a MS Word version.
... 8. Measurements of the distribution of the sizes of the angular variations in the CMB (...by MAXIMA, BOOMERANG, WMAP projects) have pinned down some of the characteristics of our universe. Describe the three geometries the universe could have (and what it means about the density of the universe) and ...
... 8. Measurements of the distribution of the sizes of the angular variations in the CMB (...by MAXIMA, BOOMERANG, WMAP projects) have pinned down some of the characteristics of our universe. Describe the three geometries the universe could have (and what it means about the density of the universe) and ...
Lecture 12, PPT version
... Galaxy). All of the stars formed at roughly the same time. Globular clusters have lots of RED stars, but no BLUE stars (because they died long ago and were not “replenished”). ...
... Galaxy). All of the stars formed at roughly the same time. Globular clusters have lots of RED stars, but no BLUE stars (because they died long ago and were not “replenished”). ...
APOM 2014 April
... Sedna caused quite a stir after its discovery in 2003, because it resides in a kind of orbital "no man's land". Its perihelion (closest point to the Sun) is 76 a.u. — too far away to have been flung out there by a close pass with an outer planet. Dynamicists have speculated that a star passed very c ...
... Sedna caused quite a stir after its discovery in 2003, because it resides in a kind of orbital "no man's land". Its perihelion (closest point to the Sun) is 76 a.u. — too far away to have been flung out there by a close pass with an outer planet. Dynamicists have speculated that a star passed very c ...
Stars - Academic Computer Center
... • Those stars in the upper right of the figure are very luminous but also very cool. Therefore they must be very large. These are the Red Giant stars. • Those stars in the lower left are very hot but have low luminosity. They must be very small. These are Betelgeuse is almost as big as the orbit Whi ...
... • Those stars in the upper right of the figure are very luminous but also very cool. Therefore they must be very large. These are the Red Giant stars. • Those stars in the lower left are very hot but have low luminosity. They must be very small. These are Betelgeuse is almost as big as the orbit Whi ...
star-formation rate
... Galaxies do not become very red if τ is large because their star formation rate, and thus the fraction of massive blue stars, does not decrease sufficiently. ...
... Galaxies do not become very red if τ is large because their star formation rate, and thus the fraction of massive blue stars, does not decrease sufficiently. ...
AST101_lect_12
... • A: Temperatures from 8000-10,000K. They appear white. Strong absorption lines of hydrogen. Examples: Vega, Altair, Sirius. • F: slightly hotter than the Sun. Absorption lines of metals appear. Procyon is an F star. • G: temperatures between 5000 and 6000K. Appear yellow. Examples: Sun, α Centauri, ...
... • A: Temperatures from 8000-10,000K. They appear white. Strong absorption lines of hydrogen. Examples: Vega, Altair, Sirius. • F: slightly hotter than the Sun. Absorption lines of metals appear. Procyon is an F star. • G: temperatures between 5000 and 6000K. Appear yellow. Examples: Sun, α Centauri, ...
Basic properties of stars
... The Sun-centered model of the solar system laid out by Copernicus in De Revolutionibus (1543) made a very specific prediction: that the nearby stars should exhibit parallax shifts with respect to the distant background of stars. Tycho Brahe improved positional measures from +/- 10 arc minutes to as ...
... The Sun-centered model of the solar system laid out by Copernicus in De Revolutionibus (1543) made a very specific prediction: that the nearby stars should exhibit parallax shifts with respect to the distant background of stars. Tycho Brahe improved positional measures from +/- 10 arc minutes to as ...
Exoplanets - An ESO/OPTICON/IAU summer school on modern
... 3. What is an (exo)planet? "A planet is a celestial body that: (a) is in orbit around the Sun (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has cleared the neighbourhood around its orbit." IAU, R ...
... 3. What is an (exo)planet? "A planet is a celestial body that: (a) is in orbit around the Sun (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has cleared the neighbourhood around its orbit." IAU, R ...
Project Descriptions - UCI Physics and Astronomy
... motions of the four satellites of Saturn. Investigate their positions for the dates that you are schedule to observe at the UCI Observatory. See the observatory schedule on the web at http://wwww.physics.uci.edu/˜observat/cosmos schedule.html and assume you’ll be working from about 9 pm to midnight ...
... motions of the four satellites of Saturn. Investigate their positions for the dates that you are schedule to observe at the UCI Observatory. See the observatory schedule on the web at http://wwww.physics.uci.edu/˜observat/cosmos schedule.html and assume you’ll be working from about 9 pm to midnight ...
Ayres-Kepler-ASC
... clumps of flux built by local dynamo, independent of deep seated el jefe dynamo responsible for sunspots and their decadal cycling: lack of spots doesn’t mean lack of activity ...
... clumps of flux built by local dynamo, independent of deep seated el jefe dynamo responsible for sunspots and their decadal cycling: lack of spots doesn’t mean lack of activity ...
Schmidt-Cassegrain Optical Tube Assembly
... The Schmidt-Cassegrain focusing mechanism controls the primary mirror which is mounted on a ring that slides back and forth on the primary baffle tube. The focusing knob, which moves the primary mirror, is on the rear cell of the telescope just below the star diagonal and eyepiece. Turn the focusing ...
... The Schmidt-Cassegrain focusing mechanism controls the primary mirror which is mounted on a ring that slides back and forth on the primary baffle tube. The focusing knob, which moves the primary mirror, is on the rear cell of the telescope just below the star diagonal and eyepiece. Turn the focusing ...
Stars, Galaxies, and the Universe Section 1 Distances to Stars
... stars. The sun has a diameter of 1,390,000 km. • Most of the stars you can see in the night sky are medium-sized stars. • Many stars also have about the same mass as the sun, however some stars may be more or less massive. ...
