Discovery of a candidate inner Oort cloud planetoid
... inclinations. Continued perturbations can move the perihelion back into the planetary region where the object becomes a new visible comet with a semimajor axis still ∼ 104 AU. The major inconsistency between this picture of the formation of the Oort cloud and the orbit of our newly discovered object ...
... inclinations. Continued perturbations can move the perihelion back into the planetary region where the object becomes a new visible comet with a semimajor axis still ∼ 104 AU. The major inconsistency between this picture of the formation of the Oort cloud and the orbit of our newly discovered object ...
doc - IRAM
... 2. What are the responsibilities of the different groups? 3. What is the procedure for testing the arrays and choosing one for the run? 4. Are we going to have regular telecons? IRAM Demonstration run: end of August. If we are not ready then we will jump by 1 month - i.e. end of September. 3 year ti ...
... 2. What are the responsibilities of the different groups? 3. What is the procedure for testing the arrays and choosing one for the run? 4. Are we going to have regular telecons? IRAM Demonstration run: end of August. If we are not ready then we will jump by 1 month - i.e. end of September. 3 year ti ...
The Hobby-Eberly Telescope: performance
... The Hobby-Eberly Telescope (HET) is a fixed-elevation, 9.2-m telescope with a spherical primary mirror and a tracker at prime focus to follow astronomical objects. The telescope was constructed for $13.9M over the period 1994-1997. A series of extensive engineering upgrades and corrective actions ha ...
... The Hobby-Eberly Telescope (HET) is a fixed-elevation, 9.2-m telescope with a spherical primary mirror and a tracker at prime focus to follow astronomical objects. The telescope was constructed for $13.9M over the period 1994-1997. A series of extensive engineering upgrades and corrective actions ha ...
Ages of Star Clusters - Indiana University Astronomy
... sequence sooner. In a cluster in which all the stars formed at the same time, the stars “peel off” the main sequence from the top, leaving only progressively less and less massive stars remaining on the main sequence as time goes by. The main sequence turnoff is the point on the main sequence for wh ...
... sequence sooner. In a cluster in which all the stars formed at the same time, the stars “peel off” the main sequence from the top, leaving only progressively less and less massive stars remaining on the main sequence as time goes by. The main sequence turnoff is the point on the main sequence for wh ...
The World-Wide Telescope
... The SkyServer provides Internet access to the public Sloan Digital Sky Survey (SDSS) data for both astronomers and for science education. This paper describes the SkyServer goals and architecture. It also describes our experience operating the SkyServer on the Internet. The SDSS data is public and w ...
... The SkyServer provides Internet access to the public Sloan Digital Sky Survey (SDSS) data for both astronomers and for science education. This paper describes the SkyServer goals and architecture. It also describes our experience operating the SkyServer on the Internet. The SDSS data is public and w ...
ABOUT PARALLAX AND… CONSTELLATIONS Abstract
... EAAE Summer School Working Group (1France, 2Italy) ...
... EAAE Summer School Working Group (1France, 2Italy) ...
Dark Matter -24-------------------------------~-----------R-E-S-O-N-A-N-C
... distribution of matter that emits no light, i.e. dark matter. This seemed so farfetched at that time that astronomers began looking more carefully at their assumptions and arguments, to see if they could make this strange species of matter as little visible in their equations as it was in the sky. ...
... distribution of matter that emits no light, i.e. dark matter. This seemed so farfetched at that time that astronomers began looking more carefully at their assumptions and arguments, to see if they could make this strange species of matter as little visible in their equations as it was in the sky. ...
Lyman-α observations of astrospheres
... varying X-ray fluxs that were measured at different times, there is no accepted explanation for this power-law relation. We therefore propose an alternative way of characterizing these data that suggests a physical scenario that could explain these results. We start by separating the data into three ...
... varying X-ray fluxs that were measured at different times, there is no accepted explanation for this power-law relation. We therefore propose an alternative way of characterizing these data that suggests a physical scenario that could explain these results. We start by separating the data into three ...
