A New Variable Star in Perseus
... robotic telescope operated without filters. A code of Schwarzenberg-Czerny (1989, 1996) was used in order to find the period of variable star. The period of variable star was determined as P=0d.55120.0005 using the first observational point as an initial epoch. Multi-colour observations of GSC 3692 ...
... robotic telescope operated without filters. A code of Schwarzenberg-Czerny (1989, 1996) was used in order to find the period of variable star. The period of variable star was determined as P=0d.55120.0005 using the first observational point as an initial epoch. Multi-colour observations of GSC 3692 ...
Airway Luminal Diameter and Shape Measurement by Means of an
... Figure Legend: Tracheal measurement model identical to that illustrated in Figure 3 except using greater distance (y2). A, White light passed from a tungsten-halogen source is collimated and directed at a diffraction grating to form a spectrum on the luminal surface of the divided trachea. The optic ...
... Figure Legend: Tracheal measurement model identical to that illustrated in Figure 3 except using greater distance (y2). A, White light passed from a tungsten-halogen source is collimated and directed at a diffraction grating to form a spectrum on the luminal surface of the divided trachea. The optic ...
PowerPoint version
... case of reflection created when when a light passes from a more optically dense medium to a less dense one at an angle such that there is no refracted ray. ...
... case of reflection created when when a light passes from a more optically dense medium to a less dense one at an angle such that there is no refracted ray. ...
Catherine and Puti 7F
... We don't often think of the Sun as having cooler areas on its surface. The Sun is too hot for an astronaut to go on the sun, but there are areas which are a bit cooler than others. These areas are called sun spots. Sun spots are still very hot. However, because they are a bit cooler than the rest of ...
... We don't often think of the Sun as having cooler areas on its surface. The Sun is too hot for an astronaut to go on the sun, but there are areas which are a bit cooler than others. These areas are called sun spots. Sun spots are still very hot. However, because they are a bit cooler than the rest of ...
55 Ignacio Negueruela and Amparo Marco
... Be 55 is a faint, compact open cluster in the constellation Cygnus. The WEBDA database1 provides coordinates R.A.: 21h 16m 58s , decl.: +51◦ 45 32 ( = 93.◦ 03, b = +1.◦ 80). Maciejewski & Niedzielski (2007) presented BV photometry of an extended field around the obvious cluster core and found it ...
... Be 55 is a faint, compact open cluster in the constellation Cygnus. The WEBDA database1 provides coordinates R.A.: 21h 16m 58s , decl.: +51◦ 45 32 ( = 93.◦ 03, b = +1.◦ 80). Maciejewski & Niedzielski (2007) presented BV photometry of an extended field around the obvious cluster core and found it ...
How astronomers measure brightness and colours – the magnitude
... usually constructed with a redder filter being subtracted from a bluer filter. If we compare two galaxies which have B − V = 2.0 and B − V = −1.0 we can say that the first galaxy is redder than the second. Note that the B − V = 0 limit is an arbitrary boundary. If the Johnson-Morgan-Cousin system is ...
... usually constructed with a redder filter being subtracted from a bluer filter. If we compare two galaxies which have B − V = 2.0 and B − V = −1.0 we can say that the first galaxy is redder than the second. Note that the B − V = 0 limit is an arbitrary boundary. If the Johnson-Morgan-Cousin system is ...
Document
... that there is a black hole that came from a massive star: – Strong X-ray sources (usually flares). – Optically dark objects (that is, only one star is seen in the spectrum, and it is the mass-losing one). – Masses too large to be a white dwarf or a neutron star. ...
... that there is a black hole that came from a massive star: – Strong X-ray sources (usually flares). – Optically dark objects (that is, only one star is seen in the spectrum, and it is the mass-losing one). – Masses too large to be a white dwarf or a neutron star. ...
The Earth – which picture is correct?
... • The Sun and Moon always move eastwards on their sphere. • Inferior planets move eastwards then reverse direction. • Superior planets usually move eastwards. They move westwards very rarely. • Planets change speed and brightness over time, but there is a pattern in these changes. ...
... • The Sun and Moon always move eastwards on their sphere. • Inferior planets move eastwards then reverse direction. • Superior planets usually move eastwards. They move westwards very rarely. • Planets change speed and brightness over time, but there is a pattern in these changes. ...
PHYS3380_102815_bw - The University of Texas at Dallas
... confined to a narrow beam within a few billion miles of their source. - not known how the jets are focused, or collimated. Suggested that magnetic fields, generated by the star or disk, might constrain the jets. When they strike interstellar medium/nebula - produce Herbig Haro Objects small nebulae ...
... confined to a narrow beam within a few billion miles of their source. - not known how the jets are focused, or collimated. Suggested that magnetic fields, generated by the star or disk, might constrain the jets. When they strike interstellar medium/nebula - produce Herbig Haro Objects small nebulae ...
