THE CELESTIAL SPHERE
... between them is of no consequence to day-to-day observations. We therefore imagine the stars to remain fixed on a sphere of very large radius with the earth at its centre. We call this sphere the celestial sphere. At any point of time we can only see the upper half of the celestial sphere. The point ...
... between them is of no consequence to day-to-day observations. We therefore imagine the stars to remain fixed on a sphere of very large radius with the earth at its centre. We call this sphere the celestial sphere. At any point of time we can only see the upper half of the celestial sphere. The point ...
The Stars education kit - Student activities 1-4
... 7. Cover the balls representing α, β and δ in aluminium foil or blue cellophane using glue or sticky-tape. (They are blue-white stars). 8. Cover the ball representing γ in red cellophane and the ball representing ε in orange cellophane in the same way. 9. Place the skewers in their correct positions ...
... 7. Cover the balls representing α, β and δ in aluminium foil or blue cellophane using glue or sticky-tape. (They are blue-white stars). 8. Cover the ball representing γ in red cellophane and the ball representing ε in orange cellophane in the same way. 9. Place the skewers in their correct positions ...
1 Star Formation and Main Sequence Evolution Condensation
... equilibrium producing a newborn stable zero-age main sequence star ...
... equilibrium producing a newborn stable zero-age main sequence star ...
Lecture18
... • Stars come in many luminosities • If astronomers could tell what the luminosity of a star ...
... • Stars come in many luminosities • If astronomers could tell what the luminosity of a star ...
What are constellations? - Red Hook Central Schools
... Throughout the year, the apparent diameter of the sun changes in a cyclic fashion due to the Earth’s slightly elliptical orbit As the Earth revolves around the sun, it is moving towards a star for half the year, away from the star the other have, resulting in a blue-shift/red-shift effect on the ...
... Throughout the year, the apparent diameter of the sun changes in a cyclic fashion due to the Earth’s slightly elliptical orbit As the Earth revolves around the sun, it is moving towards a star for half the year, away from the star the other have, resulting in a blue-shift/red-shift effect on the ...
The life and times of stars
... A galaxy will give out a continuous spectrum as it has billions of different sources The surface of the Sun gives out a continuous spectrum – it is an incandescent body The Sun’s atmosphere will produce an absorption spectrum as it is a gas that the Sun’s light is shining through Most nebula will pr ...
... A galaxy will give out a continuous spectrum as it has billions of different sources The surface of the Sun gives out a continuous spectrum – it is an incandescent body The Sun’s atmosphere will produce an absorption spectrum as it is a gas that the Sun’s light is shining through Most nebula will pr ...
PHYSICS 113 Practice Questions #2
... a. a distant galaxy of stars and raw material b. a small disk of gas and dust surrounding a single star that was recently formed c. a cloud o f gas and du st illuminated by th e light of newly form ed stars within it d. the remnant of a star that exploded several thousand years ago e. an illusion ca ...
... a. a distant galaxy of stars and raw material b. a small disk of gas and dust surrounding a single star that was recently formed c. a cloud o f gas and du st illuminated by th e light of newly form ed stars within it d. the remnant of a star that exploded several thousand years ago e. an illusion ca ...
Astr604-Ch1
... to obtain the magnitudes. Detectors of electromagnetic radiation are sensitive only over given wavelength bands. Because the flux of star light varies with wavelength, the magnitude of a star depends on the wavelength interval at which we observe. Originally, photographic plates were sensitive only ...
... to obtain the magnitudes. Detectors of electromagnetic radiation are sensitive only over given wavelength bands. Because the flux of star light varies with wavelength, the magnitude of a star depends on the wavelength interval at which we observe. Originally, photographic plates were sensitive only ...
Chapter 2 - Cameron University
... • Because of the general east to west motion of objects in the sky, geocentric theories were developed to explain the motions • Eudoxus (400-347 B.C.) proposed a geocentric model in which each celestial object was mounted on its own revolving transparent sphere with its own separate tilt • The faste ...
... • Because of the general east to west motion of objects in the sky, geocentric theories were developed to explain the motions • Eudoxus (400-347 B.C.) proposed a geocentric model in which each celestial object was mounted on its own revolving transparent sphere with its own separate tilt • The faste ...
Instrument for finding planets15 Apr
... – Left & right side of slit focus on detector separated by 3 pixels. – 3 pixels is also 1.1nm in wavelength or 150km/s – Placing the star on the left rather than the right side of the slit is equivalent to shifting the Doppler speed by 150km/s. • This is 3000 times worse than the ideal. • That ligh ...
... – Left & right side of slit focus on detector separated by 3 pixels. – 3 pixels is also 1.1nm in wavelength or 150km/s – Placing the star on the left rather than the right side of the slit is equivalent to shifting the Doppler speed by 150km/s. • This is 3000 times worse than the ideal. • That ligh ...
Red Giants - Faculty Web Pages
... same way as air expanding out of a tank causes your refrigerator to cool down!). Cooler gases are, of course, redder, as described by Wien's Law, so the star gets redder. You would also think it would get dimmer, since cooler gases are also dimmer, according to the Stefan-Boltzmann Law. But the expa ...
... same way as air expanding out of a tank causes your refrigerator to cool down!). Cooler gases are, of course, redder, as described by Wien's Law, so the star gets redder. You would also think it would get dimmer, since cooler gases are also dimmer, according to the Stefan-Boltzmann Law. But the expa ...
