Orion-pr-2009 - Astrophysics Research Institute
... where young stars are currently being born. On the sky, the region – known to astronomers as the Orion Molecular Cloud -- is more than 20 times the angular size of the full moon, spanning from far above the hunter’s head to far below his feet. It is one of the most intense regions of star formation ...
... where young stars are currently being born. On the sky, the region – known to astronomers as the Orion Molecular Cloud -- is more than 20 times the angular size of the full moon, spanning from far above the hunter’s head to far below his feet. It is one of the most intense regions of star formation ...
Constellations - Sierra Star Gazers
... has the distinction of being one of the largest and brightest stars in the known galaxy. While too far for a good parallax distance calculation, Mu Cephei is thought to be about 2400 light years away. With a radius 1,650 times larger than our Sun’s, if placed in the center of our solar system the su ...
... has the distinction of being one of the largest and brightest stars in the known galaxy. While too far for a good parallax distance calculation, Mu Cephei is thought to be about 2400 light years away. With a radius 1,650 times larger than our Sun’s, if placed in the center of our solar system the su ...
The Sculptor dwarf irregular galaxy SDIG: present and past
... which has faded significantly since its last burst of star formation might be expected to show an H I mass per unit area which is close to normal, but an H I mass per unit luminosity which is anomalously high. The results above suggest that SDIG has faded by less than a magnitude in B relative to a ...
... which has faded significantly since its last burst of star formation might be expected to show an H I mass per unit area which is close to normal, but an H I mass per unit luminosity which is anomalously high. The results above suggest that SDIG has faded by less than a magnitude in B relative to a ...
Document
... • How do we know the distance to stars and clusters in our galaxy? • Stellar parallax: – Parallax of nearby stars relative to background stars. – Good out to ~500 pc. ...
... • How do we know the distance to stars and clusters in our galaxy? • Stellar parallax: – Parallax of nearby stars relative to background stars. – Good out to ~500 pc. ...
Starry Night¨ Times - October 2008
... Orion Nebula. Although it is 1500 lightyears away, M42 is a great target to view in small telescopes. This is due not only to its brightness, but also to its wonderful cloud structure, which in telescopes takes on a clearly three-dimensional shape. Observers new and old come back to M42 time and tim ...
... Orion Nebula. Although it is 1500 lightyears away, M42 is a great target to view in small telescopes. This is due not only to its brightness, but also to its wonderful cloud structure, which in telescopes takes on a clearly three-dimensional shape. Observers new and old come back to M42 time and tim ...
Star formation and internal kinematics of irregular galaxies
... shorter than the dynamical timescales within a galaxy. And a star with the same initial mass and metallicity will trace the same evolutionary track in the HR diagram, irrespective of the galaxy into which it was born. Nevertheless there must be a size scale where the dynamical environment begins to ...
... shorter than the dynamical timescales within a galaxy. And a star with the same initial mass and metallicity will trace the same evolutionary track in the HR diagram, irrespective of the galaxy into which it was born. Nevertheless there must be a size scale where the dynamical environment begins to ...
Edwin Hubble (1889
... Writing in his doctoral thesis in 1917, Hubble noted that catalogs already included some 17,000 small, faint nebulous objects that could ultimately be resolved into groupings of stars. Perhaps 150,000 were within the reach of existing telescopes. Yet, he wrote, "Extremely little is known of the natu ...
... Writing in his doctoral thesis in 1917, Hubble noted that catalogs already included some 17,000 small, faint nebulous objects that could ultimately be resolved into groupings of stars. Perhaps 150,000 were within the reach of existing telescopes. Yet, he wrote, "Extremely little is known of the natu ...
Characteristics of Our Galaxy
... but it is also to study other galaxies as well. While the study of the Milky Way Galaxy seems like a specific task, to truly explain its past, present, and future, and to truly understand its essence, requires one to address nearly everything but the question of multiple universes. While this is too ...
