Comet Pan-Starrs 12 March 2013
... The Debris of Stars • 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 isotope. • All known elements can be made this way. ...
... The Debris of Stars • 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 isotope. • All known elements can be made this way. ...
Test 2, Nov. 17, 2015 - Physics@Brock
... 1. Galileo’s observation of the gibbous and the quarter phases of Venus supported (a) the geocentric model. (b) the heliocentric model. 2. According to Kepler’s second law, a planet moves fastest when it is (a) closest to the Sun. (b) at the greatest distance from the Sun. (c) [The speed of the plan ...
... 1. Galileo’s observation of the gibbous and the quarter phases of Venus supported (a) the geocentric model. (b) the heliocentric model. 2. According to Kepler’s second law, a planet moves fastest when it is (a) closest to the Sun. (b) at the greatest distance from the Sun. (c) [The speed of the plan ...
dtu7ech11 - Fort Thomas Independent Schools
... brighter and the least luminous stars are about a hundred thousand times dimmer than the Sun. What colors are stars? Stars are found in a wide range of colors, from red through violet, as well as white. ...
... brighter and the least luminous stars are about a hundred thousand times dimmer than the Sun. What colors are stars? Stars are found in a wide range of colors, from red through violet, as well as white. ...
What is an atom?
... The light from a star is usually concentrated in a rather narrow range of wavelengths. The spectrum of a star’s light is approximately a thermal spectrum called a black body spectrum. A perfect black body emitter ...
... The light from a star is usually concentrated in a rather narrow range of wavelengths. The spectrum of a star’s light is approximately a thermal spectrum called a black body spectrum. A perfect black body emitter ...
Galaxies and the Universe bb
... Fate of the universe • Final fate depends on the average _______ of the universe • If the density is _____ than the critical density, then the universe would ________ • Current estimates point to _____ then the critical density and predict an _______________, or open, universe ...
... Fate of the universe • Final fate depends on the average _______ of the universe • If the density is _____ than the critical density, then the universe would ________ • Current estimates point to _____ then the critical density and predict an _______________, or open, universe ...
Quiz 1 Review
... Neutron stars spin extremely fast (1000 times per second). Any remaining electrons not fused with protons are excited by the stars rotation and interact with the neutron stars magnetic field. This interaction releases huge amounts of energy from the neutron stars N and S pole and they are seen as pu ...
... Neutron stars spin extremely fast (1000 times per second). Any remaining electrons not fused with protons are excited by the stars rotation and interact with the neutron stars magnetic field. This interaction releases huge amounts of energy from the neutron stars N and S pole and they are seen as pu ...
VISIT TO NORMAN LOCKYER OBSERVATORY IN SIDMOUTH
... pressure", resulting from the fact that electrons do not like being squashed too close together, prevents further collapse. This is called a "white dwarf". As the dying ember of a nuclear fusion reactor, they are exceedingly hot, but will gradually cool over time. The outer parts of the star are exp ...
... pressure", resulting from the fact that electrons do not like being squashed too close together, prevents further collapse. This is called a "white dwarf". As the dying ember of a nuclear fusion reactor, they are exceedingly hot, but will gradually cool over time. The outer parts of the star are exp ...
Star Classification
... The ancient Greeks thought this group of stars looked like a hunter, so they named it Orion after their mythical hunter. The line of three stars at the center is "Orion’s Belt." The many different colors of stars reflect the star’s temperature. The bright, red star in the upper left (with an arrow p ...
... The ancient Greeks thought this group of stars looked like a hunter, so they named it Orion after their mythical hunter. The line of three stars at the center is "Orion’s Belt." The many different colors of stars reflect the star’s temperature. The bright, red star in the upper left (with an arrow p ...
Solar Spectrum Birth of Spectroscopy Kirchhoff`s Laws Types of
... – metals are readily excited & ionized at these temperatures – lines from metals in the ultraviolet • Hydrogen lines strong – temperature is high enough to excite electrons in H atoms but not to ionize them ...
