The Galaxy Presentation 2011
... •Tried to estimate Rayleigh scattering due to ISM gas but determined it to be insignificant (because most obscuration is due to ISM dust absorption which has a smaller dependence) •Shapley (1919) noted that globular clusters are distributed asymmetrically in the sky and that if one assumes they ar ...
... •Tried to estimate Rayleigh scattering due to ISM gas but determined it to be insignificant (because most obscuration is due to ISM dust absorption which has a smaller dependence) •Shapley (1919) noted that globular clusters are distributed asymmetrically in the sky and that if one assumes they ar ...
Investigate Stars and Galaxies - American Museum of Natural History
... Using the information in the diagram and also in the sections on star type you used in the chart in Step 2, record the following information about each star: (Teacher’s Note: Because the HR diagram only designates some temperatures ...
... Using the information in the diagram and also in the sections on star type you used in the chart in Step 2, record the following information about each star: (Teacher’s Note: Because the HR diagram only designates some temperatures ...
February 2010 Vol 21 No 2 - Cape Cod Astronomical Society
... Jon Greenberg, longtime member and former president of CCAS, taught astronomy to newbies at his home for eight years through 2008. (See story in February 2009 First Light, page 7.) Jon’s course was my introduction to him and to CCAS in the spring of 2006. Following that first experience, I, along wi ...
... Jon Greenberg, longtime member and former president of CCAS, taught astronomy to newbies at his home for eight years through 2008. (See story in February 2009 First Light, page 7.) Jon’s course was my introduction to him and to CCAS in the spring of 2006. Following that first experience, I, along wi ...
Neutron Stars
... • All heavy elements are created and dispersed through the galaxy by stars • Without high mass stars, no heavy elements • Our atoms were once parts of stars that died more than 4.6 billion years ago, whose remains were swept up into the solar system when the Sun formed ...
... • All heavy elements are created and dispersed through the galaxy by stars • Without high mass stars, no heavy elements • Our atoms were once parts of stars that died more than 4.6 billion years ago, whose remains were swept up into the solar system when the Sun formed ...
TMSP Stellar Evolution & Life
... complex but similar to a prism). We’ll keep it simple and just deal ...
... complex but similar to a prism). We’ll keep it simple and just deal ...
Astrophysics - Part 2
... night sky is a measure of its brightness which depends on the intensity of the light received from the star. Stars were in ancient times divided into six levels of apparent magnitude. The brightest were called FIRST MAGNITUDE stars, those just visible to the unaided eye in the darkest sky, SIXTH MAG ...
... night sky is a measure of its brightness which depends on the intensity of the light received from the star. Stars were in ancient times divided into six levels of apparent magnitude. The brightest were called FIRST MAGNITUDE stars, those just visible to the unaided eye in the darkest sky, SIXTH MAG ...
Fulltext PDF - Indian Academy of Sciences
... The twinkling diamonds in the night sky make us wonder at their variety - while some are bright, some are faint; some are blue and red. The attempt to understand this vast variety eventually led to the physics of the structure of the stars. The brightness of a star is measured in magnitudes. Hipparc ...
... The twinkling diamonds in the night sky make us wonder at their variety - while some are bright, some are faint; some are blue and red. The attempt to understand this vast variety eventually led to the physics of the structure of the stars. The brightness of a star is measured in magnitudes. Hipparc ...
Star Evolution
... fusion in their cores. They leave the main sequence and become red giants when the core hydrogen is depleted” ...
... fusion in their cores. They leave the main sequence and become red giants when the core hydrogen is depleted” ...
Measuring Distances
... Measuring Distances Hold your finger out in front of your face at arm’s length. Look at your finger through each eye separately. What do you notice? This change in perspective is known as parallax. Ancient Greek astronomers expected to see a similar change in the positions of nearby stars if Earth ...
... Measuring Distances Hold your finger out in front of your face at arm’s length. Look at your finger through each eye separately. What do you notice? This change in perspective is known as parallax. Ancient Greek astronomers expected to see a similar change in the positions of nearby stars if Earth ...
Stars, Galaxies, and the Universe Section 1 Distances to Stars
... • The apparent motion of stars, or motion as it appears from Earth, is caused by the movement of Earth. • The stars seem as though they are moving counterclockwise around a central star called Polaris, the North Star. Polaris is almost directly above the North Pole, and thus the star does not appear ...
... • The apparent motion of stars, or motion as it appears from Earth, is caused by the movement of Earth. • The stars seem as though they are moving counterclockwise around a central star called Polaris, the North Star. Polaris is almost directly above the North Pole, and thus the star does not appear ...
Neutron Stars
... • All heavy elements are created and dispersed through the galaxy by stars • Without high mass stars, no heavy elements • Our atoms were once parts of stars that died more than 4.6 billion years ago, whose remains were swept up into the solar system when the Sun formed ...
... • All heavy elements are created and dispersed through the galaxy by stars • Without high mass stars, no heavy elements • Our atoms were once parts of stars that died more than 4.6 billion years ago, whose remains were swept up into the solar system when the Sun formed ...
Math 111: Logarithm Scales
... where M0 is a very rough estimate of the seismic energy of an earthquake (in dynes-cm). (a) The Kern County earthquake of 1952 released about 2 × 1027 dyne-cm of seismic energy. What was the moment magnitude of the Kern County earthquake? (b) The El Centro earthquake of 1940 had a moment magnitude o ...
... where M0 is a very rough estimate of the seismic energy of an earthquake (in dynes-cm). (a) The Kern County earthquake of 1952 released about 2 × 1027 dyne-cm of seismic energy. What was the moment magnitude of the Kern County earthquake? (b) The El Centro earthquake of 1940 had a moment magnitude o ...
