Telescopes: More Than Meets the Eye
... (some answers in italics!) 1. What are the three main functions of a telescope? (the three main functions listed in order of importance are 1. light gathering 2. resolution 3. magnification) 2. What are some uses for a telescope? 3. Why does a stick appear to bend when it is placed partially in wate ...
... (some answers in italics!) 1. What are the three main functions of a telescope? (the three main functions listed in order of importance are 1. light gathering 2. resolution 3. magnification) 2. What are some uses for a telescope? 3. Why does a stick appear to bend when it is placed partially in wate ...
The Color of Plants on Other Worlds
... a second type of reaction to form the sugar. Each photon must have a minimum amount of energy to drive the reactions. The way plants harvest sunlight is a marvel of nature. Photosynthetic pigments such as chlorophyll are not isolated molecules. They operate in a network like an array of antennas, ea ...
... a second type of reaction to form the sugar. Each photon must have a minimum amount of energy to drive the reactions. The way plants harvest sunlight is a marvel of nature. Photosynthetic pigments such as chlorophyll are not isolated molecules. They operate in a network like an array of antennas, ea ...
hst/stis spectroscopy of the environment in the starburst core of m82
... The bar x1- and x2-orbits are shown with an outlined and filled ellipse. The majoraxis of the bar extends along the x1-orbits and is 1 kpc in length. At the ends of the bar, molecular material and dust (hatched regions) correspond to the location of the PDR hot-spots in the Lord et al. (1996) ISM mo ...
... The bar x1- and x2-orbits are shown with an outlined and filled ellipse. The majoraxis of the bar extends along the x1-orbits and is 1 kpc in length. At the ends of the bar, molecular material and dust (hatched regions) correspond to the location of the PDR hot-spots in the Lord et al. (1996) ISM mo ...
Night Sky
... Because the earth is rotating the sky appears to rotate. Viewed from above the north pole, the earth is rotating counter-clockwise. For an observer on the earth, objects move from east to west (this is true for both northern and southern hemispheres). More accurately put, when looking north, objects ...
... Because the earth is rotating the sky appears to rotate. Viewed from above the north pole, the earth is rotating counter-clockwise. For an observer on the earth, objects move from east to west (this is true for both northern and southern hemispheres). More accurately put, when looking north, objects ...
Enhanced lithium depletion in Sun-like stars with orbiting planets.
... 451 stars in the HARPS high precision (better than 1 m/s) radial velocity exoplanet survey11 spanning the effective temperature range between 4900 and 6500 K. These are unevolved, slowly rotating non-active stars from a CORALIE catalogue11. These stars have been monitored with high precision spectro ...
... 451 stars in the HARPS high precision (better than 1 m/s) radial velocity exoplanet survey11 spanning the effective temperature range between 4900 and 6500 K. These are unevolved, slowly rotating non-active stars from a CORALIE catalogue11. These stars have been monitored with high precision spectro ...
Astronomical units
... Vega has T = 9500 K, by definition color is zero. Which sense for hotter / cooler stars? ...
... Vega has T = 9500 K, by definition color is zero. Which sense for hotter / cooler stars? ...
SGR and AXP – are they magnetars?
... of which are much stronger than those of ordinary pulsars. Several independent arguments point to a neutron star with B_dipole~5x10^14 G as the source of the March 5 event. A very strong field can (i) spin down the star to an 8-s period in the ~10^4-yr age of the surrounding supernova remnant N49; ( ...
... of which are much stronger than those of ordinary pulsars. Several independent arguments point to a neutron star with B_dipole~5x10^14 G as the source of the March 5 event. A very strong field can (i) spin down the star to an 8-s period in the ~10^4-yr age of the surrounding supernova remnant N49; ( ...
Notes in pdf format
... (a) Find the magnitude of the acceleration of the system (b) Determine the magnitude of the contact force between the two blocks (c) When the force is applied toward the left on m2, is the magnitude of the contact force the same as it was when the force was applied toward the right on m1? (a) “parti ...
... (a) Find the magnitude of the acceleration of the system (b) Determine the magnitude of the contact force between the two blocks (c) When the force is applied toward the left on m2, is the magnitude of the contact force the same as it was when the force was applied toward the right on m1? (a) “parti ...
The Milky Way: Spiral galaxies:
... •! HI gas is optically thin: the 21 cm line suffers almost no absorption. Note that spin flips are classically “forbidden”: on average, a single hydrogen atom will take 107 years to decay! The probability of an absorption is even rarer. •! HI gas mass is directly proportional to 21 cm line intensity ...
... •! HI gas is optically thin: the 21 cm line suffers almost no absorption. Note that spin flips are classically “forbidden”: on average, a single hydrogen atom will take 107 years to decay! The probability of an absorption is even rarer. •! HI gas mass is directly proportional to 21 cm line intensity ...
The Teleological Argument - University of Colorado Boulder
... Paley suggests that the reason for this is that the pocket watch shows evidence of some complexity and design for a specific purpose. He notes: that its several parts are framed and put together for a purpose, e.g., that they are so formed and adjusted as to produce motion, and that motion so regula ...