FOTO Imaging - Cincinnati Observatory
... there all day to take care of any hunger pains that hit while you browse the displays. An Italian dinner catered by Bella Luna will be served from 6:00 until 7:30. After dinner, keynote speaker James Albury will take the stage. James, along with our very own Dean Regas, is co-host of the television ...
... there all day to take care of any hunger pains that hit while you browse the displays. An Italian dinner catered by Bella Luna will be served from 6:00 until 7:30. After dinner, keynote speaker James Albury will take the stage. James, along with our very own Dean Regas, is co-host of the television ...
day04
... • Edmond Halley predicted a comet would return in 1758 and every 76 years after that. (seen in 1910, 1986, and will return in 2061) Halley’s comet has an elliptical orbit extending out past Neptune. • William Herschel discovered Uranus in 1781 by accident. • After 50 years it was seen to deviate fro ...
... • Edmond Halley predicted a comet would return in 1758 and every 76 years after that. (seen in 1910, 1986, and will return in 2061) Halley’s comet has an elliptical orbit extending out past Neptune. • William Herschel discovered Uranus in 1781 by accident. • After 50 years it was seen to deviate fro ...
black holes activity
... -Chromosphere- not visible unless a ___________________ is occurring, sight of solar storms -which layer is hotter, why? Corona - spectral lines are dramatically different due to ____________________, temperatures dramatically increases above the chromosphere in the transition zone for reasons that ...
... -Chromosphere- not visible unless a ___________________ is occurring, sight of solar storms -which layer is hotter, why? Corona - spectral lines are dramatically different due to ____________________, temperatures dramatically increases above the chromosphere in the transition zone for reasons that ...
Quasars - Ann Arbor Earth Science
... Active Galaxies bridge the energy gap between ordinary galaxies and quasars ...
... Active Galaxies bridge the energy gap between ordinary galaxies and quasars ...
March 2010 - Pomona Valley Amateur Astronomers
... first to be recognized (in 1845) as having a spiral shape. But the greatest concentration of galaxies for amateur telescopes lies between the constellation of Coma Berenices (Berenice's Hair) with its hairy open star cluster (Melotte 111) and Virgo. The odd idea of Berenice's Hair comes from a story ...
... first to be recognized (in 1845) as having a spiral shape. But the greatest concentration of galaxies for amateur telescopes lies between the constellation of Coma Berenices (Berenice's Hair) with its hairy open star cluster (Melotte 111) and Virgo. The odd idea of Berenice's Hair comes from a story ...
Radio Telescopes
... to their wavelengths. This arrangement of electromagnetic radiation is called the electromagnetic spectrum. Forms of electromagnetic radiation also differ in their frequencies. Frequency is the number of times a wave vibrates per unit of time. The shorter the wavelength is, the more vibrations will ...
... to their wavelengths. This arrangement of electromagnetic radiation is called the electromagnetic spectrum. Forms of electromagnetic radiation also differ in their frequencies. Frequency is the number of times a wave vibrates per unit of time. The shorter the wavelength is, the more vibrations will ...
SMMP_BISANA - Infinity and Beyond
... The brightness of a star depends on both its size and its temperature. How bright a star looks from Earth depends on both its distance and how bright the star actually is. The brightness of a star can be described in 2 different ways: apparent brightness and absolute brightness. A star’s apparent br ...
... The brightness of a star depends on both its size and its temperature. How bright a star looks from Earth depends on both its distance and how bright the star actually is. The brightness of a star can be described in 2 different ways: apparent brightness and absolute brightness. A star’s apparent br ...
In-the-Spectacle-Lens Telescopic Device for Low Vision
... images of objects at farther distances. Typically, bioptic telescopes are mounted toward the top of spectacle lenses or above the frame with the telescope eyepiece positioned above the eye's pupil. This allows the wearer to alternate between the magnified narrow field of view available through the e ...
... images of objects at farther distances. Typically, bioptic telescopes are mounted toward the top of spectacle lenses or above the frame with the telescope eyepiece positioned above the eye's pupil. This allows the wearer to alternate between the magnified narrow field of view available through the e ...