AST 3033
... from your instructor, via e-mail or after class assistance. No excuses for failure…just do it! Attached is the set of chapter objectives for the term. Also you will receive a sky map and calendar for the start of the term. New maps for each month will be passed out later. We will study the spring st ...
... from your instructor, via e-mail or after class assistance. No excuses for failure…just do it! Attached is the set of chapter objectives for the term. Also you will receive a sky map and calendar for the start of the term. New maps for each month will be passed out later. We will study the spring st ...
Scales of Space and Time
... A great island of stars in space, all held together by gravity and orbiting a common center ...
... A great island of stars in space, all held together by gravity and orbiting a common center ...
Radio Bubbles, Cooling X-ray Gas, Galaxy Interactions, and Star
... solution to the header of the combined narrow-band image using tools available in WCSTools (v. 3.6.3, available from the Smithsonian Astrophysical Observatories). We matched the positions of 13 objects in the field to a catalog of USNO-A2 stars and galaxies. These measurements provided the central a ...
... solution to the header of the combined narrow-band image using tools available in WCSTools (v. 3.6.3, available from the Smithsonian Astrophysical Observatories). We matched the positions of 13 objects in the field to a catalog of USNO-A2 stars and galaxies. These measurements provided the central a ...
Ursa Major, the Great Bear
... M101 is a splendid face-on galaxy, which shows a distinct asymmetry in long exposure photographs. The giant spiral disk of stars, dust, and gas is 170,000 light-years across, almost twice the size of our Milky Way Galaxy. M101 is estimated to contain at least one trillion stars. M101 lies on the e ...
... M101 is a splendid face-on galaxy, which shows a distinct asymmetry in long exposure photographs. The giant spiral disk of stars, dust, and gas is 170,000 light-years across, almost twice the size of our Milky Way Galaxy. M101 is estimated to contain at least one trillion stars. M101 lies on the e ...
Chapter 13 Neutron Stars and Black Holes
... bursts have been observed shows no “clumping” of bursts anywhere, particularly not within the Milky Way. Therefore, the bursts must originate from outside our Galaxy. ...
... bursts have been observed shows no “clumping” of bursts anywhere, particularly not within the Milky Way. Therefore, the bursts must originate from outside our Galaxy. ...
No Slide Title
... years ago, before galaxies (and us) had the chance to form? Or why didn’t it wait until the far future, so today ...
... years ago, before galaxies (and us) had the chance to form? Or why didn’t it wait until the far future, so today ...
A photometrically and spectroscopically confirmed
... is calculated from the standard deviation of the subsequent Hα measurements. For four of the six galaxies, the measured value of any Hα is less than the estimated error in this measurement and we conclude their spectra are consistent with being passive. For the remaining two, IC 375 and CGCG 394−006 ...
... is calculated from the standard deviation of the subsequent Hα measurements. For four of the six galaxies, the measured value of any Hα is less than the estimated error in this measurement and we conclude their spectra are consistent with being passive. For the remaining two, IC 375 and CGCG 394−006 ...
UMich w/s - Royal Observatory, Edinburgh
... Either (i) determine mass profile from projected dispersion profile, with assumed isotropy, and smooth functional fit to the light profile Or (ii) assume a parameterised mass model M(r) and velocity dispersion anisotropy β(r) and fit dispersion profile to find best forms of these (for fixed light ...
... Either (i) determine mass profile from projected dispersion profile, with assumed isotropy, and smooth functional fit to the light profile Or (ii) assume a parameterised mass model M(r) and velocity dispersion anisotropy β(r) and fit dispersion profile to find best forms of these (for fixed light ...
Unit 3 - Lesson 8.9 Life of Stars Challenge
... These coloured Super Giants have luminosities often 1,000,000X greater than the Sun The explosive death of a star A cloud of hydrogen gas and dust in space. When the gravitational and pressure forces within the initial cloud become unbalanced, the cloud collapses and breaks into small fragments. The ...
... These coloured Super Giants have luminosities often 1,000,000X greater than the Sun The explosive death of a star A cloud of hydrogen gas and dust in space. When the gravitational and pressure forces within the initial cloud become unbalanced, the cloud collapses and breaks into small fragments. The ...
29.1 Directed Reading Guide
... a. Gases in the stars’ interiors emit specific wavelengths of light. b. Gases in the stars’ outer layers absorb specific wavelengths of light. c. Magnetic currents in the stars’ outer layers distort wavelengths of light. d. Gases in the stars’ outer layers emit specific wavelengths of light. _____ 7 ...
... a. Gases in the stars’ interiors emit specific wavelengths of light. b. Gases in the stars’ outer layers absorb specific wavelengths of light. c. Magnetic currents in the stars’ outer layers distort wavelengths of light. d. Gases in the stars’ outer layers emit specific wavelengths of light. _____ 7 ...
Astronomical spectroscopy
Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including visible light, which radiates from stars and other hot celestial objects. Spectroscopy can be used to derive many properties of distant stars and galaxies, such as their chemical composition, temperature, density, mass, distance, luminosity, and relative motion using Doppler shift measurements.