The Milky Way - Chandra X
... illuminated by brilliant clusters of young stars. These clouds and star clusters are part of the Orion spiral arm. As we move further out, fifty thousand light years from the Sun, other spiral arms of the Galaxy come into view along with the central bulge, where the Galaxy's supermassive black hole ...
... illuminated by brilliant clusters of young stars. These clouds and star clusters are part of the Orion spiral arm. As we move further out, fifty thousand light years from the Sun, other spiral arms of the Galaxy come into view along with the central bulge, where the Galaxy's supermassive black hole ...
The Milky Way - Chandra X
... illuminated by brilliant clusters of young stars. These clouds and star clusters are part of the Orion spiral arm. As we move further out, fifty thousand light years from the Sun, other spiral arms of the Galaxy come into view along with the central bulge, where the Galaxy's supermassive black hole ...
... illuminated by brilliant clusters of young stars. These clouds and star clusters are part of the Orion spiral arm. As we move further out, fifty thousand light years from the Sun, other spiral arms of the Galaxy come into view along with the central bulge, where the Galaxy's supermassive black hole ...
eta carinae – nature`s own hadron collider
... ETA CARINAE IS ONE OF THE MOST MASSIVE STARS KNOWN. IT IS AROUND 100 SOLAR MASSES. THE UPPER LIMIT OF STAR SIZE IS THOUGHT TO BE AROUND 150 SOLAR MASSES. BECAUSE OF ITS SIZE, AND THE HIGH ENERGIES PRODUCED BECAUSE OF GRAVITY, IT IS UNSTABLE. ...
... ETA CARINAE IS ONE OF THE MOST MASSIVE STARS KNOWN. IT IS AROUND 100 SOLAR MASSES. THE UPPER LIMIT OF STAR SIZE IS THOUGHT TO BE AROUND 150 SOLAR MASSES. BECAUSE OF ITS SIZE, AND THE HIGH ENERGIES PRODUCED BECAUSE OF GRAVITY, IT IS UNSTABLE. ...
Untitled
... ultra-violet light from a cluster of very hot stars at centre of the nebula. The cloud is about 800 light years across. It is easily seen in binoculars and can be seen by eye on moonless nights. This nebula is one of the brightest known. If it was as close as the Orion nebula (in The Pot's handle) t ...
... ultra-violet light from a cluster of very hot stars at centre of the nebula. The cloud is about 800 light years across. It is easily seen in binoculars and can be seen by eye on moonless nights. This nebula is one of the brightest known. If it was as close as the Orion nebula (in The Pot's handle) t ...
Stars - TeacherWeb
... If the remaining mass of the star is more than about three times that of the Sun, it will collapse so completely that it will literally disappear from the universe. What is left behind is an intense region of gravity called a black hole ...
... If the remaining mass of the star is more than about three times that of the Sun, it will collapse so completely that it will literally disappear from the universe. What is left behind is an intense region of gravity called a black hole ...
A star is born: understanding the physics of star formation
... surrounding medium. Much of the gas that accretes onto the protostar does so through a disk, and planets can form during the late stages of this process. However, not all of these molecular clouds end up forming new stars, and not all the mass in a star-forming cloud goes into stars. What determines ...
... surrounding medium. Much of the gas that accretes onto the protostar does so through a disk, and planets can form during the late stages of this process. However, not all of these molecular clouds end up forming new stars, and not all the mass in a star-forming cloud goes into stars. What determines ...
What is a galaxy?
... II stars. They are almost entirely hydrogen and helium with few heavier elements, because the matter in them had not previously been in another star. They lie in all parts of the galaxy, the halo (globular clusters), disk, and bulge. Younger stars, formed from matter in the disk of the galaxy, are c ...
... II stars. They are almost entirely hydrogen and helium with few heavier elements, because the matter in them had not previously been in another star. They lie in all parts of the galaxy, the halo (globular clusters), disk, and bulge. Younger stars, formed from matter in the disk of the galaxy, are c ...
Universe Notes - Solon City Schools
... a. Red shift, and cosmic background radiation b. Cosmic background radiation: steady, but very dim signals in the form of microwaves that are emitted all over the sky i. Scientists believe that these microwaves are the remains of the radiation produced during the Big Bang ...
... a. Red shift, and cosmic background radiation b. Cosmic background radiation: steady, but very dim signals in the form of microwaves that are emitted all over the sky i. Scientists believe that these microwaves are the remains of the radiation produced during the Big Bang ...
Stars - Moodle
... • Notice that I did not say __________ • Stars emit all ______________________ of the EM spectrum Analyzing Starlight ...
... • Notice that I did not say __________ • Stars emit all ______________________ of the EM spectrum Analyzing Starlight ...
The Milky Way II AST 112
... – Matter is altered and returned to the ISM throughout the star’s life and when it dies – This is called the Star-Gas-Star Cycle ...
... – Matter is altered and returned to the ISM throughout the star’s life and when it dies – This is called the Star-Gas-Star Cycle ...
Astronomy Review revised Key
... 23. If the star is located 4.3 light years away, how long will it be before we see the light of the star? 4.4 years. 18. What is the Big Bang Theory? The theory that all matter was once condensed into a single point called the singularity, and that singularity exploded sending matter out in all dir ...
... 23. If the star is located 4.3 light years away, how long will it be before we see the light of the star? 4.4 years. 18. What is the Big Bang Theory? The theory that all matter was once condensed into a single point called the singularity, and that singularity exploded sending matter out in all dir ...
Black Hole
... Black Hole - a theoretical massive object, formed at the beginning of the universe or by the gravitational collapse of a star exploding as a supernova, whose gravitational field is so intense that no electromagnetic radiation can escape. ...
