The Primordial Abundance of $^ 6$ Li and $^ 9$ be
... production of 6 Li and 7 Li (in roughly equally proportions) by cosmic rays. Thus, the observations are consistent with SBBN, provided that HD 84937 is a subgiant. The parallax of HD 84937 is 0.0277′′ ± 0.0065′′ (van Altena, Lee & Hoffleit 1994). If HD 84937 is a sub-giant, then the models predict a ...
... production of 6 Li and 7 Li (in roughly equally proportions) by cosmic rays. Thus, the observations are consistent with SBBN, provided that HD 84937 is a subgiant. The parallax of HD 84937 is 0.0277′′ ± 0.0065′′ (van Altena, Lee & Hoffleit 1994). If HD 84937 is a sub-giant, then the models predict a ...
The Ages of Astrophotography - Powered by Catchers of the Light
... The alterations of colour take place more speedily in proportion as the light is more intense. In the direct beams of the sun, two or three minutes are sufficient to produce the full effect. In the shade, several hours are required, and light transmitted through different coloured glasses acts upon ...
... The alterations of colour take place more speedily in proportion as the light is more intense. In the direct beams of the sun, two or three minutes are sufficient to produce the full effect. In the shade, several hours are required, and light transmitted through different coloured glasses acts upon ...
Burge Proc SPIE 4840 226 - LOFT, Large Optics Fabrication and
... Size and asphericity are the factors that challenge our ability to make larger and faster mirrors for giant telescopes. Size drives the requirement for greater efficiency in manufacturing the optics. While no one is proposing to make individual segments larger than the 8 m class mirrors for which fa ...
... Size and asphericity are the factors that challenge our ability to make larger and faster mirrors for giant telescopes. Size drives the requirement for greater efficiency in manufacturing the optics. While no one is proposing to make individual segments larger than the 8 m class mirrors for which fa ...
Transcript - Chandra X
... This presentation is an overview of the content and resources for the National Science Olympiad (NSO) Division B 2017 Reach for the Stars Event (RFTS). The NSO 2017 national competition will be held at Wright State University in Dayton, OH on May 19th and 20th. Slide 2: My name is Donna Young, and I ...
... This presentation is an overview of the content and resources for the National Science Olympiad (NSO) Division B 2017 Reach for the Stars Event (RFTS). The NSO 2017 national competition will be held at Wright State University in Dayton, OH on May 19th and 20th. Slide 2: My name is Donna Young, and I ...
PowerPoint
... Application of Kepler’s Laws By using the deepest images of stars toward the Galactic Center, they have been able to detected a full orbit of a star with a period of 15.2 years and Semimajor axis of 950 AU. That means that the black hole is about 2.6 million solar masses!!! Sept 10, 2003 ...
... Application of Kepler’s Laws By using the deepest images of stars toward the Galactic Center, they have been able to detected a full orbit of a star with a period of 15.2 years and Semimajor axis of 950 AU. That means that the black hole is about 2.6 million solar masses!!! Sept 10, 2003 ...
When we look at a neighboring galaxy (such as M31, the
... supergiants from foreground stars—and that is through measuring the radial velocities of the stars. M31 is barreling towards us at -300 km/sec (about -670,000 miles/hr), where the minus sign serves as a reminder that the velocity is towards us. (Truth be told: most of this apparent motion is actuall ...
... supergiants from foreground stars—and that is through measuring the radial velocities of the stars. M31 is barreling towards us at -300 km/sec (about -670,000 miles/hr), where the minus sign serves as a reminder that the velocity is towards us. (Truth be told: most of this apparent motion is actuall ...
20 pm - Starmap
... The map shows what you see looking at the zenith. The apparent inversion of East and West compared to road maps is normal. Hold the map face down above your head, and the cardinal points will be oriented as usual. As a starting point, face North, holding the map in your eyesight direction, with its ...
... The map shows what you see looking at the zenith. The apparent inversion of East and West compared to road maps is normal. Hold the map face down above your head, and the cardinal points will be oriented as usual. As a starting point, face North, holding the map in your eyesight direction, with its ...
Stories in the Stars
... of stars or galaxies. Star clusters are open or globular. Constellation. A pattern of stars that suggests the shape of some god, person, animal or object. Eclipse. Blocking of light from one body by another that passes in front of it. Eclipsing binary star. Binary star whose orbit around each other ...
