PowerPoint File
... • Nearest star (1.3 parsecs) = 2.68 km = 1.66 miles • 8.5 kiloparsecs = 17,532 km = 10,870 miles (2.74 Earth radii) • Light signal transmitted from the GC would take 27,700 years to reach us ...
... • Nearest star (1.3 parsecs) = 2.68 km = 1.66 miles • 8.5 kiloparsecs = 17,532 km = 10,870 miles (2.74 Earth radii) • Light signal transmitted from the GC would take 27,700 years to reach us ...
Today`s Powerpoint
... Mass of end products is less than mass of 4 protons by 0.7%. Mass converted to energy. 600 millions of tons per second fused. Takes billions of years to convert p's to 4He in Sun's core. Process sets lifetime of stars. Hydrostatic Equilibrium: pressure from fusion reactions balances gravity. Sun is ...
... Mass of end products is less than mass of 4 protons by 0.7%. Mass converted to energy. 600 millions of tons per second fused. Takes billions of years to convert p's to 4He in Sun's core. Process sets lifetime of stars. Hydrostatic Equilibrium: pressure from fusion reactions balances gravity. Sun is ...
Stars - TeacherWeb
... • Most massive stars become black holes when they die. • The dividing line between inside and outside a black hole is called the event horizon. • Quasars are galaxies with black holes at their center. The Milky Way Galaxy has a black hole at its center named Sagittarius A*. ...
... • Most massive stars become black holes when they die. • The dividing line between inside and outside a black hole is called the event horizon. • Quasars are galaxies with black holes at their center. The Milky Way Galaxy has a black hole at its center named Sagittarius A*. ...
The Life of a Star
... together into a sphere. • The sphere becomes dense and hot. • Nuclear fusion changes hydrogen to helium. ...
... together into a sphere. • The sphere becomes dense and hot. • Nuclear fusion changes hydrogen to helium. ...
Chapter 1 Starts and Galaxies
... Constellation- group of stars that form a pattern Nova- star that suddenly increases in brightness in just a few hours or days Nebula- massive cloud of dust and gas between the stars Galaxy- huge collection of stars Spiral Galaxy- galaxy that is shaped like a pin wheel; one of the three types of gal ...
... Constellation- group of stars that form a pattern Nova- star that suddenly increases in brightness in just a few hours or days Nebula- massive cloud of dust and gas between the stars Galaxy- huge collection of stars Spiral Galaxy- galaxy that is shaped like a pin wheel; one of the three types of gal ...
No Slide Title
... becomes so dense it collapses in on itself, becoming a single point of zero size! Its gravity is so strong that even light cannot escape from inside a certain boundary - the EVENT HORIZON. The star is now a BLACK HOLE ! Although we will never actually SEE a black hole, we can see their effects. A nu ...
... becomes so dense it collapses in on itself, becoming a single point of zero size! Its gravity is so strong that even light cannot escape from inside a certain boundary - the EVENT HORIZON. The star is now a BLACK HOLE ! Although we will never actually SEE a black hole, we can see their effects. A nu ...
I have heard people call Jupiter a "failed star" that just did not get big
... into ever-larger planetary embryos. Once an embryo became about as massive as ten Earths, its self-gravity became strong enough to pull in gas directly from the disk. During this second step, the proto-Jupiter gained most of its present mass (a total of 318 times the mass of the Earth). Soon thereaf ...
... into ever-larger planetary embryos. Once an embryo became about as massive as ten Earths, its self-gravity became strong enough to pull in gas directly from the disk. During this second step, the proto-Jupiter gained most of its present mass (a total of 318 times the mass of the Earth). Soon thereaf ...
April 15th
... How do we know there are neutron stars? • The identification of Pulsars • Pulsars give out pulses of radio waves at precise ...
... How do we know there are neutron stars? • The identification of Pulsars • Pulsars give out pulses of radio waves at precise ...
Star Jeopardy Review #2
... They do not evolve off until helium is built up. Most of stars life time is spent as a main sequence star. ...
... They do not evolve off until helium is built up. Most of stars life time is spent as a main sequence star. ...
Polarimetry & Star
... Gravitational collapse of some of these “structures” produces the first stars and galaxies. ...
