Planetary Systems Unit - Brandywine School District
... Complete Summary #1: Here are three lists of astronomical objects. Choose the list that shows the objects nearest to Earth first and the objects furthest from Earth last. a. Stars, the dwarf planet Pluto, galaxies b. Stars, galaxies, the dwarf planet Pluto c. The dwarf planet Pluto, stars, galaxies ...
... Complete Summary #1: Here are three lists of astronomical objects. Choose the list that shows the objects nearest to Earth first and the objects furthest from Earth last. a. Stars, the dwarf planet Pluto, galaxies b. Stars, galaxies, the dwarf planet Pluto c. The dwarf planet Pluto, stars, galaxies ...
Sample Exam 2
... Which of these stages will the future Sun not evolve through? A. Supernova B. Planetary Nebula C. White Dwarf D. Red Giant ...
... Which of these stages will the future Sun not evolve through? A. Supernova B. Planetary Nebula C. White Dwarf D. Red Giant ...
Chapter 14
... to ascend the asymptotic giant branch In stars like the Sun, electron pressure will eventually halt further contraction of the star and it eventually enters the "Planetary Nebula Stage." This is a stage of instability due to He fusion in a shell around the carbon core. This instability causes the ou ...
... to ascend the asymptotic giant branch In stars like the Sun, electron pressure will eventually halt further contraction of the star and it eventually enters the "Planetary Nebula Stage." This is a stage of instability due to He fusion in a shell around the carbon core. This instability causes the ou ...
Discrimination of exoplanetary and stellar radio flux
... It is due to thermal emission from regions of hot and dense plasma (e.g. over sunspots). It leads to flux density variations of a factor of two in the decimetric and centimetric wavelength range with 27 days period (due to the solar rotation). It is frequently circularly polarized. Noise storms Duri ...
... It is due to thermal emission from regions of hot and dense plasma (e.g. over sunspots). It leads to flux density variations of a factor of two in the decimetric and centimetric wavelength range with 27 days period (due to the solar rotation). It is frequently circularly polarized. Noise storms Duri ...
Chandra and NIR Observations of Galactic HII Regions
... Massive Stars in M16 • The 11 O5 V - O9.5 V stars in NGC 6611 are all detected with Chandra, with LX in the range 5.3´1030 – 1.8x1032 ergs s-1, LX/Lbol in the range 1.4x10-8 – 6.8x10-8, and kT from 0.49–0.96 keV. • The 2-Myr old O stars in NGC 6611 have relatively soft X-ray spectra and low LX/Lbol ...
... Massive Stars in M16 • The 11 O5 V - O9.5 V stars in NGC 6611 are all detected with Chandra, with LX in the range 5.3´1030 – 1.8x1032 ergs s-1, LX/Lbol in the range 1.4x10-8 – 6.8x10-8, and kT from 0.49–0.96 keV. • The 2-Myr old O stars in NGC 6611 have relatively soft X-ray spectra and low LX/Lbol ...
Goal: To understand how Saturn formed and what its core is
... Evolution to Hot Jupiter • As the planet moves in it is closer to material that was previously too close. • It is also now larger and will eat that material as well. • This will produce a run away effect that only ends when the gas giant either gets very close to the star or the protostar turns int ...
... Evolution to Hot Jupiter • As the planet moves in it is closer to material that was previously too close. • It is also now larger and will eat that material as well. • This will produce a run away effect that only ends when the gas giant either gets very close to the star or the protostar turns int ...
Chapter Zero Section 0.2 [reprint from Jesperson 7th] Supernovas
... 1. The speeding nuclei destroy many of the iron nuclei, creating a rich mixture of smaller particles such as helium nuclei and neutrons. 2. The temperature of the collapsing star reaches levels that cannot be achieved even in the most massive stars. At its culmination, the collapsing star disintegra ...
... 1. The speeding nuclei destroy many of the iron nuclei, creating a rich mixture of smaller particles such as helium nuclei and neutrons. 2. The temperature of the collapsing star reaches levels that cannot be achieved even in the most massive stars. At its culmination, the collapsing star disintegra ...
Chapter 13 Practice Questions
... A) the impact and subsequent explosion of a large comet nucleus on a star's surface. B) material falling into a black hole and being condensed to the point where a thermonuclear explosion is produced. C) the complete disintegration of a massive star due to a runaway thermonuclear explosion in the st ...