... – metals are readily excited & ionized at these temperatures – lines from metals in the ultraviolet • Hydrogen lines strong – temperature is high enough to excite electrons in H atoms but not to ionize them ...
hotstar_xrays
... t Sco is a B0 V star -- with a surface temperature of about 30,000 K (5 times the sun’s temperature), and with about 50,000 times the sun’s luminosity. It has unusual ultraviolet absorption lines, a very low projected rotational velocity, and -- perhaps most relevant -- seems to be very young. ...
... t Sco is a B0 V star -- with a surface temperature of about 30,000 K (5 times the sun’s temperature), and with about 50,000 times the sun’s luminosity. It has unusual ultraviolet absorption lines, a very low projected rotational velocity, and -- perhaps most relevant -- seems to be very young. ...
Life_Cycle_of_a_Star_Powerpoint
... • A star and a group of planets that revolve around the star. • Our solar system contains a star (the sun), nine planets, and thousands of asteroids. • Our sun is located on the edge of the Milky Way galaxy. ...
... • A star and a group of planets that revolve around the star. • Our solar system contains a star (the sun), nine planets, and thousands of asteroids. • Our sun is located on the edge of the Milky Way galaxy. ...
OUSNMAY06 - The George Abell Observatory
... CVn ds, (2.9,5.5) separation 19.6". Cor Coroli (Heart of Charles), A fine bluishwhite and white double star. NGC4151 (11.2) sg. Barred spiral with a bright nucleus. NGC4215 (10.5) ir. Located south and slightly west of NGC4244. NGC4244 (10.7) sg. Spiral galaxy seen edge-on appearing as a needle of ...
... CVn ds, (2.9,5.5) separation 19.6". Cor Coroli (Heart of Charles), A fine bluishwhite and white double star. NGC4151 (11.2) sg. Barred spiral with a bright nucleus. NGC4215 (10.5) ir. Located south and slightly west of NGC4244. NGC4244 (10.7) sg. Spiral galaxy seen edge-on appearing as a needle of ...
Globular Clusters
... What is a globular cluster? How do stars evolve? Observing Filters, tri-color image Age of and Distance to M13 Age of the Universe ...
... What is a globular cluster? How do stars evolve? Observing Filters, tri-color image Age of and Distance to M13 Age of the Universe ...
ASTR-1020: Astronomy II Course Lecture Notes - Faculty
... have temperatures less than 700 K and have strong bands of ammonia (NH3 ) seen at NIR wavelengths. So far, only one Y dwarf has been discovered. ...
... have temperatures less than 700 K and have strong bands of ammonia (NH3 ) seen at NIR wavelengths. So far, only one Y dwarf has been discovered. ...
Matariki-Maori New Year
... away (our Sun is 8 light minutes away) • The blue color is caused by blue light being scattered by dust. • The stars in the Pleiades are young100 million years old about 1/50th the age of our Sun ...
... away (our Sun is 8 light minutes away) • The blue color is caused by blue light being scattered by dust. • The stars in the Pleiades are young100 million years old about 1/50th the age of our Sun ...
Friday, August 28 - Otterbein University
... The Trouble with Angles • Angular size of an object cannot tell us its actual size – depends on how far away it is • Sun and Moon have very nearly the same angular size (30' = ½) when viewed from Earth ...
... The Trouble with Angles • Angular size of an object cannot tell us its actual size – depends on how far away it is • Sun and Moon have very nearly the same angular size (30' = ½) when viewed from Earth ...
08 September: How far away are the closest stars?
... in 1838 (Friedrich Bessel) • Closest star is Alpha Centauri, p=0.75 arcseconds, d=1.33 parsecs= 4.35 light years • Nearest stars are a few to many parsecs, 5 - 20 light years ...
