Powerpoint - Physics and Astronomy
... The Sun will evolve away from the main sequence when a) its core begins fusing iron. b) its supply of hydrogen is used up. c) the carbon core detonates, and it explodes as a Type I supernova. d) helium builds up in the core, while the hydrogen-burning shell expands. e) the core loses all of its neut ...
... The Sun will evolve away from the main sequence when a) its core begins fusing iron. b) its supply of hydrogen is used up. c) the carbon core detonates, and it explodes as a Type I supernova. d) helium builds up in the core, while the hydrogen-burning shell expands. e) the core loses all of its neut ...
Test 2 - Physics@Brock
... 45. A head-on collision between two elliptical galaxies is most likely to produce (a) complete destruction of most of the stars. (b) a single spiral galaxy. (c) a single open cluster. (d) a ring galaxy. (e) [Galaxy collisions are unknown.] 46. One of the predictions of Einstein’s theory of general r ...
... 45. A head-on collision between two elliptical galaxies is most likely to produce (a) complete destruction of most of the stars. (b) a single spiral galaxy. (c) a single open cluster. (d) a ring galaxy. (e) [Galaxy collisions are unknown.] 46. One of the predictions of Einstein’s theory of general r ...
Astronomy 401 Lecture 8 Spiral Galaxies II 1 The Tully
... Define the global pattern speed Ωgp : this is the angular speed of the spiral pattern. Viewed in a noninertial reference frame rotating with Ωgp , the spiral pattern is stationary. The stars aren’t necessarily stationary, however. Stars near the center of the galaxy can have orbital speeds shorter t ...
... Define the global pattern speed Ωgp : this is the angular speed of the spiral pattern. Viewed in a noninertial reference frame rotating with Ωgp , the spiral pattern is stationary. The stars aren’t necessarily stationary, however. Stars near the center of the galaxy can have orbital speeds shorter t ...
Hubble’s Law & Black Holes at a Galaxy’s Center
... black hole in M87, a big elliptical galaxy, use Kepler’s 3rd Law. Mass = R3/P2 = RV2 R = 60ly V = 800km/s M = 3BillionM~ = 3,000,000,000M~ ...
... black hole in M87, a big elliptical galaxy, use Kepler’s 3rd Law. Mass = R3/P2 = RV2 R = 60ly V = 800km/s M = 3BillionM~ = 3,000,000,000M~ ...
Neon Photoionization Experiments on the Z-Machine
... Same as the first simulations, but with mylar walls four times thicker (5.6 microns). Note that the heating of the gas is reduced by the absorption in the thicker walls. And also note that the shock waves are launched into the gas somewhat later than in the first simulation (at t=100 ns, the shock h ...
... Same as the first simulations, but with mylar walls four times thicker (5.6 microns). Note that the heating of the gas is reduced by the absorption in the thicker walls. And also note that the shock waves are launched into the gas somewhat later than in the first simulation (at t=100 ns, the shock h ...
SORTING SPECTRA
... Print enough color copies of the stellar spectra sheet so that you have one for every 2-4 students. Cut them apart and shuffle them out of order. Invite the students to discuss the spectrum—what do the different colors of light in a spectrum represent? (Different wavelengths or frequencies of light. ...
... Print enough color copies of the stellar spectra sheet so that you have one for every 2-4 students. Cut them apart and shuffle them out of order. Invite the students to discuss the spectrum—what do the different colors of light in a spectrum represent? (Different wavelengths or frequencies of light. ...
Mass segregation in star clusters is not energy equipartition
... shows behaviour typical of the full suite of simulations. As in Allison et al. (2010); Parker et al. (2014) dynamical mass segregation occurs early in the simulation, but ejections of the most massive stars cause the signal to decay, before the ejected massive stars move beyond the cluster limits an ...
... shows behaviour typical of the full suite of simulations. As in Allison et al. (2010); Parker et al. (2014) dynamical mass segregation occurs early in the simulation, but ejections of the most massive stars cause the signal to decay, before the ejected massive stars move beyond the cluster limits an ...
Star Cycle Balloons - Communicating Astronomy With The Public
... Blow up a little more. Outer envelope dissolves (slowly let out air). Use scissors to cut balloon into pieces, keep inside ball and remnants. You have become a white dwarf surrounded by a planetary nebula. ...
... Blow up a little more. Outer envelope dissolves (slowly let out air). Use scissors to cut balloon into pieces, keep inside ball and remnants. You have become a white dwarf surrounded by a planetary nebula. ...
Life Cycle of Stars Activity
... Blow up a little more. Outer envelope dissolves (slowly let out air). Use scissors to cut balloon into pieces, keep inside ball and remnants. You have become a white dwarf surrounded by a planetary nebula. ...
... Blow up a little more. Outer envelope dissolves (slowly let out air). Use scissors to cut balloon into pieces, keep inside ball and remnants. You have become a white dwarf surrounded by a planetary nebula. ...
gravitational force
... could just be orbiting about a star that is too faint to be seen, but there is an equal chance that a black hole could be present (Hewitt 187). ...