... of stars or galaxies. Star clusters are open or globular. Constellation. A pattern of stars that suggests the shape of some god, person, animal or object. Eclipse. Blocking of light from one body by another that passes in front of it. Eclipsing binary star. Binary star whose orbit around each other ...
How To Buy Your First Telescope
... have a mix of refractor and reflector elements in their design. German astronomer Bernhard Schmidt made the first compound telescope in 1930. The Schmidt telescope had a spherical primary mirror at the back of the telescope and a glass corrector plate in the front. The Schmidt telescope was the prec ...
... have a mix of refractor and reflector elements in their design. German astronomer Bernhard Schmidt made the first compound telescope in 1930. The Schmidt telescope had a spherical primary mirror at the back of the telescope and a glass corrector plate in the front. The Schmidt telescope was the prec ...
Stars - gilbertmath.com
... It is in this way that all of the ________________ of the ________________ __________ have been formed. As the elements are sent out into space, some of the debris and elements from the old star create new ______________ out of which new star and planet systems may form. ...
... It is in this way that all of the ________________ of the ________________ __________ have been formed. As the elements are sent out into space, some of the debris and elements from the old star create new ______________ out of which new star and planet systems may form. ...
NAS biographical memoir of Martin Schwarzschild
... Nature and nurture conspired to provide an ideal scientific environment for Martin Schwarzschild, but the early years must have been difficult. He was born to a distinguished and assimilated German-Jewish family in 1912—two years before the outbreak of World War I—when his father, Karl Schwarzschild ...
... Nature and nurture conspired to provide an ideal scientific environment for Martin Schwarzschild, but the early years must have been difficult. He was born to a distinguished and assimilated German-Jewish family in 1912—two years before the outbreak of World War I—when his father, Karl Schwarzschild ...
Space Exploration
... the observers to note the precise moment of observation. Armillery Sphere was used to locate celestial objects As measuring devices became more and more precise, old notions about the universe began to crumble. For example, Brahe's measurements--even though they were made with the naked eye--were fi ...
... the observers to note the precise moment of observation. Armillery Sphere was used to locate celestial objects As measuring devices became more and more precise, old notions about the universe began to crumble. For example, Brahe's measurements--even though they were made with the naked eye--were fi ...
Spring 2012 - Union College
... earlier each night. After a month, a star will rise 2 hours earlier. So our perspective of the Universe changes throughout the year. We must take these motions into account when timing observations. We need also to define a system that describes the way a particular observer sees the sky at any part ...
... earlier each night. After a month, a star will rise 2 hours earlier. So our perspective of the Universe changes throughout the year. We must take these motions into account when timing observations. We need also to define a system that describes the way a particular observer sees the sky at any part ...
Determination of kinetic energies of stars using Hipparcos data *
... larger proper motions than the stars of early spectral types. There is a good deal of different hypotheses that aim to explain this phenomenon. One of them asserts that the late type stars have smaller masses, which is why their velocities are larger. The theoretical base for this statement can be f ...
... larger proper motions than the stars of early spectral types. There is a good deal of different hypotheses that aim to explain this phenomenon. One of them asserts that the late type stars have smaller masses, which is why their velocities are larger. The theoretical base for this statement can be f ...
Data reduction strategies for lucky imaging
... function, with a Moffat halo. This radially symmetric sum of a convolved Airy function and a Moffat function results from the points of peak intensity adding coherently to form the Airy core, while secondary peaks (or “speckles,” as they are often referred to) add incoherently resulting in the unif ...
... function, with a Moffat halo. This radially symmetric sum of a convolved Airy function and a Moffat function results from the points of peak intensity adding coherently to form the Airy core, while secondary peaks (or “speckles,” as they are often referred to) add incoherently resulting in the unif ...
ISS Sighting Opportunities
... risen to in the northeast. How accurately can you time this event? · New Moon (exact at 7:09 a.m. EDT). Wednesday, Sept. 28 · In bright twilight just 15 minutes after sunset, a telescope may show Saturn less than 2° above much-brighter Venus extremely low in the west. A very thin crescent Moon is se ...