... but it is also to study other galaxies as well. While the study of the Milky Way Galaxy seems like a specific task, to truly explain its past, present, and future, and to truly understand its essence, requires one to address nearly everything but the question of multiple universes. While this is too ...
PH607lec08
... Cores of Ellipticals • Seeing corrections are important; moreover, it's generally not possible to make corrections without some assumptions about the underlying luminosity distribution • Few E galaxies actually have flat luminosity profiles at small radii; instead, the profiles rise inward to the la ...
... Cores of Ellipticals • Seeing corrections are important; moreover, it's generally not possible to make corrections without some assumptions about the underlying luminosity distribution • Few E galaxies actually have flat luminosity profiles at small radii; instead, the profiles rise inward to the la ...
The Great Debate - The Story Behind The Science
... Shapley could then tack on the implication that nothing existed outside its boundaries, not even island universes. Shapley was inexperienced at the lecture podium but knew that many scientists unfamiliar with astronomy filled the hall. He thus crafted an understandable twenty-page speech to get his ...
... Shapley could then tack on the implication that nothing existed outside its boundaries, not even island universes. Shapley was inexperienced at the lecture podium but knew that many scientists unfamiliar with astronomy filled the hall. He thus crafted an understandable twenty-page speech to get his ...
society journal - Auckland Astronomical Society
... A Message from Earth: Voyager the Golden Record with Jon Lomberg Report by Clive Bolt Jon Lomberg is perhaps the best-known astronomical illustrator in the world. He is well known for his graphic design of the Carl Sagan documentaries and for some of Carl Sagan’s books but perhaps his most famous im ...
... A Message from Earth: Voyager the Golden Record with Jon Lomberg Report by Clive Bolt Jon Lomberg is perhaps the best-known astronomical illustrator in the world. He is well known for his graphic design of the Carl Sagan documentaries and for some of Carl Sagan’s books but perhaps his most famous im ...
Phys 214. Planets and Life
... chemical composition of the Universe. Calculations predict that the composition of the Universe should be about three fourths hydrogen and one fourth helium by mass, being a closed match to the overall chemical composition of the universe. This prediction implies that the universe was born only with ...
... chemical composition of the Universe. Calculations predict that the composition of the Universe should be about three fourths hydrogen and one fourth helium by mass, being a closed match to the overall chemical composition of the universe. This prediction implies that the universe was born only with ...
Name
... 33) Which is not a reason why all large modern telescopes tend to be reflectors? A) It is much easier to make a high-quality mirror than the same quality lens B) Large mirrors are much lighter than large lenses C) Lenses focus different wavelengths of light slightly differently. Mirrors do not have ...
... 33) Which is not a reason why all large modern telescopes tend to be reflectors? A) It is much easier to make a high-quality mirror than the same quality lens B) Large mirrors are much lighter than large lenses C) Lenses focus different wavelengths of light slightly differently. Mirrors do not have ...
Name
... 33) Which is not a reason why all large modern telescopes tend to be reflectors? A) It is much easier to make a high-quality mirror than the same quality lens B) Large mirrors are much lighter than large lenses C) Lenses focus different wavelengths of light slightly differently. Mirrors do not have ...
... 33) Which is not a reason why all large modern telescopes tend to be reflectors? A) It is much easier to make a high-quality mirror than the same quality lens B) Large mirrors are much lighter than large lenses C) Lenses focus different wavelengths of light slightly differently. Mirrors do not have ...
Name
... 33) Which is not a reason why all large modern telescopes tend to be reflectors? A) It is much easier to make a high-quality mirror than the same quality lens B) Large mirrors are much lighter than large lenses C) Lenses focus different wavelengths of light slightly differently. Mirrors do not have ...