... stars. The sun has a diameter of 1,390,000 km. • Most of the stars you can see in the night sky are medium-sized stars. • Many stars also have about the same mass as the sun, however some stars may be more or less massive. ...
Abstracts
... particular planetary spacecraft. These estimates can be used for a variety of scientific applications providing an enhancement of the mission's science return, with a minimal set of requirements on the on-board instrumentation. Among these applications are planetary atmospheric studies and planetary ...
... particular planetary spacecraft. These estimates can be used for a variety of scientific applications providing an enhancement of the mission's science return, with a minimal set of requirements on the on-board instrumentation. Among these applications are planetary atmospheric studies and planetary ...
Spectroscopy Lecture 10
... – Found Sirius B at Northwestern’s Dearborn Observatory Procyon B found in 1895 at Lick – Was it a star that had cooled and dimmed? Spectrum of 40 Eri B observed – an A star! – It must be hot – Must have small radius to be so faint – The first “w hite dwarf” Adams found Sirius B is also an A star ...
... – Found Sirius B at Northwestern’s Dearborn Observatory Procyon B found in 1895 at Lick – Was it a star that had cooled and dimmed? Spectrum of 40 Eri B observed – an A star! – It must be hot – Must have small radius to be so faint – The first “w hite dwarf” Adams found Sirius B is also an A star ...
View poster
... The solution is to start considering the Moon. Therefore the dynamic range of the star sensor had to include the brighter stars in our galaxy and the very bright Moon. Ranges from magnitudes 1 to -13 need to be covered. In the lab we have shown that the dynamic range of the star sensor can include t ...
... The solution is to start considering the Moon. Therefore the dynamic range of the star sensor had to include the brighter stars in our galaxy and the very bright Moon. Ranges from magnitudes 1 to -13 need to be covered. In the lab we have shown that the dynamic range of the star sensor can include t ...
Galaxies
... In 1912 V.M. Slipher looked at the spectrum of the Andromeda galaxy, M31. He did not know it was a galaxy but he found the lines in the spectrum were nearer to the red end of the spectrum than expected. This effect is called Red Shift and indicated that the object was moving away from the observer a ...
... In 1912 V.M. Slipher looked at the spectrum of the Andromeda galaxy, M31. He did not know it was a galaxy but he found the lines in the spectrum were nearer to the red end of the spectrum than expected. This effect is called Red Shift and indicated that the object was moving away from the observer a ...
Ancient Astronomy
... • Johannes Kepler inherited Brahe’s data and determined three empirical laws governing the motion of orbiting celestial objects. – 1st Law: Each planet moves around the Sun in an orbit that is an ellipse, with the Sun at one focus of the ellipse. – 2nd Law: The straight line joining a planet and the ...
... • Johannes Kepler inherited Brahe’s data and determined three empirical laws governing the motion of orbiting celestial objects. – 1st Law: Each planet moves around the Sun in an orbit that is an ellipse, with the Sun at one focus of the ellipse. – 2nd Law: The straight line joining a planet and the ...
How Cosmic Clocks Tick - Max-Planck
... About one in every ten stars has a companion, but not all such systems are suitable. Most binary systems comprise a pulsar and a white dwarf, a burnt-out star that has shrunk to the size of the Earth. Since a white dwarf isn’t nearly as compact as a neutron star, it also doesn’t cause a very strong ...
... About one in every ten stars has a companion, but not all such systems are suitable. Most binary systems comprise a pulsar and a white dwarf, a burnt-out star that has shrunk to the size of the Earth. Since a white dwarf isn’t nearly as compact as a neutron star, it also doesn’t cause a very strong ...
Other Solar Systems Around Other Stars
... Doppler method tells you the MASS of the planet and DISTANCE from star Only transits can give you the size, density of exoplanets Direct imaging – very tough; only a handful Absorption lines from bright star transits may tell us atmospheric chemistry Infrared light variations during orbit can tell u ...
... Doppler method tells you the MASS of the planet and DISTANCE from star Only transits can give you the size, density of exoplanets Direct imaging – very tough; only a handful Absorption lines from bright star transits may tell us atmospheric chemistry Infrared light variations during orbit can tell u ...
Weighing a Galaxy—11 Nov Ast 207 F2005 Nov-09 • Schedule
... planet’s orbit. Kepler’s 3rd Law: M = R3 / T2 for R in AU, T in years, and M in solar masses. ...
... planet’s orbit. Kepler’s 3rd Law: M = R3 / T2 for R in AU, T in years, and M in solar masses. ...
Which Constellation is Which?
... long handle. Orion is named after a great hunter. You can see his belt, marked by three bright stars. Constellations are imaginary pictures in the sky. The stars look like they are all the same distance away. That’s not true. The stars in the sky are different distances from Earth. ...
... long handle. Orion is named after a great hunter. You can see his belt, marked by three bright stars. Constellations are imaginary pictures in the sky. The stars look like they are all the same distance away. That’s not true. The stars in the sky are different distances from Earth. ...
Lecture #5 Copernicus, Kepler, Galileo, and Newton 11 June 2012
... Its lack of parallax indicated it must be much farther away than the moon. At the time, it was thought that changes only occurred in the sublunar regions; the idea that there could be a change among the fixed stars was revolutionary. His observations of the Great Comet of 1577 showed that it was far ...
... Its lack of parallax indicated it must be much farther away than the moon. At the time, it was thought that changes only occurred in the sublunar regions; the idea that there could be a change among the fixed stars was revolutionary. His observations of the Great Comet of 1577 showed that it was far ...
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.