Where Stars Are Born
... 7. i) Collision between clouds. ii) Compression of a cloud by a nearby emission nebula (due to expansion of the hot nebular gas). iii) Compression of a cloud by a nearby supernova explosion (which seems to have been the trigger that initiated the Sun's formation 5 billion years ago). iv) Galactic de ...
... 7. i) Collision between clouds. ii) Compression of a cloud by a nearby emission nebula (due to expansion of the hot nebular gas). iii) Compression of a cloud by a nearby supernova explosion (which seems to have been the trigger that initiated the Sun's formation 5 billion years ago). iv) Galactic de ...
Integrative Studies 410 Our Place in the Universe
... • Two types of Cepheids: – Type I: higher luminosity, metal-rich, Pop. 1 – Type II: lower lum., metal-poor, Population 2 ...
... • Two types of Cepheids: – Type I: higher luminosity, metal-rich, Pop. 1 – Type II: lower lum., metal-poor, Population 2 ...
AST 207 Final Exam 14 December 2009
... a. (2 pts.) Explain why the sun moves with respect to the stars. b. (2 pts.) Explain why the planets sometimes moves east to west with respect to the stars, which is opposite the way the sun moves. c. (2 pts.) Explain why Mars moves east to west with respect to the horizon. d. (3 pts.) Copernicus’s ...
... a. (2 pts.) Explain why the sun moves with respect to the stars. b. (2 pts.) Explain why the planets sometimes moves east to west with respect to the stars, which is opposite the way the sun moves. c. (2 pts.) Explain why Mars moves east to west with respect to the horizon. d. (3 pts.) Copernicus’s ...
vuorinen_neutron_stars
... 2. but not impossible if you systematically use 1st principles results at low and high density 3. Discovering massive stars places strong constraints on nuclear matter EoS due to tension with soft pQCD pressure 4. pQCD constraint useful even if no quark matter present in stars ...
... 2. but not impossible if you systematically use 1st principles results at low and high density 3. Discovering massive stars places strong constraints on nuclear matter EoS due to tension with soft pQCD pressure 4. pQCD constraint useful even if no quark matter present in stars ...
F03HW12
... one solar mass giant. This presents a paradox because massive stars evolve faster than low mass stars, so the five solar mass stars should leave the main sequence before the one solar mass star. The solution to this paradox is mass transfer. Suppose that the system was originally composed of a five ...
... one solar mass giant. This presents a paradox because massive stars evolve faster than low mass stars, so the five solar mass stars should leave the main sequence before the one solar mass star. The solution to this paradox is mass transfer. Suppose that the system was originally composed of a five ...
Massive star formation in 100000 years from turbulent and
... the star formation rate. The individual star formation time, t∗f , determines the accretion rate of the star; the value of the former quantity is currently uncertain by many orders of magnitude1,2,3,4,5,6 , leading to other astrophysical questions. For example, the variation of t∗f with stellar mass ...
... the star formation rate. The individual star formation time, t∗f , determines the accretion rate of the star; the value of the former quantity is currently uncertain by many orders of magnitude1,2,3,4,5,6 , leading to other astrophysical questions. For example, the variation of t∗f with stellar mass ...
Supernovas Neutron Stars and Black Holes
... This Hubble Space Telescope image contains three main features. The outer white area is the core or centre of the galaxy NGC4261. Inside the core there is a brown spiral-shaped accretion disk. It has a mass one hundred thousand times as much as our sun. Because it is rotating we can measure the rad ...
... This Hubble Space Telescope image contains three main features. The outer white area is the core or centre of the galaxy NGC4261. Inside the core there is a brown spiral-shaped accretion disk. It has a mass one hundred thousand times as much as our sun. Because it is rotating we can measure the rad ...
Lecture 4 – Protoplanetary disk structure o Protoplanetary disk
... o How does the central gas pressure vary with r? Know that the surface density is ...
... o How does the central gas pressure vary with r? Know that the surface density is ...
1/2 - Indico
... since then is equal to the ratio of galaxy’s distance and its velocity. Since this ratio is 1/H which is same for all the galaxies, all of them must have been crowded together at the same ancient time. In other words, at some unique time in the past all the matter in the universe was compressed to a ...
... since then is equal to the ratio of galaxy’s distance and its velocity. Since this ratio is 1/H which is same for all the galaxies, all of them must have been crowded together at the same ancient time. In other words, at some unique time in the past all the matter in the universe was compressed to a ...
Astronomy
... • Should have been much fainter when life arose – Solar evolution models predict this – Roughly 25% less solar energy flux on Earth – Would have caused a 7% temperature drop • Corresponds to ~20 degrees celsius colder ...
... • Should have been much fainter when life arose – Solar evolution models predict this – Roughly 25% less solar energy flux on Earth – Would have caused a 7% temperature drop • Corresponds to ~20 degrees celsius colder ...
Document
... • trigger [SN, cloud-cloud, density wave] • cloud fragments and collapses [Jeans mass and radius] ...
... • trigger [SN, cloud-cloud, density wave] • cloud fragments and collapses [Jeans mass and radius] ...
Chapter12 (with interactive links)
... in the expanding outer layers, causing the planetary nebula that we can observe. Planetary nebulae do not last forever – eventually the gas disperses. ...
... in the expanding outer layers, causing the planetary nebula that we can observe. Planetary nebulae do not last forever – eventually the gas disperses. ...
Attitude Determination
... Attitude Sensors 1 - Rate sensors - For initial acquisition modes, where the spin rate of the spacecraft must be controlled to attain a first inertial lock - Coarse Pointing Sensors - Coarse control is carried out using sun sensors, magnetometer Earth sensors, GPS etc. - Fine Pointing Sensors - Fin ...
... Attitude Sensors 1 - Rate sensors - For initial acquisition modes, where the spin rate of the spacecraft must be controlled to attain a first inertial lock - Coarse Pointing Sensors - Coarse control is carried out using sun sensors, magnetometer Earth sensors, GPS etc. - Fine Pointing Sensors - Fin ...
Review (PPT) - Uplift Summit Intl
... the resulting high temperature causes the fusion of nuclei to create elements heavier than carbon. ▪ The giant phase ends with the star having layers of elements with proton numbers that decrease from the core to the outside (much like layers in an onion). ▪ The dense core causes gravitational contr ...
... the resulting high temperature causes the fusion of nuclei to create elements heavier than carbon. ▪ The giant phase ends with the star having layers of elements with proton numbers that decrease from the core to the outside (much like layers in an onion). ▪ The dense core causes gravitational contr ...