Slayt 1
... However, as a gas temperature goes up, the average speed of the particles goes up and the protons get closer before repelling one another. If the proton get very close, the short-range nuclear force ...
... However, as a gas temperature goes up, the average speed of the particles goes up and the protons get closer before repelling one another. If the proton get very close, the short-range nuclear force ...
the size and structure of the universe
... are balls of gas that produce their own energy by the process of NUCLEAR FUSION; they are the major features of galaxies – diameter of the sun (an average star) = 870,000 miles (1,392,000 km.) – That’s over 100,000 times the diameter of the Earth. Over 1,000,000 Earths could fit inside of the Sun ...
... are balls of gas that produce their own energy by the process of NUCLEAR FUSION; they are the major features of galaxies – diameter of the sun (an average star) = 870,000 miles (1,392,000 km.) – That’s over 100,000 times the diameter of the Earth. Over 1,000,000 Earths could fit inside of the Sun ...
Astronomy
... Something that is achieved when the inward force of gravity is balanced by the outward pressure from fusion and radiation inside a star ...
... Something that is achieved when the inward force of gravity is balanced by the outward pressure from fusion and radiation inside a star ...
APS Apr 2008 - User Web Pages
... The exceptions are the rule • Bursts tend to decrease in frequency at higher accretion rates, rather than increasing, as expected theoretically • Such bursts are often much fainter than might be expected (given the wait time and inferred accretion rate), suggesting an “energy leak” • A (possibly) r ...
... The exceptions are the rule • Bursts tend to decrease in frequency at higher accretion rates, rather than increasing, as expected theoretically • Such bursts are often much fainter than might be expected (given the wait time and inferred accretion rate), suggesting an “energy leak” • A (possibly) r ...
Chapter 24 Test:Stars/Galaxies
... viewed from two locations. (a) Apparent magnitude, (b) The Doppler shift, (c) Absolute magnitude, (d) Parallax. ...
... viewed from two locations. (a) Apparent magnitude, (b) The Doppler shift, (c) Absolute magnitude, (d) Parallax. ...
(Science 2012) Gal-Yam
... shown (18, 26) that a carbon- Fig. 2. Spectra of SLSN-II events. A spectrum of SN 1999bd obtained on 22 March several additional examples have oxygen core with a mass of ~43 M⊙ 1999 with the 2.5-m Dupont telescope at Las Campanas (blue) is compared with been studied in some detail. spectra of SN 200 ...
... shown (18, 26) that a carbon- Fig. 2. Spectra of SLSN-II events. A spectrum of SN 1999bd obtained on 22 March several additional examples have oxygen core with a mass of ~43 M⊙ 1999 with the 2.5-m Dupont telescope at Las Campanas (blue) is compared with been studied in some detail. spectra of SN 200 ...
Document
... • If you know how luminous a star REALLY is and how bright it looks from Earth, you can determine how far away it must be to look that faint. • For any star in the sky, we KNOW: – Apparent Magnitude (m) – Spectral Type (O, B, A, F, G, K, M) – Luminosity Class (Main Sequence, Giant, etc…). These are ...
... • If you know how luminous a star REALLY is and how bright it looks from Earth, you can determine how far away it must be to look that faint. • For any star in the sky, we KNOW: – Apparent Magnitude (m) – Spectral Type (O, B, A, F, G, K, M) – Luminosity Class (Main Sequence, Giant, etc…). These are ...
stellar_explosions - UT Austin (Astronomy)
... with observations (Fig. 21.13), e.g. the peaks at C, O and Fe, and even the patterns in between and the s-process patterns. This is amazing agreement considering that we are not even sure about the details of stellar explosions. 2. Technetium—this element is predicted to be produced in the s-process ...
... with observations (Fig. 21.13), e.g. the peaks at C, O and Fe, and even the patterns in between and the s-process patterns. This is amazing agreement considering that we are not even sure about the details of stellar explosions. 2. Technetium—this element is predicted to be produced in the s-process ...
NEUTRON STAR?
... • We will be holding an optional observing night this coming Tuesday, Nov. 8th from 7-9 p.m. on the Science Center roof. We'll be looking at Mars, stellar clusters, binary stars, and more... • Because we live in lovely cloudy Boston, we have to prepare for inclement weather. We will make an announce ...
... • We will be holding an optional observing night this coming Tuesday, Nov. 8th from 7-9 p.m. on the Science Center roof. We'll be looking at Mars, stellar clusters, binary stars, and more... • Because we live in lovely cloudy Boston, we have to prepare for inclement weather. We will make an announce ...
