Observers` Forum - British Astronomical Association
... which is impacting on the local medium. At the points of impact the bow shock generates Herbig−Haro (HH) objects as pairs on either side of the star. In the case of PV Cep three major pairs are clearly seen, with other knots of material present. There is circumstantial evidence that PV Cep is moving ...
... which is impacting on the local medium. At the points of impact the bow shock generates Herbig−Haro (HH) objects as pairs on either side of the star. In the case of PV Cep three major pairs are clearly seen, with other knots of material present. There is circumstantial evidence that PV Cep is moving ...
December 2015
... of Orion lies NGC 2264, the Christmas Tree Cluster. Discovered by William Herschel around Christmas Eve in 1783. Its starry evergreen tree shape was later given an official chart name by L.S. Copeland. In addition to the open cluster there are surrounding patches of glowing gas and dust that form an ...
... of Orion lies NGC 2264, the Christmas Tree Cluster. Discovered by William Herschel around Christmas Eve in 1783. Its starry evergreen tree shape was later given an official chart name by L.S. Copeland. In addition to the open cluster there are surrounding patches of glowing gas and dust that form an ...
Description of Pictures In the Dome
... Centaurus A (also known as NGC 5128) is a lenticular galaxy about 11 million light-years away in the constellation Centaurus. It is one of the closest radio galaxies to Earth, so its active galactic nucleus has been extensively studied by professional astronomers. The galaxy is also the fifth bright ...
... Centaurus A (also known as NGC 5128) is a lenticular galaxy about 11 million light-years away in the constellation Centaurus. It is one of the closest radio galaxies to Earth, so its active galactic nucleus has been extensively studied by professional astronomers. The galaxy is also the fifth bright ...
life and death of a high mass star 2
... AFTER THAT, THEY LOSE THEIR MASS AND HEAT AND BEGIN TO DIE. THIS PROCESS TAKES BILLIONS AND BILLIONS OF YEARS. ...
... AFTER THAT, THEY LOSE THEIR MASS AND HEAT AND BEGIN TO DIE. THIS PROCESS TAKES BILLIONS AND BILLIONS OF YEARS. ...
August
... M13 At a distance of 25,100 light years, this globular cluster in the constellation Hercules (HER-cueleez) is about 145 light years in diameter. The age of M13 has been estimated at over 10 billion years. It contains over 300,000 stars. At the center, stars are about 500 times more concentrated than ...
... M13 At a distance of 25,100 light years, this globular cluster in the constellation Hercules (HER-cueleez) is about 145 light years in diameter. The age of M13 has been estimated at over 10 billion years. It contains over 300,000 stars. At the center, stars are about 500 times more concentrated than ...
NASA Space Place
... times as great as our own star. The Bubble Nebula, discovered in 1787 by William Herschel, is perhaps the classic example of this phenomenon. At a distance of 7,100 light years away in the constellation of Cassiopeia, a molecular gas cloud is actively forming stars, including the massive Oclass star ...
... times as great as our own star. The Bubble Nebula, discovered in 1787 by William Herschel, is perhaps the classic example of this phenomenon. At a distance of 7,100 light years away in the constellation of Cassiopeia, a molecular gas cloud is actively forming stars, including the massive Oclass star ...
Star Formation/Llfe Cycle Notes
... d. Center of protostar gets dense enough and therefore hot enough (3000K+) to become luminous, however not visible due to exterior of gas and dust surrounding it. 3) Phophids- YSO’s starting to disk a. start to get charged particles 4) Early star- Does a stutter step with nuclear fusion which blows ...
... d. Center of protostar gets dense enough and therefore hot enough (3000K+) to become luminous, however not visible due to exterior of gas and dust surrounding it. 3) Phophids- YSO’s starting to disk a. start to get charged particles 4) Early star- Does a stutter step with nuclear fusion which blows ...
Death of Low Mass Stars 8 Solar Masses or less
... ... but they are cooling. Their interior nuclear fires no longer burn, so they will continue to cool until they fade away. The white dwarfs are circled. ...
... ... but they are cooling. Their interior nuclear fires no longer burn, so they will continue to cool until they fade away. The white dwarfs are circled. ...