... Gravitational collapse of some of these “structures” produces the first stars and galaxies. ...
Star Life Cycle Worksheet Directions: Write in the correct stages of a
... core. The outer layer of this red star expands as the core contracts. 3. Nebula can form either an _______ star that is about the size of our Sun or a _________ star which can be over three times as big as our Sun! These stars stay in this period for most of their lives and they convert hydrogen to ...
... core. The outer layer of this red star expands as the core contracts. 3. Nebula can form either an _______ star that is about the size of our Sun or a _________ star which can be over three times as big as our Sun! These stars stay in this period for most of their lives and they convert hydrogen to ...
Ay123 Fall 2011 STELLAR STRUCTURE AND EVOLUTION Problem Set 1
... that has been returned returned to the interstellar medium 10 Gyr after this population was formed. 5. (5 pts) Prove that if the orbital plane of binaries are oriented randomly with respect to the plane of the sky, that the average value is sin3 i is 0.59. How has this result been useful in calibrat ...
... that has been returned returned to the interstellar medium 10 Gyr after this population was formed. 5. (5 pts) Prove that if the orbital plane of binaries are oriented randomly with respect to the plane of the sky, that the average value is sin3 i is 0.59. How has this result been useful in calibrat ...
protostars low mass stars intermediatemass stars red giant planetary
... into carbon. This stage will last about 100 million years. ...
... into carbon. This stage will last about 100 million years. ...
Today`s Powerpoint
... Millisecond pulsars: periods of 1 to a few msec. Probably accreted matter from a binary companion that made it spin faster. Gamma-ray Bursts: some pulsars produce bursts of gamma-rays, called Soft Gamma-Ray Repeaters or SGRs ...
... Millisecond pulsars: periods of 1 to a few msec. Probably accreted matter from a binary companion that made it spin faster. Gamma-ray Bursts: some pulsars produce bursts of gamma-rays, called Soft Gamma-Ray Repeaters or SGRs ...
Massive Stars - University of Washington
... These stars pop off in an astronomical blink of the eye ...
... These stars pop off in an astronomical blink of the eye ...
The Hidden Lives of Galaxies NSTA 2001
... • Under collapse, protons and electrons combine to form neutrons. • 10 Km across Black Hole (If mass of core > 5 x Solar) • Not even compacted neutrons can support weight of very massive stars. ...
... • Under collapse, protons and electrons combine to form neutrons. • 10 Km across Black Hole (If mass of core > 5 x Solar) • Not even compacted neutrons can support weight of very massive stars. ...
Light and the Electromagnetic Spectrum
... there is to look at the spectrum of the star. • From spectral lines astronomers can determine not only the element, but the temperature and density of that element in the star. • Emission lines can also tell us about the magnetic field of the star. The width of the line can tell us how fast the mate ...
... there is to look at the spectrum of the star. • From spectral lines astronomers can determine not only the element, but the temperature and density of that element in the star. • Emission lines can also tell us about the magnetic field of the star. The width of the line can tell us how fast the mate ...
Document
... • Under collapse, protons and electrons combine to form neutrons. • 10 Km across Black Hole (If mass of core > 5 x Solar) • Not even compacted neutrons can support weight of very massive stars. ...
... • Under collapse, protons and electrons combine to form neutrons. • 10 Km across Black Hole (If mass of core > 5 x Solar) • Not even compacted neutrons can support weight of very massive stars. ...
Astronomy - Wappingers Central School District
... conference. I will be updating it to reflect the changes in content in this years rules. I’m not sure yet how to test 50 teams at States on the use of DS9 image viewing software, and won’t ...
... conference. I will be updating it to reflect the changes in content in this years rules. I’m not sure yet how to test 50 teams at States on the use of DS9 image viewing software, and won’t ...
Definitions
... Spectroscopy – is the systematic study of spectra and spectral lines Blackbody – is a hypothetical body that is a perfect absorber and emitter of EMR C spectrum – consists of a continuous range of frequencies w/o either bright or dark lines, appearing as a continuous range of colours E spectrum – co ...
