11.3 Measuring Distances in Space
... One light-year is the distance that light will travel in one year. It is 9 500 000 000 000 km or 9.5 trillion km. One light-year is about 63 000 AU. Distances to other stars and galaxies are measured in light-years. ...
... One light-year is the distance that light will travel in one year. It is 9 500 000 000 000 km or 9.5 trillion km. One light-year is about 63 000 AU. Distances to other stars and galaxies are measured in light-years. ...
Outline2a
... scatters light. Dust in space can be seen in silhouette, as it blocks out the light from more distant stars. ...
... scatters light. Dust in space can be seen in silhouette, as it blocks out the light from more distant stars. ...
Galaxies - senwiki
... that nothing, not even light, can escape. -Why? Black holes have extremely strong gravitational pulls. They can pull in stars and accumulate the mass of the stars. -Where are black holes located? Astronomers believe that each galaxy contains at least one supermassive black hole at its centre. ...
... that nothing, not even light, can escape. -Why? Black holes have extremely strong gravitational pulls. They can pull in stars and accumulate the mass of the stars. -Where are black holes located? Astronomers believe that each galaxy contains at least one supermassive black hole at its centre. ...
Final Exam: Chs 4-5, 12-17
... ____ 48. What is the relationship between the mass of a protostar and the time needed for it to reach the main sequence after it forms inside an interstellar cloud? a. The time needed is independent of the mass of the protostar. b. The time needed is least for a protostar of approximately 4 solar m ...
... ____ 48. What is the relationship between the mass of a protostar and the time needed for it to reach the main sequence after it forms inside an interstellar cloud? a. The time needed is independent of the mass of the protostar. b. The time needed is least for a protostar of approximately 4 solar m ...
March 2017 - Shasta Astronomy Club
... where all the objects were in the fields, separated stars from distant background galaxies (stars are point sources, whereas most galaxies are slightly extended), and then looked for places where there were more stars than expected — hoping some might be faint Milky Way satellites. In the constellat ...
... where all the objects were in the fields, separated stars from distant background galaxies (stars are point sources, whereas most galaxies are slightly extended), and then looked for places where there were more stars than expected — hoping some might be faint Milky Way satellites. In the constellat ...
lecture24
... Spiral galaxies have a basic disk shape with the spiral arms in the flat disk. There is a central core containing the bulk of the stars, visible here as bright hubs (99% of the light) from which the spirals radiate. And like the Milky Way, there is a sparsely populated halo of stars. Spirals come wi ...
... Spiral galaxies have a basic disk shape with the spiral arms in the flat disk. There is a central core containing the bulk of the stars, visible here as bright hubs (99% of the light) from which the spirals radiate. And like the Milky Way, there is a sparsely populated halo of stars. Spirals come wi ...
Presentazione di PowerPoint
... same sense in any normal disk having angular speed Ω decreasing outward. Both types of motion occur in a direction opposite to Ω itself It is precisely this agreement that makes it possible for a wide-open pattern of epiciclic vibrations to resonate with the shear flow. The only extra-need is for st ...
... same sense in any normal disk having angular speed Ω decreasing outward. Both types of motion occur in a direction opposite to Ω itself It is precisely this agreement that makes it possible for a wide-open pattern of epiciclic vibrations to resonate with the shear flow. The only extra-need is for st ...
Two Summers in the UCSC Science Internship Program
... to find a young, recently formed star in isolation. This anomalous behavior makes field stars an exciting and hotly debated subject. One theory proposes that field stars do, in fact, form by themselves; another claims that field stars are runaway stars that escaped from their original clusters at hi ...
... to find a young, recently formed star in isolation. This anomalous behavior makes field stars an exciting and hotly debated subject. One theory proposes that field stars do, in fact, form by themselves; another claims that field stars are runaway stars that escaped from their original clusters at hi ...
L2 Star formation Part I
... Note the somewhat counter-intuitive result that in such a contraction, the total energy becomes more negative, while the temperature is increasing. This is a general characteristic of self-gravitating systems. By analogy to normal gases, where u=cvT, self-gravitating systems are said to have a negat ...
... Note the somewhat counter-intuitive result that in such a contraction, the total energy becomes more negative, while the temperature is increasing. This is a general characteristic of self-gravitating systems. By analogy to normal gases, where u=cvT, self-gravitating systems are said to have a negat ...
Friday, April 25 - Otterbein University
... • Conclusion: there are no stars beyond a certain distance ...
... • Conclusion: there are no stars beyond a certain distance ...