Comet Pan-Starrs 12 March 2013
... • Supernovae create elements up to Fe via nuclear fusion • The high flux of neutrons builds up n-rich isotopes of all elements (the r-process) • n-rich isotopes decay by βdecay to create stable ...
... • Supernovae create elements up to Fe via nuclear fusion • The high flux of neutrons builds up n-rich isotopes of all elements (the r-process) • n-rich isotopes decay by βdecay to create stable ...
IOSR Journal of Applied Physics (IOSR-JAP) ISSN: 2278-4861.
... which expanded rapidly. This rapid expansion caused the young Universe to cool and resulted in its present continuously expanding state. According to the most recent measurements and observations, this original state existed approximately 13.7 billion years ago, which is considered the age of the Un ...
... which expanded rapidly. This rapid expansion caused the young Universe to cool and resulted in its present continuously expanding state. According to the most recent measurements and observations, this original state existed approximately 13.7 billion years ago, which is considered the age of the Un ...
molecular clouds
... Molecular Clouds In these nebulae much of the hydrogen is in the molecular (H2) form, so these nebulae are called molecular clouds. The largest such formations are called giant molecular clouds (GMC). ...
... Molecular Clouds In these nebulae much of the hydrogen is in the molecular (H2) form, so these nebulae are called molecular clouds. The largest such formations are called giant molecular clouds (GMC). ...
PHYS-633: Problem set #2
... volume/solid angle) within a spherical shell whose thickness ∆R is 10% of its radius R. (Assume there is no absorption opacity, and the the center of the shell is hollow and so emits no radiation.) a. Using the fact that the thickness ∆R R, derive an approximate expression for the total luminosity ...
... volume/solid angle) within a spherical shell whose thickness ∆R is 10% of its radius R. (Assume there is no absorption opacity, and the the center of the shell is hollow and so emits no radiation.) a. Using the fact that the thickness ∆R R, derive an approximate expression for the total luminosity ...
02-Voyage to the Planets
... Our solar system was part of a nebula that consisted mainly of hydrogen and helium Nebula - cloud in outer space, comprised of gas and dust ...
... Our solar system was part of a nebula that consisted mainly of hydrogen and helium Nebula - cloud in outer space, comprised of gas and dust ...
PowerPoint - Chandra X
... Chandra’s image of NGC 7027 represents the first detection of X-rays from this young planetary nebula that is about 700 years old. A bubble of 3 million degree Celsius gas with a length about a hundred times that of our solar system is shown in the image. The image is brighter to the upper right -- ...
... Chandra’s image of NGC 7027 represents the first detection of X-rays from this young planetary nebula that is about 700 years old. A bubble of 3 million degree Celsius gas with a length about a hundred times that of our solar system is shown in the image. The image is brighter to the upper right -- ...
Codes of Life
... start to use helium as a fuel producing carbon. It also begins burning hydrogen in its atmosphere and will expand 100 times to become the red giant • When this happens to our Sun (in about 4 billion years) all inner planets and the Earth will be incinerated. ...
... start to use helium as a fuel producing carbon. It also begins burning hydrogen in its atmosphere and will expand 100 times to become the red giant • When this happens to our Sun (in about 4 billion years) all inner planets and the Earth will be incinerated. ...
Blowing Bubbles in Space: The Birth and Death of Practically
... also applied this model to Mz3:“The smaller bubbles protruding from the shock were not understood until recently; these remarkable features are due to an inward deflection of the highly supersonic gas that bounces off the inner walls of the nebula, causing a double vortex that moves outward with gre ...
... also applied this model to Mz3:“The smaller bubbles protruding from the shock were not understood until recently; these remarkable features are due to an inward deflection of the highly supersonic gas that bounces off the inner walls of the nebula, causing a double vortex that moves outward with gre ...
The Lifecycle of Stars
... When A Star Dies Supernova Some massive stars may explode in a large, bright display called a Supernova Supernova occur when a massive star collapses and throws its outer layers into space. This explosion is so powerful that it can be brighter than an entire galaxy for several days!! ...
