Binary star formation
... not close to unity and the system is far away. Most estimates of the binary frequency in star forming regions suggest the number is at least as large as the main sequence - binaries are formed early. ...
... not close to unity and the system is far away. Most estimates of the binary frequency in star forming regions suggest the number is at least as large as the main sequence - binaries are formed early. ...
The Pennsylvanian Period in Alabama: Looking Up Astronomy and
... center. This changes all relative positions and therefore patterns, like constellations, over long periods of time. The second reason we would not see Orion or the Big Dipper as we see them now is the relatively short life times of massive stars. A star like the Sun can shine steadily, and provide ...
... center. This changes all relative positions and therefore patterns, like constellations, over long periods of time. The second reason we would not see Orion or the Big Dipper as we see them now is the relatively short life times of massive stars. A star like the Sun can shine steadily, and provide ...
chapter 2
... A star speckled night sky filled the minds of men with awe, not only in the past but also at present. From the ancient time, man has observed stars and planets appearing in the night sky and he has come up with various theories about them. Accordingly, astronomy can be considered as the oldest scien ...
... A star speckled night sky filled the minds of men with awe, not only in the past but also at present. From the ancient time, man has observed stars and planets appearing in the night sky and he has come up with various theories about them. Accordingly, astronomy can be considered as the oldest scien ...
The Sun - Center for Astrophysics and Space Astronomy
... • How many times more energy is there in an x-ray photon at 100A than the infrared light photons emitted by every living human? (Assuming 10,000nm wavelength of infrared light). • A. Ten times as powerful. • B. A hundred times more powerful. • C. A thousand times more powerful. • D. 1x1012 (a trilli ...
... • How many times more energy is there in an x-ray photon at 100A than the infrared light photons emitted by every living human? (Assuming 10,000nm wavelength of infrared light). • A. Ten times as powerful. • B. A hundred times more powerful. • C. A thousand times more powerful. • D. 1x1012 (a trilli ...
Year 6 Space Newsletter
... away to France. I heard the French man talking to and isolated. At least England is a lot Dwarf. Finally as but thethen star dad it wasn’t very pleasant the dies lion cubit’s called Black Dwarf, sadly. closer to France than Africa. But came back I can tell he hasn’t learned to hunt yet because his r ...
... away to France. I heard the French man talking to and isolated. At least England is a lot Dwarf. Finally as but thethen star dad it wasn’t very pleasant the dies lion cubit’s called Black Dwarf, sadly. closer to France than Africa. But came back I can tell he hasn’t learned to hunt yet because his r ...
The HR Diagram (PowerPoint version)
... They are ~ 2/3 H, ~ 1/3 He, with just a few percent of everything else (at least in the outer parts, which is what the spectrum tells us about) Incidentally, helium was first detected in the solar spectrum (hence its name, from the Greek ‘helios’) before it was found naturally on Earth. ...
... They are ~ 2/3 H, ~ 1/3 He, with just a few percent of everything else (at least in the outer parts, which is what the spectrum tells us about) Incidentally, helium was first detected in the solar spectrum (hence its name, from the Greek ‘helios’) before it was found naturally on Earth. ...
Glossary
... south celestial pole—the point on the celestial sphere directly above Earth’s South Pole. (p. 9) spar—structural support. (p. 330) spectral analysis—the identification of an object based on the spectrum of light that it reflects, absorbs, or emits. (p. 497) spectrograph—an instrument that separates ...
... south celestial pole—the point on the celestial sphere directly above Earth’s South Pole. (p. 9) spar—structural support. (p. 330) spectral analysis—the identification of an object based on the spectrum of light that it reflects, absorbs, or emits. (p. 497) spectrograph—an instrument that separates ...
Review for Midterm Exam 2
... Atom X had energy levels with energies 1 and 10. Atom Y has energy levels with energies 1 and 12. An electron in each atom moves from the upper energy level to the lower energy level. Light emitted from which atom has a longer wavelength? A. Atom X B. Atom Y C. The wavelength is independent of the ...
... Atom X had energy levels with energies 1 and 10. Atom Y has energy levels with energies 1 and 12. An electron in each atom moves from the upper energy level to the lower energy level. Light emitted from which atom has a longer wavelength? A. Atom X B. Atom Y C. The wavelength is independent of the ...
Announcements
... Visible (Balmer) lines of H formed when electron in 2nd level absorbs a photon and jumps up to a higher level, or when an electron in a higher level emits a photon and jumps down to the 2nd level. ...
... Visible (Balmer) lines of H formed when electron in 2nd level absorbs a photon and jumps up to a higher level, or when an electron in a higher level emits a photon and jumps down to the 2nd level. ...
ESA-ESO Working Group on the Galaxy
... •Low surface brightness -> need to go as far down on RGB •Need to follow stream across large area on the sky -> Wide-field, accurate RV, faint magnitudes, multiplex ~ 100 ...
... •Low surface brightness -> need to go as far down on RGB •Need to follow stream across large area on the sky -> Wide-field, accurate RV, faint magnitudes, multiplex ~ 100 ...
Classifying Spectra PDF version - the Home Page for Voyager2
... The spectral classes are specified by the letters O, B, A, F, G, K, M, L, T going hotter to colder. Each letter is subdivided by assigning a number 0 through 9 following the letter and going from hotter to colder. So B0 is colder than O9 and hotter than B1. Obviously not every type is shown. Origina ...
... The spectral classes are specified by the letters O, B, A, F, G, K, M, L, T going hotter to colder. Each letter is subdivided by assigning a number 0 through 9 following the letter and going from hotter to colder. So B0 is colder than O9 and hotter than B1. Obviously not every type is shown. Origina ...