4. Massive Stars and HII Regions
... stars via the collapse of a very massive dense cloud; this implies very high mass accretion rates; observationally one should be able to observe massive discs and outflows from those objects; 2) by coalescence of lower mass stars in extremely dense cluster environments; – Observational evidence seem ...
... stars via the collapse of a very massive dense cloud; this implies very high mass accretion rates; observationally one should be able to observe massive discs and outflows from those objects; 2) by coalescence of lower mass stars in extremely dense cluster environments; – Observational evidence seem ...
Earth Science, 10th edition Chapter 23: Beyond Our Solar System I
... a. Weighs 100 million tons b. Same density as an atomic nucleus 5. Strong magnetic field 6. First one discovered in early 1970s a. Pulsar (pulsating radio source) b. Found in the Crab nebula (remnant of an A.D. 1054 supernova) C. Black hole 1. More dense than a neutron star 2. Intense surface gravi ...
... a. Weighs 100 million tons b. Same density as an atomic nucleus 5. Strong magnetic field 6. First one discovered in early 1970s a. Pulsar (pulsating radio source) b. Found in the Crab nebula (remnant of an A.D. 1054 supernova) C. Black hole 1. More dense than a neutron star 2. Intense surface gravi ...
spiral nebulae
... period of just a decade or two, the stars within them would need to be moving very much faster than the speed of light -- which is simply not possible. ...
... period of just a decade or two, the stars within them would need to be moving very much faster than the speed of light -- which is simply not possible. ...
Passport to the Universe Educator`s Guide Text
... galaxies in still larger groups—superclusters throughout the universe. The Observable Universe As the voyage continues to the edge of the known universe, 13 billion light years from Earth, we look back and try to find the Milky Way Galaxy and home. There may be as many as 100 billion galaxies in the ...
... galaxies in still larger groups—superclusters throughout the universe. The Observable Universe As the voyage continues to the edge of the known universe, 13 billion light years from Earth, we look back and try to find the Milky Way Galaxy and home. There may be as many as 100 billion galaxies in the ...
Indroduction
... more recent ones by Kau mann & Charlot (1996), and Kau mann & Charlot (1997) ellipticals are viewed as being formed by mergers of disk galaxies in a universe where structures are built through hierarchical clustering. In the local universe, ongoing merging is observed and it is generally assumed tha ...
... more recent ones by Kau mann & Charlot (1996), and Kau mann & Charlot (1997) ellipticals are viewed as being formed by mergers of disk galaxies in a universe where structures are built through hierarchical clustering. In the local universe, ongoing merging is observed and it is generally assumed tha ...
(Mike Riddle CTI)-84_eng_cr_v4.0
... some special conditions for star formation and also for a long time period. A cloud of hydrogen gas must be compressed to a sufficiently small size so that gravity dominates. continued ...
... some special conditions for star formation and also for a long time period. A cloud of hydrogen gas must be compressed to a sufficiently small size so that gravity dominates. continued ...
The larger the magnetic field, the stronger our ignorance
... bubbles). One set of theorists says that they can produce both axi- and bisymmetric spirals this way (though sometimes with another, unwanted, reversal of field direction across the galactic midplane). Another set periodically says that you get the wrong geometry, all the field energy cascades down ...
... bubbles). One set of theorists says that they can produce both axi- and bisymmetric spirals this way (though sometimes with another, unwanted, reversal of field direction across the galactic midplane). Another set periodically says that you get the wrong geometry, all the field energy cascades down ...
The Galaxies
... with a speed proportional to distance, there must have been a beginning, when everything was concentrated in one single point: ...
... with a speed proportional to distance, there must have been a beginning, when everything was concentrated in one single point: ...
The Superhero's Universe: Observing the Cosmos with X-ray Vision and Beyond
... Galaxy: Centaurus A ★ Discovered in 1847 ★ 14 million light-years away ★ 5th brightest visible galaxy ...
... Galaxy: Centaurus A ★ Discovered in 1847 ★ 14 million light-years away ★ 5th brightest visible galaxy ...
Stellar Spire in the Eagle Nebula
... gas that reside in chaotic neighborhoods, where energy from newborn stars sculpts fantasy-like landscapes in the gas. The tower is a giant incubator for these newborn stars. A torrent of ultraviolet light from a band of massive, hot, young stars [off the top of the image] is eroding the pillar. The ...
... gas that reside in chaotic neighborhoods, where energy from newborn stars sculpts fantasy-like landscapes in the gas. The tower is a giant incubator for these newborn stars. A torrent of ultraviolet light from a band of massive, hot, young stars [off the top of the image] is eroding the pillar. The ...