The Cosmic Near-Infrared Background: Remnant light form
... due to the mass spectrum could be large. •An accurate determination of the near-infrared background allows us to probe the formation history of early stars, which is difficult to constrain by other means. •A reasonable initial mass function, coupled with this star formation rate, does not overproduc ...
... due to the mass spectrum could be large. •An accurate determination of the near-infrared background allows us to probe the formation history of early stars, which is difficult to constrain by other means. •A reasonable initial mass function, coupled with this star formation rate, does not overproduc ...
Announcements
... Astronomers are all over the world and measure coordinates at all sorts of times. In order to talk to each other, astronomers measure coordinates with respect to defined reference points on the celestial sphere, not the local sky. • Declination: angle from the celestial equator up to the star (analo ...
... Astronomers are all over the world and measure coordinates at all sorts of times. In order to talk to each other, astronomers measure coordinates with respect to defined reference points on the celestial sphere, not the local sky. • Declination: angle from the celestial equator up to the star (analo ...
Fulltext PDF - Indian Academy of Sciences
... the Sun and any star. Hence there would be no Doppler shift. However, there would be proper motion since the direction of the Sun-star line would rotate at Ω. This contributes a term independent of θ to the proper motion. (b) The effect of ‘differential rotation’. This term refers to the variation o ...
... the Sun and any star. Hence there would be no Doppler shift. However, there would be proper motion since the direction of the Sun-star line would rotate at Ω. This contributes a term independent of θ to the proper motion. (b) The effect of ‘differential rotation’. This term refers to the variation o ...
Stars Crossword
... 4. a singularity whose gravity is so strong that nothing can escape - not even light 5. the area surrounding a blackhole where at that point nothing can escape 9. the middle age stage of a small star like ours 11. when a very large star's outer layer explodes outward with an amazing amount of force ...
... 4. a singularity whose gravity is so strong that nothing can escape - not even light 5. the area surrounding a blackhole where at that point nothing can escape 9. the middle age stage of a small star like ours 11. when a very large star's outer layer explodes outward with an amazing amount of force ...
Galactic Star Formation Science with Integral Field
... – Gemini LGS AO w/ NIFS = Goal - Determine if H2 gas traces disk material in the BD candidate environment - it doesn’t! – Data reveals fspatially resolved 2-D spectral images of a well collimated jet from a very young BD candidate – BLUE-shifted, collimated [Fe II] jet associated with the brighter l ...
... – Gemini LGS AO w/ NIFS = Goal - Determine if H2 gas traces disk material in the BD candidate environment - it doesn’t! – Data reveals fspatially resolved 2-D spectral images of a well collimated jet from a very young BD candidate – BLUE-shifted, collimated [Fe II] jet associated with the brighter l ...
Stars
... low density outer envelope completely off the star. • As it expands, its opacity drops and we see to a deeper and deeper and hotter and hotter depth, so the star moves left on the HR diagram • Until… we see the electron degenerate core; the new white dwarf created at the center • This core can now c ...
... low density outer envelope completely off the star. • As it expands, its opacity drops and we see to a deeper and deeper and hotter and hotter depth, so the star moves left on the HR diagram • Until… we see the electron degenerate core; the new white dwarf created at the center • This core can now c ...
Other Galaxies, their Distances, and the Expansion of the Universe
... variable stars) to measure the distances of about 50 galaxies. n This work proved that the Andromeda galaxy was not part of the Milky Way. n Hubble and his staff then measured the redshifts (remember the Doppler Shift) of the galaxies. They were shocked with what they found. n ...
... variable stars) to measure the distances of about 50 galaxies. n This work proved that the Andromeda galaxy was not part of the Milky Way. n Hubble and his staff then measured the redshifts (remember the Doppler Shift) of the galaxies. They were shocked with what they found. n ...
DO NOW - PBworks
... The student is expected to explore how different wavelengths of the electromagnetic spectrum such as light and radio waves are used to gain information about distances and properties of components in the universe. ...
... The student is expected to explore how different wavelengths of the electromagnetic spectrum such as light and radio waves are used to gain information about distances and properties of components in the universe. ...
Lecture 19 - Stellar Lifecycles
... away from the core. will eventually be dispersed into space This material forms a forming a planetary nebula like this one. nebula surrounding the ...
... away from the core. will eventually be dispersed into space This material forms a forming a planetary nebula like this one. nebula surrounding the ...
Hipparcos
Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993. It was the first space experiment devoted to precision astrometry, the accurate measurement of the positions of celestial objects on the sky. This permitted the accurate determination of proper motions and parallaxes of stars, allowing a determination of their distance and tangential velocity. When combined with radial-velocity measurements from spectroscopy, this pinpointed all six quantities needed to determine the motion of stars. The resulting Hipparcos Catalogue, a high-precision catalogue of more than 118,200 stars, was published in 1997. The lower-precision Tycho Catalogue of more than a million stars was published at the same time, while the enhanced Tycho-2 Catalogue of 2.5 million stars was published in 2000. Hipparcos ' follow-up mission, Gaia, was launched in 2013.The word ""Hipparcos"" is an acronym for High precision parallax collecting satellite and also a reference to the ancient Greek astronomer Hipparchus of Nicaea, who is noted for applications of trigonometry to astronomy and his discovery of the precession of the equinoxes.