Stellar Distances and Magnitudes
... • Suppose a star has mv = 7.0 and is located 100 pc away. • It is 10 times the standard distance. • Thus, it would be 100 times brighter to us at the standard distance. ...
... • Suppose a star has mv = 7.0 and is located 100 pc away. • It is 10 times the standard distance. • Thus, it would be 100 times brighter to us at the standard distance. ...
The Cosmic Perspective Telescopes Portals of Discovery
... • How does Earth's atmosphere affect groundbased observations? – Telescope sites are chosen to minimize the problems of light pollution, atmospheric turbulence, and bad weather. • Why do we put telescopes into space? – Forms of light other than radio and visible do not pass through Earth's atmos ...
... • How does Earth's atmosphere affect groundbased observations? – Telescope sites are chosen to minimize the problems of light pollution, atmospheric turbulence, and bad weather. • Why do we put telescopes into space? – Forms of light other than radio and visible do not pass through Earth's atmos ...
Galaxies - WordPress.com
... It provides us with many of the images we have of space. It is an especially useful telescope because it does not have to view things through our ...
... It provides us with many of the images we have of space. It is an especially useful telescope because it does not have to view things through our ...
Stellar Luminosities
... produced in a star and radiated into space in the form of E-M radiation. How do we determine the luminosity of the Sun? 1) Measure the Sun’s apparent brightness 2) Measure the Sun’s distance 3) Use the inverse square law ...
... produced in a star and radiated into space in the form of E-M radiation. How do we determine the luminosity of the Sun? 1) Measure the Sun’s apparent brightness 2) Measure the Sun’s distance 3) Use the inverse square law ...
The universe and our planet
... A galaxy is a large group of stars: between 100 000 and 500 million. Towards the centre of the galaxy, the stars are close together, but in the outer areas of the galaxy they are farther apart. Stars are made up mainly of hydrogen and helium, the two most abundant gases in the universe. Many stars h ...
... A galaxy is a large group of stars: between 100 000 and 500 million. Towards the centre of the galaxy, the stars are close together, but in the outer areas of the galaxy they are farther apart. Stars are made up mainly of hydrogen and helium, the two most abundant gases in the universe. Many stars h ...
11 04 11 Mylar Mirror in Ireland
... Mylar-type films make an attractive reflecting surface. Overall, however, we found that the complexity, tolerances, and total cost of suitable pneumatic mirror cells are far larger than that for a traditional mirror cells. Further, new technologies outlined on the Alt-Az Initiative site and books fo ...
... Mylar-type films make an attractive reflecting surface. Overall, however, we found that the complexity, tolerances, and total cost of suitable pneumatic mirror cells are far larger than that for a traditional mirror cells. Further, new technologies outlined on the Alt-Az Initiative site and books fo ...
Baltic Astronomy, vol. 21, 301–308, 2012 OBSERVATORY
... to focus on two key themes: interconnectability and overview and drilldown. With overview and drilldown, we will provide a means for the user to gain a quick understanding of what kinds of data are available as well as how to focus in on the data of interest quickly. The user should be able to not o ...
... to focus on two key themes: interconnectability and overview and drilldown. With overview and drilldown, we will provide a means for the user to gain a quick understanding of what kinds of data are available as well as how to focus in on the data of interest quickly. The user should be able to not o ...
X-ray output should be time variable
... Bright stars in the spectral range earlier than about B3 are soft X-ray sources, with LX ~ 10-7 LBol THEORY •O star X-ray emission comes from shock-heated gas present in their stellar winds; for B stars, the situation is more uncertain, and their Xrays may be related to magnetic fields, at least in ...
... Bright stars in the spectral range earlier than about B3 are soft X-ray sources, with LX ~ 10-7 LBol THEORY •O star X-ray emission comes from shock-heated gas present in their stellar winds; for B stars, the situation is more uncertain, and their Xrays may be related to magnetic fields, at least in ...
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.