... Spectroscopy – is the systematic study of spectra and spectral lines Blackbody – is a hypothetical body that is a perfect absorber and emitter of EMR C spectrum – consists of a continuous range of frequencies w/o either bright or dark lines, appearing as a continuous range of colours E spectrum – co ...
Earth Science 25.2B : Stellar Evolution
... a neutron star would have a very strong magnetic field. Further, as a star collapses, it will ...
... a neutron star would have a very strong magnetic field. Further, as a star collapses, it will ...
Life Cycle of a Star
... Step Five Stars bigger than our sun will collapse so quickly they explode into a __________________. The core that is leftover after a supernova may form a ______________ star. If the leftover core was above a certain mass, it will continue to collapse in on itself and form a _______ _________. Its ...
... Step Five Stars bigger than our sun will collapse so quickly they explode into a __________________. The core that is leftover after a supernova may form a ______________ star. If the leftover core was above a certain mass, it will continue to collapse in on itself and form a _______ _________. Its ...
Chapter 20 The Universe
... =darks areas are sinking areas Sun’s Atmosphere 1. Chromosphere- above photosphere - “sphere of color” bright red - 2500 km thick - 100,000 degrees C (hotter!) -only seen during solar eclipse photosphere is blocked -Solar prominences- erupting clouds of gas that fall back to sun Motions & Activities ...
... =darks areas are sinking areas Sun’s Atmosphere 1. Chromosphere- above photosphere - “sphere of color” bright red - 2500 km thick - 100,000 degrees C (hotter!) -only seen during solar eclipse photosphere is blocked -Solar prominences- erupting clouds of gas that fall back to sun Motions & Activities ...
Black Holes: Edge of Infinity Jonathan McKinney
... •Million-Billion solar mass BHs •Nearly every galaxy has BH •BH surrounded by disk •Stars can form in outer disk •10% are “active” with jets •Jets observed mostly in radio ...
... •Million-Billion solar mass BHs •Nearly every galaxy has BH •BH surrounded by disk •Stars can form in outer disk •10% are “active” with jets •Jets observed mostly in radio ...
Life Cycle of a Star
... of stars Average stars become red giants then white dwarfs More massive stars explode into a variety of objects ...
... of stars Average stars become red giants then white dwarfs More massive stars explode into a variety of objects ...
Cygnus X-1
Cygnus X-1 (abbreviated Cyg X-1) is a well-known galactic X-ray source, thought to be a black hole, in the constellation Cygnus. It was discovered in 1964 during a rocket flight and is one of the strongest X-ray sources seen from Earth, producing a peak X-ray flux density of 6977229999999999999♠2.3×10−23 Wm−2 Hz−1 (7003230000000000000♠2.3×103 Jansky). Cygnus X-1 was the first X-ray source widely accepted to be a black hole and it remains among the most studied astronomical objects in its class. The compact object is now estimated to have a mass about 14.8 times the mass of the Sun and has been shown to be too small to be any known kind of normal star, or other likely object besides a black hole. If so, the radius of its event horizon is about 7004440000000000000♠44 km.Cygnus X-1 belongs to a high-mass X-ray binary system about 7019574266339685654♠6070 ly from the Sun that includes a blue supergiant variable star designated HDE 226868 which it orbits at about 0.2 AU, or 20% of the distance from the Earth to the Sun. A stellar wind from the star provides material for an accretion disk around the X-ray source. Matter in the inner disk is heated to millions of degrees, generating the observed X-rays. A pair of jets, arranged perpendicular to the disk, are carrying part of the energy of the infalling material away into interstellar space.This system may belong to a stellar association called Cygnus OB3, which would mean that Cygnus X-1 is about five million years old and formed from a progenitor star that had more than 7001400000000000000♠40 solar masses. The majority of the star's mass was shed, most likely as a stellar wind. If this star had then exploded as a supernova, the resulting force would most likely have ejected the remnant from the system. Hence the star may have instead collapsed directly into a black hole.Cygnus X-1 was the subject of a friendly scientific wager between physicists Stephen Hawking and Kip Thorne in 1975, with Hawking betting that it was not a black hole. He conceded the bet in 1990 after observational data had strengthened the case that there was indeed a black hole in the system. This hypothesis has not been confirmed due to a lack of direct observation but has generally been accepted from indirect evidence.