Slide 1 - Arif Solmaz
... Distance measurements of some gamma bursts show them to be very far away—2 billion parsecs for the first one measured. Occasionally the spectrum of a burst can be measured, allowing distance determination: ...
... Distance measurements of some gamma bursts show them to be very far away—2 billion parsecs for the first one measured. Occasionally the spectrum of a burst can be measured, allowing distance determination: ...
What MSU Astronomers Will Do with the SOAR
... • Measuring this relation will help identify what Dark Energy really is ...
... • Measuring this relation will help identify what Dark Energy really is ...
Chapter 26
... Graph of the surface temp., or color and absolute brightness of sample stars 2. Used to estimate the sizes of the stars and their distances, and to infer how stars change over time 3. Main sequence- diagonal line on the diagram where 90% of stars are found 4. Supergiants- very bright, very large sta ...
... Graph of the surface temp., or color and absolute brightness of sample stars 2. Used to estimate the sizes of the stars and their distances, and to infer how stars change over time 3. Main sequence- diagonal line on the diagram where 90% of stars are found 4. Supergiants- very bright, very large sta ...
Chapter 25 Study guide Answer Key
... a. Explosion; atoms form; stars form; all matter concentrated at a single point. b. All matter concentrated at a single point; explosion; atoms form; stars form. c. Explosion; stars form; all matter concentrated at a single point; atoms form. d. Stars form; atoms form; all matter concentrated at a s ...
... a. Explosion; atoms form; stars form; all matter concentrated at a single point. b. All matter concentrated at a single point; explosion; atoms form; stars form. c. Explosion; stars form; all matter concentrated at a single point; atoms form. d. Stars form; atoms form; all matter concentrated at a s ...
PHYSICS 113 Assignment #9 SOLUTIONS Chapter 17 13. Starting
... particles in the gas causes the gas to radiate energy at all wavelengths in the EM spectrum. It is this radiation from the hot gas that we see as the tremendous outpouring of energy from quasars. ...
... particles in the gas causes the gas to radiate energy at all wavelengths in the EM spectrum. It is this radiation from the hot gas that we see as the tremendous outpouring of energy from quasars. ...
Ch. 27 Stars & Galaxies
... o As the white dwarf cools and no longer emits energy it becomes a black dwarf. o Novas: Explosions that occur during the process of cooling. ...
... o As the white dwarf cools and no longer emits energy it becomes a black dwarf. o Novas: Explosions that occur during the process of cooling. ...
Gamma-ray burst
Gamma-ray bursts (GRBs) are flashes of gamma rays associated with extremely energetic explosions that have been observed in distant galaxies. They are the brightest electromagnetic events known to occur in the universe. Bursts can last from ten milliseconds to several hours. The initial burst is usually followed by a longer-lived ""afterglow"" emitted at longer wavelengths (X-ray, ultraviolet, optical, infrared, microwave and radio).Most observed GRBs are believed to consist of a narrow beam of intense radiation released during a supernova or hypernova as a rapidly rotating, high-mass star collapses to form a neutron star, quark star, or black hole. A subclass of GRBs (the ""short"" bursts) appear to originate from a different process – this may be due to the merger of binary neutron stars. The cause of the precursor burst observed in some of these short events may be due to the development of a resonance between the crust and core of such stars as a result of the massive tidal forces experienced in the seconds leading up to their collision, causing the entire crust of the star to shatter.The sources of most GRBs are billions of light years away from Earth, implying that the explosions are both extremely energetic (a typical burst releases as much energy in a few seconds as the Sun will in its entire 10-billion-year lifetime) and extremely rare (a few per galaxy per million years). All observed GRBs have originated from outside the Milky Way galaxy, although a related class of phenomena, soft gamma repeater flares, are associated with magnetars within the Milky Way. It has been hypothesized that a gamma-ray burst in the Milky Way, pointing directly towards the Earth, could cause a mass extinction event.GRBs were first detected in 1967 by the Vela satellites, a series of satellites designed to detect covert nuclear weapons tests. Hundreds of theoretical models were proposed to explain these bursts in the years following their discovery, such as collisions between comets and neutron stars. Little information was available to verify these models until the 1997 detection of the first X-ray and optical afterglows and direct measurement of their redshifts using optical spectroscopy, and thus their distances and energy outputs. These discoveries, and subsequent studies of the galaxies and supernovae associated with the bursts, clarified the distance and luminosity of GRBs. These facts definitively placed them in distant galaxies and also connected long GRBs with the explosion of massive stars, the only possible source for the energy outputs observed.