... Black Hole - a theoretical massive object, formed at the beginning of the universe or by the gravitational collapse of a star exploding as a supernova, whose gravitational field is so intense that no electromagnetic radiation can escape. ...
The Sun
... About the size of the Earth R~5000km Mass Typically 0.8M Luminosity ~ .001 L Thin layer of “normal” H ...
... About the size of the Earth R~5000km Mass Typically 0.8M Luminosity ~ .001 L Thin layer of “normal” H ...
chapter-30-pp
... Red stars are the coolest and the average surface temperatures are 3,000 degrees C. ...
... Red stars are the coolest and the average surface temperatures are 3,000 degrees C. ...
Practice Questions for Final
... Which of the following does NOT support the theory that active galactic nuclei are powered by accretion disks around massive black holes? A. Spectral lines from the galactic center indicate that clouds of gas are orbiting a central object at very high speed. B. The total amount of radiation coming f ...
... Which of the following does NOT support the theory that active galactic nuclei are powered by accretion disks around massive black holes? A. Spectral lines from the galactic center indicate that clouds of gas are orbiting a central object at very high speed. B. The total amount of radiation coming f ...
Lecture 24, PPT version
... • Evidence for dark matter from galaxies and clusters of galaxies • WIMPs as the favorite theory of dark matter • White dwarf supernovae in distant galaxies as evidence of dark energy and an acceleration of the expansion of the universe ...
... • Evidence for dark matter from galaxies and clusters of galaxies • WIMPs as the favorite theory of dark matter • White dwarf supernovae in distant galaxies as evidence of dark energy and an acceleration of the expansion of the universe ...
Stars
... ______ 8. The colors that appear when a chemical element emits light are called a. continuous lines. b. absorption lines. c. color lines. d. emission lines. ______ 9. Each element in a hot gas can be identified by a. a unique set of bright emission lines. b. a unique set of bright absorption lines. ...
... ______ 8. The colors that appear when a chemical element emits light are called a. continuous lines. b. absorption lines. c. color lines. d. emission lines. ______ 9. Each element in a hot gas can be identified by a. a unique set of bright emission lines. b. a unique set of bright absorption lines. ...
answers - Salem State University
... 13. A white dwarf will not have exhausted its potential carbon fuel, but there is not sufficient gravity to compress its carbon nuclei and electrons further. So there will be emission but not sufficient to be a very luminous star given its size (slight bigger than our Sun). 14. A nova is fusion on t ...
... 13. A white dwarf will not have exhausted its potential carbon fuel, but there is not sufficient gravity to compress its carbon nuclei and electrons further. So there will be emission but not sufficient to be a very luminous star given its size (slight bigger than our Sun). 14. A nova is fusion on t ...
UV-Optical Colors as Probes of Early-Type Galaxy Evolution
... the slope and scatter in the optical ...
... the slope and scatter in the optical ...
Galaxies 1) What are galaxies? 2) The birth of galaxies 3
... Most galaxies are between 3,000 and 400,000 light years in diameter and can contain billions or trillions of stars. The Milky Way, our galaxy, is thought to be between 100,000 and 200,000 light years in diameter and contain between 100 and 400 billion stars, the most ancient of which are 13.7 billio ...
... Most galaxies are between 3,000 and 400,000 light years in diameter and can contain billions or trillions of stars. The Milky Way, our galaxy, is thought to be between 100,000 and 200,000 light years in diameter and contain between 100 and 400 billion stars, the most ancient of which are 13.7 billio ...
U7 Review WS KEY
... b. because every chemical element has a characteristic spectrum c. because chemical elements do not have characteristic spectra d. because colors and lines in the spectrum of stars are all the same How bright a star appears as seen from Earth is called _absolute magnitude_ . Astronomers use _lig ...
... b. because every chemical element has a characteristic spectrum c. because chemical elements do not have characteristic spectra d. because colors and lines in the spectrum of stars are all the same How bright a star appears as seen from Earth is called _absolute magnitude_ . Astronomers use _lig ...
H II region
An H II region is a large, low-density cloud of partially ionized gas in which star formation has recently taken place. The short-lived blue stars forged in these regions emit copious amounts of ultraviolet light that ionize the surrounding gas. H II regions—sometimes several hundred light-years across—are often associated with giant molecular clouds. The first known H II region was the Orion Nebula, which was discovered in 1610 by Nicolas-Claude Fabri de Peiresc.H II regions are named for the large amount of ionised atomic hydrogen they contain, referred to as H II, pronounced H-two by astronomers (an H I region being neutral atomic hydrogen, and H2 being molecular hydrogen). Such regions have extremely diverse shapes, because the distribution of the stars and gas inside them is irregular. They often appear clumpy and filamentary, sometimes showing bizarre shapes such as the Horsehead Nebula. H II regions may give birth to thousands of stars over a period of several million years. In the end, supernova explosions and strong stellar winds from the most massive stars in the resulting star cluster will disperse the gases of the H II region, leaving behind a cluster of birthed stars such as the Pleiades.H II regions can be seen to considerable distances in the universe, and the study of extragalactic H II regions is important in determining the distance and chemical composition of other galaxies. Spiral and irregular galaxies contain many H II regions, while elliptical galaxies are almost devoid of them. In the spiral galaxies, including the Milky Way, H II regions are concentrated in the spiral arms, while in the irregular galaxies they are distributed chaotically. Some galaxies contain huge H II regions, which may contain tens of thousands of stars. Examples include the 30 Doradus region in the Large Magellanic Cloud and NGC 604 in the Triangulum Galaxy.