... When A Star Dies Supernova Some massive stars may explode in a large, bright display called a Supernova Supernova occur when a massive star collapses and throws its outer layers into space. This explosion is so powerful that it can be brighter than an entire galaxy for several days!! ...
Yes, we are all star dust. Even Gary!
... At temperatures exceeding 10^8 K, helium nuclei will fuse to form carbon: Subsequently, carbon and helium react to form oxygen: ...
... At temperatures exceeding 10^8 K, helium nuclei will fuse to form carbon: Subsequently, carbon and helium react to form oxygen: ...
FSA school wide Science Olympiad 12/8/2007
... hence occulted by the moon at some time or the other. D. All of them lie in the Milky Way band of the sky (the galactic equator) 3. On July 4, 1054, Chinese astronomers (and possibly Native Americans) recorded a supernova explosion taking place in the constellation Taurusso bright that it was even v ...
... hence occulted by the moon at some time or the other. D. All of them lie in the Milky Way band of the sky (the galactic equator) 3. On July 4, 1054, Chinese astronomers (and possibly Native Americans) recorded a supernova explosion taking place in the constellation Taurusso bright that it was even v ...
Chapter 5 Mid-term Study Guide
... Part A 1–8. Number the steps to show the sequence of a star’s life. Write the correct number on the line before each step. ______ A small star becomes a white dwarf, and a large star becomes a neutron star or black hole. ______ The star collapses again and then explodes as a nova or supernova. _____ ...
... Part A 1–8. Number the steps to show the sequence of a star’s life. Write the correct number on the line before each step. ______ A small star becomes a white dwarf, and a large star becomes a neutron star or black hole. ______ The star collapses again and then explodes as a nova or supernova. _____ ...
The Lives of Stars
... The increased oudlow of energy will push out the outer layers, which will cool and become red. The sun will become a “Red Giant”. ...
... The increased oudlow of energy will push out the outer layers, which will cool and become red. The sun will become a “Red Giant”. ...
SNC1PL The Life Cycle of Stars
... Small sized stars also convert most of their hydrogen fuel to helium at some point in their life. • Since small stars don’t have as much mass, they do not produce the conditions to reignite nuclear fusion. • The hot core remains and the outer layers simply drift away • When the white dwarf star cool ...
... Small sized stars also convert most of their hydrogen fuel to helium at some point in their life. • Since small stars don’t have as much mass, they do not produce the conditions to reignite nuclear fusion. • The hot core remains and the outer layers simply drift away • When the white dwarf star cool ...
Crab Nebula
The Crab Nebula (catalogue designations M1, NGC 1952, Taurus A) is a supernova remnant and pulsar wind nebula in the constellation of Taurus. It is not, as its name might suggest, in Cancer. The now-current name is due to William Parsons, 3rd Earl of Rosse, who observed the object in 1840 using a 36-inch telescope and produced a drawing that looked somewhat like a crab. Corresponding to a bright supernova recorded by Chinese astronomers in 1054, the nebula was observed later by English astronomer John Bevis in 1731. The nebula was the first astronomical object identified with a historical supernova explosion.At an apparent magnitude of 8.4, comparable to that of Saturn's moon Titan, it is not visible to the naked eye but can be made out using binoculars under favourable conditions. The nebula lies in the Perseus Arm of the Milky Way galaxy, at a distance of about 2.0 kiloparsecs (6,500 ly) from Earth. It has a diameter of 3.4 parsecs (11 ly), corresponding to an apparent diameter of some 7 arcminutes, and is expanding at a rate of about 1,500 kilometres per second (930 mi/s), or 0.5% c.At the center of the nebula lies the Crab Pulsar, a neutron star 28–30 kilometres (17–19 mi) across with a spin rate of 30.2 times per second, which emits pulses of radiation from gamma rays to radio waves. At X-ray and gamma ray energies above 30 keV, the Crab is generally the strongest persistent source in the sky, with measured flux extending to above 10 TeV. The nebula's radiation allows for the detailed studying of celestial bodies that occult it. In the 1950s and 1960s, the Sun's corona was mapped from observations of the Crab's radio waves passing through it, and in 2003, the thickness of the atmosphere of Saturn's moon Titan was measured as it blocked out X-rays from the nebula.