... could just be orbiting about a star that is too faint to be seen, but there is an equal chance that a black hole could be present (Hewitt 187). ...
Stars and the Milky Way
... • It is called the Milky Way because when astronomers looked up at the sky, they saw a line of light that looked like some milk had been spilt. • Stars in our Milky Way can be white, yellow or red. White stars are the hottest and red are the coolest. • It takes light over 100,000 years to travel fro ...
... • It is called the Milky Way because when astronomers looked up at the sky, they saw a line of light that looked like some milk had been spilt. • Stars in our Milky Way can be white, yellow or red. White stars are the hottest and red are the coolest. • It takes light over 100,000 years to travel fro ...
Exercise 4
... Exercise 4 (Stars and the universe) Suggested answers 1. (a) The star is nearly a blackbody, the spectrum of a star can be approximated as a blackbody radiation curve. On the curve, there is a peak which shifts to shorter wavelength when the temperature of the blackbody increases. From the position ...
... Exercise 4 (Stars and the universe) Suggested answers 1. (a) The star is nearly a blackbody, the spectrum of a star can be approximated as a blackbody radiation curve. On the curve, there is a peak which shifts to shorter wavelength when the temperature of the blackbody increases. From the position ...
PH607lec11-4gal2
... the star formation histories of dwarf galaxies Dwarf ellipticals are generally old (stars formed > 10 Gyr old), but some may have had more recent (a few Gyr ago) weaker episodes of star formation Dwarf irregulars tend to have quasi-continuous star formation (perhaps interspersed with bursts). Lower ...
... the star formation histories of dwarf galaxies Dwarf ellipticals are generally old (stars formed > 10 Gyr old), but some may have had more recent (a few Gyr ago) weaker episodes of star formation Dwarf irregulars tend to have quasi-continuous star formation (perhaps interspersed with bursts). Lower ...
proposed october viewing list
... OBJECT DESCRIPTIONS M11 Known as the Wild Duck cluster, this open cluster in the constellation Scutum, (SKEW-tum) is seen best with the 4” refractor at low magnification. It contains more than 2900 stars and is estimated to be about 250 million years old. M11 is receding from us at a speed of 27 km ...
... OBJECT DESCRIPTIONS M11 Known as the Wild Duck cluster, this open cluster in the constellation Scutum, (SKEW-tum) is seen best with the 4” refractor at low magnification. It contains more than 2900 stars and is estimated to be about 250 million years old. M11 is receding from us at a speed of 27 km ...
Brown et al. 2008 Studying Resolved Stellar
... Being the oldest known stellar aggregates, accurately age-dating globular clusters can potentially answer two additional intriguing questions: a) did they form before or after cosmic re-ionization, and in case what part did they play in it? And, b) otherwise, did they form at the time of the formati ...
... Being the oldest known stellar aggregates, accurately age-dating globular clusters can potentially answer two additional intriguing questions: a) did they form before or after cosmic re-ionization, and in case what part did they play in it? And, b) otherwise, did they form at the time of the formati ...
Spectra PowerPoint
... Three types of Spectra Continuous: from glowing solids or very compressed gases, such as the photosphere of the Sun Emission: from hot, glowing gases that are rarefied (not very compressed, such as an emission nebula or features in the solar atmosphere Absorption: a combination spectrum produced b ...
... Three types of Spectra Continuous: from glowing solids or very compressed gases, such as the photosphere of the Sun Emission: from hot, glowing gases that are rarefied (not very compressed, such as an emission nebula or features in the solar atmosphere Absorption: a combination spectrum produced b ...
Birth, Age and the Future of the Universe
... star shine. In the case of the Sun this energy is also the basis of all life. Low-mass stars die as so-called White Dwarfs (Figure 7) when they have converted all their hydrogen into helium. More massive stars can then take regress to “burning” helium to carbon, oxygen and other more complex element ...
... star shine. In the case of the Sun this energy is also the basis of all life. Low-mass stars die as so-called White Dwarfs (Figure 7) when they have converted all their hydrogen into helium. More massive stars can then take regress to “burning” helium to carbon, oxygen and other more complex element ...
Star formation
Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as ""stellar nurseries"" or ""star-forming regions"", collapse to form stars. As a branch of astronomy, star formation includes the study of the interstellar medium (ISM) and giant molecular clouds (GMC) as precursors to the star formation process, and the study of protostars and young stellar objects as its immediate products. It is closely related to planet formation, another branch of astronomy. Star formation theory, as well as accounting for the formation of a single star, must also account for the statistics of binary stars and the initial mass function.In June 2015, astronomers reported evidence for Population III stars in the Cosmos Redshift 7 galaxy at z = 6.60. Such stars are likely to have existed in the very early universe (i.e., at high redshift), and may have started the production of chemical elements heavier than hydrogen that are needed for the later formation of planets and life as we know it.