... 33) Which is not a reason why all large modern telescopes tend to be reflectors? A) It is much easier to make a high-quality mirror than the same quality lens B) Large mirrors are much lighter than large lenses C) Lenses focus different wavelengths of light slightly differently. Mirrors do not have ...
stargazing - davis.k12.ut.us
... depending on the planet you wanted to visit. Rockets can travel through space at about 75,000 mph or 121,000 kph. If we wanted to visit Venus, our closest planet, we would have to travel about 14.5 days. Pluto, a dwarf planet further than our farthest planet, would take us about 5.5 years to reach. ...
... depending on the planet you wanted to visit. Rockets can travel through space at about 75,000 mph or 121,000 kph. If we wanted to visit Venus, our closest planet, we would have to travel about 14.5 days. Pluto, a dwarf planet further than our farthest planet, would take us about 5.5 years to reach. ...
16 Hubble s Law and Dark Matter
... The end of the quasar epoch seems to have been about 10 billion years ago; all the quasars we have seen are older than that. Why might that be? The black holes powering the quasars do not go away; it is believed that many, if not most, galaxies have a supermassive black hole at their centers. ...
... The end of the quasar epoch seems to have been about 10 billion years ago; all the quasars we have seen are older than that. Why might that be? The black holes powering the quasars do not go away; it is believed that many, if not most, galaxies have a supermassive black hole at their centers. ...
Chapter 40
... • Largest stars have no force strong enough to stop them from contracting • Collapse until they disappear from observable universe…a black hole • Speed of collapse increases until it is faster than the speed of light, therefore we can’t see ...
... • Largest stars have no force strong enough to stop them from contracting • Collapse until they disappear from observable universe…a black hole • Speed of collapse increases until it is faster than the speed of light, therefore we can’t see ...
No Slide Title
... What type of star has the mass of our Sun and the radius of the Earth but it doesn’t emit enough light or other radiation to be easily detected? ...
... What type of star has the mass of our Sun and the radius of the Earth but it doesn’t emit enough light or other radiation to be easily detected? ...
What`s Brewing in the Teapot - Indiana University Astronomy
... Milky Way Specs A spiral galaxy shaped like a disk Diameter ~100,000 light years Thickness ~300 light years The Sun is ~2/3 of the way out from the center to the edge Mass about 200 billion Suns (from the orbits of stars) The Sun orbits the center of the Galaxy ...
... Milky Way Specs A spiral galaxy shaped like a disk Diameter ~100,000 light years Thickness ~300 light years The Sun is ~2/3 of the way out from the center to the edge Mass about 200 billion Suns (from the orbits of stars) The Sun orbits the center of the Galaxy ...
Hubble Deep Field
The Hubble Deep Field (HDF) is an image of a small region in the constellation Ursa Major, constructed from a series of observations by the Hubble Space Telescope. It covers an area 2.5 arcminutes across, about one 24-millionth of the whole sky, which is equivalent in angular size to a 65 mm tennis ball at a distance of 100 metres. The image was assembled from 342 separate exposures taken with the Space Telescope's Wide Field and Planetary Camera 2 over ten consecutive days between December 18 and December 28, 1995.The field is so small that only a few foreground stars in the Milky Way lie within it; thus, almost all of the 3,000 objects in the image are galaxies, some of which are among the youngest and most distant known. By revealing such large numbers of very young galaxies, the HDF has become a landmark image in the study of the early universe, with the associated scientific paper having received over 900 citations by the end of 2014.Three years after the HDF observations were taken, a region in the south celestial hemisphere was imaged in a similar way and named the Hubble Deep Field South. The similarities between the two regions strengthened the belief that the universe is uniform over large scales and that the Earth occupies a typical region in the Universe (the cosmological principle). A wider but shallower survey was also made as part of the Great Observatories Origins Deep Survey. In 2004 a deeper image, known as the Hubble Ultra-Deep Field (HUDF), was constructed from a few months of light exposure. The HUDF image was at the time the most sensitive astronomical image ever made at visible wavelengths, and it remained so until the Hubble Extreme Deep Field (XDF) was released in 2012.