Slide 1
... If we make a graph of how fast stars in the arms move compared to distance, we get line “B”. The fact that all the stars go the same speed explains why the spiral arms don’t twist up, but it doesn’t make sense. According to physics, the speeds should be following line “A”. Something is making the st ...
... If we make a graph of how fast stars in the arms move compared to distance, we get line “B”. The fact that all the stars go the same speed explains why the spiral arms don’t twist up, but it doesn’t make sense. According to physics, the speeds should be following line “A”. Something is making the st ...
epsilon Aur
... Epsilon Aurigae is not the brightest eclipsing binary, nor is it the one with the deepest eclipses. What makes it distinctive is its long period of over 27 years, coupled with the mystery surrounding the nature of the secondary object in the system. The last primary eclipse took place during 1982-84 ...
... Epsilon Aurigae is not the brightest eclipsing binary, nor is it the one with the deepest eclipses. What makes it distinctive is its long period of over 27 years, coupled with the mystery surrounding the nature of the secondary object in the system. The last primary eclipse took place during 1982-84 ...
The Milky Way: Spiral galaxies:
... spiral will suffer more internal extinction than a face-on spiral by Ai-Ai=0 = c (sec i - sec(0)) = c (sec i - 1) ...
... spiral will suffer more internal extinction than a face-on spiral by Ai-Ai=0 = c (sec i - sec(0)) = c (sec i - 1) ...
The Significance of Mega Stars
... expansion of consciousness to include the whole of the Milky Way galaxy, not just the Orion Arm. The famous Bayer catalog of stars compiled in 1603 by Johann Bayer assigns Greek letters to the brightest stars visible in each constellation, usually in descending order of apparent brightness (but Bay ...
... expansion of consciousness to include the whole of the Milky Way galaxy, not just the Orion Arm. The famous Bayer catalog of stars compiled in 1603 by Johann Bayer assigns Greek letters to the brightest stars visible in each constellation, usually in descending order of apparent brightness (but Bay ...
Chapter 16 - Astronomy
... 4. We now know the nature of our Galaxy and other galaxies is closer to Curtis’ explanation. Shapley had made use of some incorrect data and misinterpreted observations of Cepheid variables because it was not known at the time that there were different types. Shapley was more correct in his ideas ab ...
... 4. We now know the nature of our Galaxy and other galaxies is closer to Curtis’ explanation. Shapley had made use of some incorrect data and misinterpreted observations of Cepheid variables because it was not known at the time that there were different types. Shapley was more correct in his ideas ab ...
Climbing the Distance Ladder
... Find a star with a spectrum identical to the Sun’s (for instance). Measure the star’s flux f. Assume the star’s luminosity is the same as the Sun’s (L = 4 × 1026 watts). Compute the star’s distance: ...
... Find a star with a spectrum identical to the Sun’s (for instance). Measure the star’s flux f. Assume the star’s luminosity is the same as the Sun’s (L = 4 × 1026 watts). Compute the star’s distance: ...
March 2016 BRAS Addendum Newsletter
... star that is a spectroscopic binary. There is a 5 th component, a mag. 10.0 star at a separation of 13,000 AU (0.21 light year). Tau CMa is the brightest star of the open cluster NGC 2362 (Caldwell 64), which is why the cluster is sometimes called the Tau Canis Major Cluster. HD B47536, mag. 5.25, 0 ...
... star that is a spectroscopic binary. There is a 5 th component, a mag. 10.0 star at a separation of 13,000 AU (0.21 light year). Tau CMa is the brightest star of the open cluster NGC 2362 (Caldwell 64), which is why the cluster is sometimes called the Tau Canis Major Cluster. HD B47536, mag. 5.25, 0 ...
Hertzsprung Rusell Diagram KLT
... Stars that look to us as though they are near each other, may intact be very far away from each other. Distant but very bright stars look similar to close but dim stars. ...
... Stars that look to us as though they are near each other, may intact be very far away from each other. Distant but very bright stars look similar to close but dim stars. ...
Galaxies
... protogalactic clouds that were able to cool and form stars before gas settled into a disk ...
... protogalactic clouds that were able to cool and form stars before gas settled into a disk ...
THE ORION CONSTELLATION the Great Hunter
... 3. Bellatrix (Gamma Orionis), sometimes also known as the Amazon Star, is the third brightest star in Orion and the 27th brightest star in the sky, only slightly dimmer than Castor in Gemini. Its name comes from the Latin word for “the female warrior.” It has a mean apparent visual magnitude of 1.64 ...
... 3. Bellatrix (Gamma Orionis), sometimes also known as the Amazon Star, is the third brightest star in Orion and the 27th brightest star in the sky, only slightly dimmer than Castor in Gemini. Its name comes from the Latin word for “the female warrior.” It has a mean apparent visual magnitude of 1.64 ...
Supermassive Black Holes in Inactive Galaxies Encyclopedia of Astronomy & Astrophysics eaa.iop.org
... GROUP. At a distance of 0.77 Mpc, it is the nearest giant galaxy outside our own. It can therefore be studied in unusual detail. M31 contains the nearest example of a nuclear star cluster embedded in a normal bulge. When examined with HST, the nucleus appears double (figure 3). This is very surprisi ...
... GROUP. At a distance of 0.77 Mpc, it is the nearest giant galaxy outside our own. It can therefore be studied in unusual detail. M31 contains the nearest example of a nuclear star cluster embedded in a normal bulge. When examined with HST, the nucleus appears double (figure 3). This is very surprisi ...
Spiral galaxies: Spiral galaxies: Inclination Spiral galaxies: Internal
... • To first order, cos i = b/a where a & b are the observed major and minor axes (assume disk is intrinsically circular) • But this implies galaxies have zero thickness at i = 90°! Better to assume that spirals are oblate ellipsoids with intrinsic axis ratios a:a:c. If q = c/a, then after a bit a sim ...