... risen to in the northeast. How accurately can you time this event? · New Moon (exact at 7:09 a.m. EDT). Wednesday, Sept. 28 · In bright twilight just 15 minutes after sunset, a telescope may show Saturn less than 2° above much-brighter Venus extremely low in the west. A very thin crescent Moon is se ...
December 2011
... the balance is correct we need to fit an Eyepiece into the Focuser Assembly. Loosen the small thumb screw on the side of the focuser tube. If fitted remove the dust cap from the focuser and fit the Eyepiece. Tighten the thumb screw to secure the Eyepiece. Make sure the telescope is not pointing towa ...
... the balance is correct we need to fit an Eyepiece into the Focuser Assembly. Loosen the small thumb screw on the side of the focuser tube. If fitted remove the dust cap from the focuser and fit the Eyepiece. Tighten the thumb screw to secure the Eyepiece. Make sure the telescope is not pointing towa ...
Towards the Intensity Interferometry Stellar Imaging System
... telescopes A and B being close together receive beats almost at the same time. This corresponds to a high degree of correlation. Telescopes A and C being further apart do not receive beats in phase and the degree of correlation is then lower [21]. primary design requirements are well matched by Imag ...
... telescopes A and B being close together receive beats almost at the same time. This corresponds to a high degree of correlation. Telescopes A and C being further apart do not receive beats in phase and the degree of correlation is then lower [21]. primary design requirements are well matched by Imag ...
The Surveyors` Heliotrope
... a circular opening. The mirror had two motions so that it could be put in any position. Its center was coincident with the axis of the disks, in all positions. The mirror could be turned so as to throw a beam of light symmetrically through the forward disk, in which position the reflected rays would ...
... a circular opening. The mirror had two motions so that it could be put in any position. Its center was coincident with the axis of the disks, in all positions. The mirror could be turned so as to throw a beam of light symmetrically through the forward disk, in which position the reflected rays would ...
General Astronomy - Stockton University
... Earth. Another way to state the distance between Earth and Sun is, therefore, to say it is 8.5 lightminutes. Note the 'time machine' effect. We don't see the Sun as it is "now". We see it as it was 8.5 minutes ago. ...
... Earth. Another way to state the distance between Earth and Sun is, therefore, to say it is 8.5 lightminutes. Note the 'time machine' effect. We don't see the Sun as it is "now". We see it as it was 8.5 minutes ago. ...
THE NUCLEUS OF COMET 48P/JOHNSON
... of the twilight sky. Absolute photometric calibration was secured from repeated observations of standard stars near in the sky to the comet and interleaved in time with the comet observations (Landolt 1992). Subsequent measurements of the standard stars proved consistent roughly at the 0.01 mag lev ...
... of the twilight sky. Absolute photometric calibration was secured from repeated observations of standard stars near in the sky to the comet and interleaved in time with the comet observations (Landolt 1992). Subsequent measurements of the standard stars proved consistent roughly at the 0.01 mag lev ...
Chapter-by-Chapter Guide
... Most of the atoms in our bodies (all the elements except for hydrogen, since our bodies generally do not contain helium) were made by stars well after the Big Bang. So most of what makes up our bodies was once part of stars. Light travels at 300,000 kilometers per second. A light-year is the distanc ...
... Most of the atoms in our bodies (all the elements except for hydrogen, since our bodies generally do not contain helium) were made by stars well after the Big Bang. So most of what makes up our bodies was once part of stars. Light travels at 300,000 kilometers per second. A light-year is the distanc ...
3D maps of the local interstellar medium: searching for the imprints
... towards 23,000 nearby stars is used to illustrate the potential of the more detailed maps that are expected within the next several years. The map reveals the location of the main IS cloud complexes up to distances on the order of 600 to 1200 pc depending on directions. Owing to target selection bia ...
... towards 23,000 nearby stars is used to illustrate the potential of the more detailed maps that are expected within the next several years. The map reveals the location of the main IS cloud complexes up to distances on the order of 600 to 1200 pc depending on directions. Owing to target selection bia ...
Light and Telescopes Astronomy 1 — Elementary Astronomy LA Mission College Spring F2015
... Astronomers use large telescopes primarily because large telescopes ...
... Astronomers use large telescopes primarily because large telescopes ...
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.