... A) the impact and subsequent explosion of a large comet nucleus on a star's surface. B) material falling into a black hole and being condensed to the point where a thermonuclear explosion is produced. C) the complete disintegration of a massive star due to a runaway thermonuclear explosion in the st ...
30-1
... a. inferred motion and actual motion b. actual motion and apparent motion c. actual motion and imagined motion d. inferred motion and apparent motion _____ 11. What causes the apparent motion of the stars, which we can see with the unaided eye? a. the actual movement of the stars b. the movement of ...
... a. inferred motion and actual motion b. actual motion and apparent motion c. actual motion and imagined motion d. inferred motion and apparent motion _____ 11. What causes the apparent motion of the stars, which we can see with the unaided eye? a. the actual movement of the stars b. the movement of ...
ASTR 1101-001 Spring 2008 - Louisiana State University
... fusion of He into C & O and into the “AGB” phase – But gravity is strong enough (because of the star’s larger mass) for succeeding stages of nuclear “burning” to be triggered – When the star exhausts a given variety of nuclear fuel in its core, the “ash” of the previous fusion stage is ...
... fusion of He into C & O and into the “AGB” phase – But gravity is strong enough (because of the star’s larger mass) for succeeding stages of nuclear “burning” to be triggered – When the star exhausts a given variety of nuclear fuel in its core, the “ash” of the previous fusion stage is ...
What Does an Astronomer Do?
... 186,000 miles per second, a light-year is a huge distance! The universe is made up of an uncountable number of galaxies. Only the nearest objects in our solar system can be reached by spacecraft in a reasonable length of time. Information about all the other objects in the universe comes from observ ...
... 186,000 miles per second, a light-year is a huge distance! The universe is made up of an uncountable number of galaxies. Only the nearest objects in our solar system can be reached by spacecraft in a reasonable length of time. Information about all the other objects in the universe comes from observ ...
The Sights of the Deep Sky - Peterborough Astronomical Society
... sky were once massive blue or white stars that now near the end of their lives. Most of the stars of the galaxy are dim red stars, much less massive than our Sun, and too faint to see without a large telescope. Stars have “life cycles”. They are born out of cold dust and gas in the Milky Way, then b ...
... sky were once massive blue or white stars that now near the end of their lives. Most of the stars of the galaxy are dim red stars, much less massive than our Sun, and too faint to see without a large telescope. Stars have “life cycles”. They are born out of cold dust and gas in the Milky Way, then b ...
Telescope Designs - Raleigh Charter High School
... More expensive per inch of aperture than Newtonians or Catadioptrics. Heavier, longer and bulkier than equivalent aperture Newtonians and catadioptrics. The cost and bulk factors limit the practical useful maximum size objective to small apertures Less suited for viewing small and faint deep sky obj ...
... More expensive per inch of aperture than Newtonians or Catadioptrics. Heavier, longer and bulkier than equivalent aperture Newtonians and catadioptrics. The cost and bulk factors limit the practical useful maximum size objective to small apertures Less suited for viewing small and faint deep sky obj ...
Introduction:
... Intended Audience: Discovery (World Service); Leading Edge, Frontiers (Radio 4) ...
... Intended Audience: Discovery (World Service); Leading Edge, Frontiers (Radio 4) ...
I. Stars - SharpSchool
... Stars The Brightness of Stars -Star: A luminous sphere of gas with enormous mass, that produces energy by fusion. -Fusion: The joining of separate nuclei. Common in nature, but not on Earth. ...
... Stars The Brightness of Stars -Star: A luminous sphere of gas with enormous mass, that produces energy by fusion. -Fusion: The joining of separate nuclei. Common in nature, but not on Earth. ...
We Are All Stardust: Nuclear Physics in the Cosmos
... all charged particles Strong Nuclear Force: felt by protons and neutrons, holds the nucleus together; involved in all nuclear reactions ...
... all charged particles Strong Nuclear Force: felt by protons and neutrons, holds the nucleus together; involved in all nuclear reactions ...