Constellations, Looking Far Away, and Stars/Stellar Evolution
... Read aloud. The graph of how the temperatures and luminosities of stars are related is known as the Hertzsprung-Russell or H-R diagram. From this graph, we can also get an estimate of the size of a star, its radius. Astronomers worked with this graph long before they knew why stars varied in this wa ...
... Read aloud. The graph of how the temperatures and luminosities of stars are related is known as the Hertzsprung-Russell or H-R diagram. From this graph, we can also get an estimate of the size of a star, its radius. Astronomers worked with this graph long before they knew why stars varied in this wa ...
Astronomy_Stellar_Evolution_and_Type_II_Supernovae_Exam
... 12) 200,000 light years away the Small Magellanic Cloud is a ‘little brother’ to our Milky Way. What “super-bubble rich” component of this cloud is particularly useful in the study of Stellar Life Cycles? 13) This Nebula in the Sagittarius arm of our Milky Way Galaxy is actually just one of six brig ...
... 12) 200,000 light years away the Small Magellanic Cloud is a ‘little brother’ to our Milky Way. What “super-bubble rich” component of this cloud is particularly useful in the study of Stellar Life Cycles? 13) This Nebula in the Sagittarius arm of our Milky Way Galaxy is actually just one of six brig ...
THE GALACTIC GAZETTE The Astronomical Society of Southern New England Next Meeting
... Cataclysmics, also known as dwarf novae, are binary stars in close orbit about one another. One of them is Sunlike, the other a compact white dwarf star with an appetite. Their embrace is so tight — 100,000 miles for SS Cygni according to some estimates — that the dwarf's powerful gravity strips mat ...
... Cataclysmics, also known as dwarf novae, are binary stars in close orbit about one another. One of them is Sunlike, the other a compact white dwarf star with an appetite. Their embrace is so tight — 100,000 miles for SS Cygni according to some estimates — that the dwarf's powerful gravity strips mat ...
Summary: Nuclear burning in stars
... • Spiral arms have higher density than space between arms • Excess gravitational attraction slows down gas, stars when they pass through spiral arm in course of their orbits. • Î spiral arms are a traffic jam ...
... • Spiral arms have higher density than space between arms • Excess gravitational attraction slows down gas, stars when they pass through spiral arm in course of their orbits. • Î spiral arms are a traffic jam ...
Practice Questions for Exam 3
... C. The Sun initially began generating energy through nuclear fusion as it formed, but today it generates energy primarily through the sunspot cycle. D. As the Sun was forming, gravitational contraction increased the Sun's temperature until the core become hot enough for nuclear fusion, which ever si ...
... C. The Sun initially began generating energy through nuclear fusion as it formed, but today it generates energy primarily through the sunspot cycle. D. As the Sun was forming, gravitational contraction increased the Sun's temperature until the core become hot enough for nuclear fusion, which ever si ...
PHYSICS – Astrophysics Section I
... Different wavebands (a range of wavelengths) of light have differing properties. One of these properties is absorption by the Earth’s atmosphere. Gamma and x-rays are strongly absorbed by the upper atmosphere, and very little of these wavebands reach the surface of the Earth. Most of the ultraviolet ...
... Different wavebands (a range of wavelengths) of light have differing properties. One of these properties is absorption by the Earth’s atmosphere. Gamma and x-rays are strongly absorbed by the upper atmosphere, and very little of these wavebands reach the surface of the Earth. Most of the ultraviolet ...
Stellar Evolution Review
... a) they don’t emit any radiation b) they are surrounded by clouds of gas and dust c) they only emit infrared radiation d) they are all moving away from Earth so fast that their visible light is Doppler shifted into the infrared ...
... a) they don’t emit any radiation b) they are surrounded by clouds of gas and dust c) they only emit infrared radiation d) they are all moving away from Earth so fast that their visible light is Doppler shifted into the infrared ...
Stars: Their Life and Afterlife
... not only tend to form close together in space, but also in time – and so, for massive stars, they will also die relatively close together in space and time. Superbubbles form from OB associations. OB associations are clusters of massive stars of spectral types – you guessed it – O and B. • O stars a ...
... not only tend to form close together in space, but also in time – and so, for massive stars, they will also die relatively close together in space and time. Superbubbles form from OB associations. OB associations are clusters of massive stars of spectral types – you guessed it – O and B. • O stars a ...
Corona Australis
Corona Australis /kɵˈroʊnə ɒˈstreɪlɨs/ or Corona Austrina /kɵˈroʊnə ɒˈstraɪnə/ is a constellation in the Southern Celestial Hemisphere. Its Latin name means ""southern crown"", and it is the southern counterpart of Corona Borealis, the northern crown. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations. The Ancient Greeks saw Corona Australis as a wreath rather than a crown and associated it with Sagittarius or Centaurus. Other cultures have likened the pattern to a turtle, ostrich nest, a tent, or even a hut belonging to a rock hyrax.Although fainter than its namesake, the oval- or horseshoe-shaped pattern of its brighter stars renders it distinctive. Alpha and Beta Coronae Australis are the two brightest stars with an apparent magnitude of around 4.1. Epsilon Coronae Australis is the brightest example of a W Ursae Majoris variable in the southern sky. Lying alongside the Milky Way, Corona Australis contains one of the closest star-forming regions to our Solar System—a dusty dark nebula known as the Corona Australis Molecular Cloud, lying about 430 light years away. Within it are stars at the earliest stages of their lifespan. The variable stars R and TY Coronae Australis light up parts of the nebula, which varies in brightness accordingly.