Contents of the Universe
... • Iron core is degenerate • Core grows until it is too heavy to support itself • Core collapses, density increases, normal iron nuclei are converted into neutrons with the emission of neutrinos • Core collapse stops, neutron star is formed • Rest of the star collapses in on the core, but bounces off ...
... • Iron core is degenerate • Core grows until it is too heavy to support itself • Core collapses, density increases, normal iron nuclei are converted into neutrons with the emission of neutrinos • Core collapse stops, neutron star is formed • Rest of the star collapses in on the core, but bounces off ...
Octobers Meeting - Tauranga Astronomical Society
... waves propagate downwards covering large areas, but don't imply impact craters formed. What Really Was It ? Astronomers today accept that this early morning event on June 30th 1908 creating this gigantic explosion, blinding flash, burning and flattening thousands of sq. kms of forest, was either an ...
... waves propagate downwards covering large areas, but don't imply impact craters formed. What Really Was It ? Astronomers today accept that this early morning event on June 30th 1908 creating this gigantic explosion, blinding flash, burning and flattening thousands of sq. kms of forest, was either an ...
White Dwarfs, Neutron Stars, and Black Holes
... can have their energies changed by small amounts. Therefore, the degenerate matter resists compression; it is extremely rigid. It easily conducts both heat and electricity. In contrast to an ordinary gas, its pressure depends only on its density – not on its temperature. The “free” electrons in a me ...
... can have their energies changed by small amounts. Therefore, the degenerate matter resists compression; it is extremely rigid. It easily conducts both heat and electricity. In contrast to an ordinary gas, its pressure depends only on its density – not on its temperature. The “free” electrons in a me ...
Dark Sky Scotland - Constellation Project
... Centauri and even this close neighbour is about four Light Years away! In 1838, Thomas Henderson, Astronomy Royal for Scotland, was one of three scientists who, independently, first measured the distances to nearby stars. This helped to provide a dramatically new appreciation of the scale of the Uni ...
... Centauri and even this close neighbour is about four Light Years away! In 1838, Thomas Henderson, Astronomy Royal for Scotland, was one of three scientists who, independently, first measured the distances to nearby stars. This helped to provide a dramatically new appreciation of the scale of the Uni ...
Friends of the Planetarium Newsletter September
... Engineers opted to stay clear of the smooth-textured "neck" between them, because from there it would be difficult for Philae to remain in constant radio contact with the main spacecraft as it orbits the nucleus. The smaller-lobe site won out in part because cameras have already identified two small ...
... Engineers opted to stay clear of the smooth-textured "neck" between them, because from there it would be difficult for Philae to remain in constant radio contact with the main spacecraft as it orbits the nucleus. The smaller-lobe site won out in part because cameras have already identified two small ...
Galaxies and Stars
... 73. What factor from the choices below determines whether a star will evolve into a white dwarf, a neutron star, or a black hole? A) mass C) percentage of carbon ...
... 73. What factor from the choices below determines whether a star will evolve into a white dwarf, a neutron star, or a black hole? A) mass C) percentage of carbon ...
Galactic astronomy - Sierra College Astronomy Home Page
... 1. The spiral arms sweep through the Galaxy with an orbital period of approximately 500×106 years (about twice the Sun’s orbital period). 2. This compresses the interstellar medium a small amount. 3. The compression of the interstellar medium triggers star ...
... 1. The spiral arms sweep through the Galaxy with an orbital period of approximately 500×106 years (about twice the Sun’s orbital period). 2. This compresses the interstellar medium a small amount. 3. The compression of the interstellar medium triggers star ...
`earthlike` and second the probability that they have suitable climate
... A more careful and complete statistical study was carried out in Publications of the Astronomical Society of the Pacific ...
... A more careful and complete statistical study was carried out in Publications of the Astronomical Society of the Pacific ...
Today: Magnitude Terminology Photometry Applications Reading
... Calibrated Magnitude: physically meaningful brightness of a star calibrated relative to the known flux standard (e.g. Vega); typically obtained by calculating differential magnitude w.r.t. a known standard star. ...
... Calibrated Magnitude: physically meaningful brightness of a star calibrated relative to the known flux standard (e.g. Vega); typically obtained by calculating differential magnitude w.r.t. a known standard star. ...
Distances in space
... How big is an Au? The real name of an Au is an Astronomical unit, a unit of distance, equal to the mean distance of the earth to the sun 149,597,870km.Ther are different ways to measure the distances in space Au's are one of them the other one is light-years. How far is the closest star in light-yea ...
... How big is an Au? The real name of an Au is an Astronomical unit, a unit of distance, equal to the mean distance of the earth to the sun 149,597,870km.Ther are different ways to measure the distances in space Au's are one of them the other one is light-years. How far is the closest star in light-yea ...
Star Magnitude - ScienceEducationatNewPaltz
... are of Greek and Latin origins and Vega, Rigel, Aldebaran are Arabic derivations. In some cases two names are given to a star because some stars are referred to with multiple names. The designation column gives the star's designation by Johann Bayer's letter and John Flamsteed's number. Johann Bayer ...
... are of Greek and Latin origins and Vega, Rigel, Aldebaran are Arabic derivations. In some cases two names are given to a star because some stars are referred to with multiple names. The designation column gives the star's designation by Johann Bayer's letter and John Flamsteed's number. Johann Bayer ...
Corvus (constellation)
Corvus is a small constellation in the Southern Celestial Hemisphere. Its name comes from the Latin word ""raven"" or ""crow"". It includes only 11 stars with brighter than 4.02 magnitudes. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations. The four brightest stars, Gamma, Delta, Epsilon, and Beta Corvi from a distinctive quadrilateral in the night sky. The young star Eta Corvi has been found to have two debris disks.