... in 1838 (Friedrich Bessel) • Closest star is Alpha Centauri, p=0.75 arcseconds, d=1.33 parsecs= 4.35 light years • Nearest stars are a few to many parsecs, 5 - 20 light years ...
Name Date Life and Death of a Star 2015 1. In the main
... B. collision with another star C. gravitational collapse of the core of a massive star 29. When helium fusion takes over in a star's core, what happens? A. the energy output decreases B. energy output stays the same C. the energy output increases 30. A star that is gravitationally bound to another m ...
... B. collision with another star C. gravitational collapse of the core of a massive star 29. When helium fusion takes over in a star's core, what happens? A. the energy output decreases B. energy output stays the same C. the energy output increases 30. A star that is gravitationally bound to another m ...
Lecture notes -- pdf file - University of Iowa Astrophysics
... in 1838 (Friedrich Bessel) • Closest star is Alpha Centauri, p=0.75 arcseconds, d=1.33 parsecs= 4.35 light years • Nearest stars are a few to many parsecs, 5 - 20 light years ...
... in 1838 (Friedrich Bessel) • Closest star is Alpha Centauri, p=0.75 arcseconds, d=1.33 parsecs= 4.35 light years • Nearest stars are a few to many parsecs, 5 - 20 light years ...
s%nffi - mrtavares
... a group of very bright stars called red giants. The size of these giants can be estimated by comparing them with stars of known size that have the same surface temperature. Objects witir equal surface temperatlues radiate the same amount of energy per unit area. Therefore, any difference in the brig ...
... a group of very bright stars called red giants. The size of these giants can be estimated by comparing them with stars of known size that have the same surface temperature. Objects witir equal surface temperatlues radiate the same amount of energy per unit area. Therefore, any difference in the brig ...
Extra-Solar Life: Habitable Zones
... for life, then there is a limited volume of any stellar system where that might exist – the Habitable Zone • If we assume temperature is dominated by sun/starlight, then the HZ can be calculated for any given star • Likely star types for life are F, G, and K stars (bigger stars die fast; M stars hav ...
... for life, then there is a limited volume of any stellar system where that might exist – the Habitable Zone • If we assume temperature is dominated by sun/starlight, then the HZ can be calculated for any given star • Likely star types for life are F, G, and K stars (bigger stars die fast; M stars hav ...
High School Science Essential Curriculum - Astronomy
... Objectives - The student will be able to: a. Explain the role of natural forces and the conservation of angular momentum as they apply to the objects in our Universe including the formation of planets and satellites and the retention of an atmosphere. b. Describe and compare Earth’s physical propert ...
... Objectives - The student will be able to: a. Explain the role of natural forces and the conservation of angular momentum as they apply to the objects in our Universe including the formation of planets and satellites and the retention of an atmosphere. b. Describe and compare Earth’s physical propert ...
Lecture 9/10 Stellar evolution Ulf Torkelsson 1 Main sequence stars
... gains momentum and continues outward. The shock wave eventually reaches the stellar surface after a few hours, at which time the star appears as a supernova. Typically this will be a type II supernova, which is characterised by a spectrum with strong hydrogen lines. (There are also type I supernovae ...
... gains momentum and continues outward. The shock wave eventually reaches the stellar surface after a few hours, at which time the star appears as a supernova. Typically this will be a type II supernova, which is characterised by a spectrum with strong hydrogen lines. (There are also type I supernovae ...
lecture22
... hydrogen in the layers just outside the core enough to initiate shell hydrogen fusion. This fusion takes place at very high temperatures and the new thermal pressure causes the outer layers to expand into a giant star. Both the cooling/collapsing inert He core and the H-burning shell contributes to ...
... hydrogen in the layers just outside the core enough to initiate shell hydrogen fusion. This fusion takes place at very high temperatures and the new thermal pressure causes the outer layers to expand into a giant star. Both the cooling/collapsing inert He core and the H-burning shell contributes to ...
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.