinates to enter a RA and Dec from the Data Table on Page 14. Move the telescope using the directional buttons to center a star in the red square. 2. Click on the Change Vie ...
plagiarism - things to know - Science Department
... by So-n-so, where the author points out that than red light, and so hot stars look blue the star Betelgeuse in the constellation or bluish-white. Cool stars at 3,000 Orion is very red because its temperature is degrees give off more red light than blue, so cool, and Rigel, another star in Orion, is ...
... by So-n-so, where the author points out that than red light, and so hot stars look blue the star Betelgeuse in the constellation or bluish-white. Cool stars at 3,000 Orion is very red because its temperature is degrees give off more red light than blue, so cool, and Rigel, another star in Orion, is ...
PAVYZDYS
... processes that require modeling beyond the first dredge-up of standard models. The 12C/13C 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 ...
... processes that require modeling beyond the first dredge-up of standard models. The 12C/13C 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 ...
slides - Department of Physics and Astronomy
... It is often said that stars twinkle but planets won’t. Do you agree? On hot summer days often you see the view closer to the surface of a paved road blurry and wavy. Why? Twinkling is not desirable for astronomical observations since it blurs astronomical images. What could astronomers do to overcom ...
... It is often said that stars twinkle but planets won’t. Do you agree? On hot summer days often you see the view closer to the surface of a paved road blurry and wavy. Why? Twinkling is not desirable for astronomical observations since it blurs astronomical images. What could astronomers do to overcom ...
Stars: some basic characteristics
... lines is that they are very hot. There is so much thermal energy in their atmospheres that most of the elements become ionized; if the electrons aren’t attached to nuclei, then they can’t transition between energy levels and so they can’t ...
... lines is that they are very hot. There is so much thermal energy in their atmospheres that most of the elements become ionized; if the electrons aren’t attached to nuclei, then they can’t transition between energy levels and so they can’t ...
Spectroscopy History
... unexplained phenomenon. By the late 1850’s, the University of Heidelberg had become one of the great centers of scientific research in the world. Two of its brightest scientists were a physicist named Gustav Kirchoff and a chemist named Robert Bunsen. In 1859, they repeated Foucault’s experiment of ...
... unexplained phenomenon. By the late 1850’s, the University of Heidelberg had become one of the great centers of scientific research in the world. Two of its brightest scientists were a physicist named Gustav Kirchoff and a chemist named Robert Bunsen. In 1859, they repeated Foucault’s experiment of ...
The Southern Winter PDF
... exposed and, with a temperature of over 220,000 degrees C, it is violently hot, with most of the radiation being emitted in the extreme ultraviolet part of the spectrum. This causes the expanding outer layers of the star to glow in their characteristic colors. The image reveals a complex history of ...
... exposed and, with a temperature of over 220,000 degrees C, it is violently hot, with most of the radiation being emitted in the extreme ultraviolet part of the spectrum. This causes the expanding outer layers of the star to glow in their characteristic colors. The image reveals a complex history of ...
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.