LIFE CYCLE OF A STAR
... mass of the sun, the star may contract. The 3x star contracts because of the strength of its gravity. The force of the contraction CRUSHES the dense center of the star. It leaves a BLACK HOLE. BLACK HOLE: An object that is so massive that light cannot escape its gravity. WOOH! ...
... mass of the sun, the star may contract. The 3x star contracts because of the strength of its gravity. The force of the contraction CRUSHES the dense center of the star. It leaves a BLACK HOLE. BLACK HOLE: An object that is so massive that light cannot escape its gravity. WOOH! ...
paper size (650 Kbtyes)
... 8 Draw a line from Arcturus to Vega. One-third of the way sits "The Northern Crown." Two-thirds of the ...
... 8 Draw a line from Arcturus to Vega. One-third of the way sits "The Northern Crown." Two-thirds of the ...
Introduction - Departamento de Astronomía
... nuclei below and up to the Fe-peak. Nuclear statistical equilibrium (NSE) processes, crossing the peak at 56Fe - 56Ni. Explosive nucleosynthesis, starting from NSE and reorganizing abundances up to 65Cu, occur in CCSNe and in SN Ia. Neutron captures (slow and rapid – s and r - processes). ...
... nuclei below and up to the Fe-peak. Nuclear statistical equilibrium (NSE) processes, crossing the peak at 56Fe - 56Ni. Explosive nucleosynthesis, starting from NSE and reorganizing abundances up to 65Cu, occur in CCSNe and in SN Ia. Neutron captures (slow and rapid – s and r - processes). ...
Chapter 21 Stellar Explosions
... A supernova, called SN1987A, did occur in the Large Magellanic Cloud, a neighboring galaxy, in 1987. Its light curve is somewhat atypical: ...
... A supernova, called SN1987A, did occur in the Large Magellanic Cloud, a neighboring galaxy, in 1987. Its light curve is somewhat atypical: ...
Star Life Cycle
... 4. How long ago was our sun formed? _____________________________ ►Protostar 5. What causes the “clumps” in the nebula to form? _________________________ What do these clumps become? ___________________________ 6. What is equilibrium in a star? ______________________________________________________ ...
... 4. How long ago was our sun formed? _____________________________ ►Protostar 5. What causes the “clumps” in the nebula to form? _________________________ What do these clumps become? ___________________________ 6. What is equilibrium in a star? ______________________________________________________ ...
White Dwarf Stars After nuclear burning ceases, a post
... He I lines only; no H or metals present No lines of any type present He II present (extremely hot) Only metal lines; no H or He present Carbon lines present ...
... He I lines only; no H or metals present No lines of any type present He II present (extremely hot) Only metal lines; no H or He present Carbon lines present ...
Planetary nebula
A planetary nebula, often abbreviated as PN or plural PNe, is a kind of emission nebula consisting of an expanding glowing shell of ionized gas ejected from old red giant stars late in their lives. The word ""nebula"" is Latin for mist or cloud and the term ""planetary nebula"" is a misnomer that originated in the 1780s with astronomer William Herschel because when viewed through his telescope, these objects appeared to him to resemble the rounded shapes of planets. Herschel's name for these objects was popularly adopted and has not been changed. They are a relatively short-lived phenomenon, lasting a few tens of thousands of years, compared to a typical stellar lifetime of several billion years.A mechanism for formation of most planetary nebulae is thought to be the following: at the end of the star's life, during the red giant phase, the outer layers of the star are expelled by strong stellar winds. Eventually, after most of the red giant's atmosphere is dissipated, the exposed hot, luminous core emits ultraviolet radiation to ionize the ejected outer layers of the star. Absorbed ultraviolet light energises the shell of nebulous gas around the central star, appearing as a bright coloured planetary nebula at several discrete visible wavelengths.Planetary nebulae may play a crucial role in the chemical evolution of the Milky Way, returning material to the interstellar medium from stars where elements, the products of nucleosynthesis (such as carbon, nitrogen, oxygen and neon), have been created. Planetary nebulae are also observed in more distant galaxies, yielding useful information about their chemical abundances.In recent years, Hubble Space Telescope images have revealed many planetary nebulae to have extremely complex and varied morphologies. About one-fifth are roughly spherical, but the majority are not spherically symmetric. The mechanisms which produce such a wide variety of shapes and features are not yet well understood, but binary central stars, stellar winds and magnetic fields may play a role.