... • To first order, cos i = b/a where a & b are the observed major and minor axes (assume disk is intrinsically circular) • But this implies galaxies have zero thickness at i = 90°! Better to assume that spirals are oblate ellipsoids with intrinsic axis ratios a:a:c. If q = c/a, then after a bit a sim ...
fred`s 2017 astronomy challenge
... others of us to get used to searching the skies and learning where some of the easiest things to find are. There should be all the details you will need to find the objects, and I have lis ...
... others of us to get used to searching the skies and learning where some of the easiest things to find are. There should be all the details you will need to find the objects, and I have lis ...
public_lector_10
... Now we think it comes and goes, as in the movie - needs gas to maintain the spiral structure and star formation. Without replenishment of the gas, the star formation and spiral structure should go out in a few Gyr. Some gas comes from dying stars, but not enough. New gas may come from the infall of ...
... Now we think it comes and goes, as in the movie - needs gas to maintain the spiral structure and star formation. Without replenishment of the gas, the star formation and spiral structure should go out in a few Gyr. Some gas comes from dying stars, but not enough. New gas may come from the infall of ...
chapter15SurveyStars..
... • Stellar properties depend on both mass and age: those that have finished fusing H to He in their cores are no longer on the main sequence • All stars become larger and redder after exhausting their core hydrogen: giants and ...
... • Stellar properties depend on both mass and age: those that have finished fusing H to He in their cores are no longer on the main sequence • All stars become larger and redder after exhausting their core hydrogen: giants and ...
Photometry – I. “All sky”
... years, you might not even be able to get the same glass that was used previously. Detectors are also not really uniform; CCDs are much more red-sensitive than photomultipliers and different types (of either) might have significantly different responses as a function of wavelength. At the same time, ...
... years, you might not even be able to get the same glass that was used previously. Detectors are also not really uniform; CCDs are much more red-sensitive than photomultipliers and different types (of either) might have significantly different responses as a function of wavelength. At the same time, ...
MS 1512–CB58 - Columbia University Department of Astronomy
... the star formation rate, SFR 40M yr , deduced from the far-UV luminosity L1500 after correcting for a factor of ∼ 7 attenuation by dust extinction. This and other empirical properties we have delineated will provide constraints to future modelling of such superwinds from starburst galaxies. Compa ...
... the star formation rate, SFR 40M yr , deduced from the far-UV luminosity L1500 after correcting for a factor of ∼ 7 attenuation by dust extinction. This and other empirical properties we have delineated will provide constraints to future modelling of such superwinds from starburst galaxies. Compa ...
Universe 8e Lecture Chapter 24 Galaxies
... Elliptical galaxies are nearly devoid of interstellar gas and dust, and so star formation is severely inhibited. Lenticular galaxies are intermediate between spiral and elliptical galaxies. Irregular galaxies have ill-defined, asymmetrical shapes. They are often found associated with other galaxies. ...
... Elliptical galaxies are nearly devoid of interstellar gas and dust, and so star formation is severely inhibited. Lenticular galaxies are intermediate between spiral and elliptical galaxies. Irregular galaxies have ill-defined, asymmetrical shapes. They are often found associated with other galaxies. ...
CHP 15
... a. they did not count the brightest stars. b. they did not study the southern sky. c. they did not have large enough telescopes. d. they only observed stars in the disk of the galaxy and not the halo. e. they did not know about interstellar dust clouds. 2. Which of the following is not a characteris ...
... a. they did not count the brightest stars. b. they did not study the southern sky. c. they did not have large enough telescopes. d. they only observed stars in the disk of the galaxy and not the halo. e. they did not know about interstellar dust clouds. 2. Which of the following is not a characteris ...
Devil physics The baddest class on campus IB Physics
... Apparent magnitude is based on view from earth Two stars may have the same apparent ...
... Apparent magnitude is based on view from earth Two stars may have the same apparent ...
A Collection of Curricula for the STARLAB Deep Sky Objects
... Nebulae are very important in astronomy because they are the key to understanding the birth of stars. All stars, including the sun, formed from nebulae like the Orion Nebula. Astronomers have also found, however, that certain types of nebulae mark the death of stars (see slides #62 and 63). In old a ...
... Nebulae are very important in astronomy because they are the key to understanding the birth of stars. All stars, including the sun, formed from nebulae like the Orion Nebula. Astronomers have also found, however, that certain types of nebulae mark the death of stars (see slides #62 and 63). In old a ...
Aries (constellation)
Aries is one of the constellations of the zodiac. It is located in the northern celestial hemisphere between Pisces to the west and Taurus to the east. The name Aries is Latin for ram, and its symbol is 20px (Unicode ♈), representing a ram's horns. It is one of the 48 constellations described by the 2nd century astronomer Ptolemy, and remains one of the 88 modern constellations. It is a mid-sized constellation, ranking 39th overall size, with an area of 441 square degrees (1.1% of the celestial sphere).Although Aries came to represent specifically the ram whose fleece became the Golden Fleece of Ancient Greek mythology, it has represented a ram since late Babylonian times. Before that, the stars of Aries formed a farmhand. Different cultures have incorporated the stars of Aries into different constellations including twin inspectors in China and a porpoise in the Marshall Islands. Aries is a relatively dim constellation, possessing only four bright stars: Hamal (Alpha Arietis, second magnitude), Sheratan (Beta Arietis, third magnitude), Mesarthim (Gamma Arietis, fourth magnitude), and 41 Arietis (also fourth magnitude). The few deep-sky objects within the constellation are quite faint and include several pairs of interacting galaxies. Several meteor showers appear to radiate from Aries, including the Daytime Arietids and the Epsilon Arietids.