... Paley suggests that the reason for this is that the pocket watch shows evidence of some complexity and design for a specific purpose. He notes: that its several parts are framed and put together for a purpose, e.g., that they are so formed and adjusted as to produce motion, and that motion so regula ...
a report on pulsars, written for PHAS1901
... dispersion. All electromagnetic radiation moves at a constant speed through a vacuum, but is slowed proportionally to it's wavelength when it travels through a medium. the interstellar medium is often regarded as a vacuum, but in actual fact is occupied by atoms and free electrons, albeit at extreme ...
... dispersion. All electromagnetic radiation moves at a constant speed through a vacuum, but is slowed proportionally to it's wavelength when it travels through a medium. the interstellar medium is often regarded as a vacuum, but in actual fact is occupied by atoms and free electrons, albeit at extreme ...
Section9 - University of Chicago
... very blue spectral continuum, and have very strong and wide emission lines) they can be reliably isolated from stars either using multi-color images, or spectral surveys. In particular, quasars show a UV excess relative to stars, even if both appear as point sources in telescopes. ...
... very blue spectral continuum, and have very strong and wide emission lines) they can be reliably isolated from stars either using multi-color images, or spectral surveys. In particular, quasars show a UV excess relative to stars, even if both appear as point sources in telescopes. ...
Exercise Solutions
... where T is the effective surface temperature and where the luminosity computed above and the effective solar surface temperature Tˇ D 5780 K have been used. From the known radius of the Sun, this gives a radius of about 1.5 AU (approximately the radius of the orbit of Mars) and an average density of ...
... where T is the effective surface temperature and where the luminosity computed above and the effective solar surface temperature Tˇ D 5780 K have been used. From the known radius of the Sun, this gives a radius of about 1.5 AU (approximately the radius of the orbit of Mars) and an average density of ...
1 - People Server at UNCW
... Show sufficient work or rationale for full credit. Remember that some problems may require less work than brute force methods. If you are stuck, or running out of time, indicate as completely as possible, the methods and steps you would take to tackle the problem. Also, indicate any relevant informa ...
... Show sufficient work or rationale for full credit. Remember that some problems may require less work than brute force methods. If you are stuck, or running out of time, indicate as completely as possible, the methods and steps you would take to tackle the problem. Also, indicate any relevant informa ...
astronomy
... Discuss the nature of the Sun’s magnetic field and its relationship to the various types of solar activity. Outline the process by which energy is produced in the Sun’s interior. Sketch the structure of the Sun and identify the corona, chromosphere, photosphere, convection zone, radiation zone and c ...
... Discuss the nature of the Sun’s magnetic field and its relationship to the various types of solar activity. Outline the process by which energy is produced in the Sun’s interior. Sketch the structure of the Sun and identify the corona, chromosphere, photosphere, convection zone, radiation zone and c ...
Topic 2 Chemical Composition of Stars
... The spectra that are observed depend very much on the temperature and pressure in the stellar atmosphere The hotter the temperature the greater the mean thermal energy • Break up of molecules • Ionization of atoms • Those atoms with the highest binding energy are only seen in their ionized state ...
... The spectra that are observed depend very much on the temperature and pressure in the stellar atmosphere The hotter the temperature the greater the mean thermal energy • Break up of molecules • Ionization of atoms • Those atoms with the highest binding energy are only seen in their ionized state ...
f - 廖寶珊紀念書院Liu Po Shan Memorial College
... telephone poles or road signs, laser pulses could be reflected/scattered from these obstacles causing confusions to the Laser Gun. ...
... telephone poles or road signs, laser pulses could be reflected/scattered from these obstacles causing confusions to the Laser Gun. ...
EARTH & SPACE SCIENCE
... Because each element produces a unique pattern of spectral lines, astronomers can match the spectral lines of starlight to those of Earth’s elements, and identify the elements in the star’s atmosphere. Both hydrogen and helium occur in the sun. About 75% of the sun’s mass is hydrogen, and hydrogen a ...
... Because each element produces a unique pattern of spectral lines, astronomers can match the spectral lines of starlight to those of Earth’s elements, and identify the elements in the star’s atmosphere. Both hydrogen and helium occur in the sun. About 75% of the sun’s mass is hydrogen, and hydrogen a ...
Galileo & the Telescope—Sept 21
... in a few days she was reduced to a semicircle. She maintained this shape for many days, all the while, however, growing in size. At present, she is becoming sickle-shaped… ...
... in a few days she was reduced to a semicircle. She maintained this shape for many days, all the while, however, growing in size. At present, she is becoming sickle-shaped… ...
R136a1
RMC 136a1 (usually abbreviated to R136a1) is a Wolf-Rayet star located at the center of R136, the central condensation of stars of the large NGC 2070 open cluster in the Tarantula Nebula. It lies at a distance of about 50 kiloparsecs (163,000 light-years) in the Large Magellanic Cloud. It has the highest mass and luminosity of any known star, at 265 M☉ and 8.7 million L☉, and also one of the hottest at over 50,000 K.