Light Years - Spring Creek Elementary
... that it is 24,689,699,202,000 miles away? Or, would you say it is about 265,480.637 AU away? This is a little better, but is still a very large number. More likely, you would tell them it is about 4.2 light years away. So what is a light year? A light year represents the distance light travels in on ...
... that it is 24,689,699,202,000 miles away? Or, would you say it is about 265,480.637 AU away? This is a little better, but is still a very large number. More likely, you would tell them it is about 4.2 light years away. So what is a light year? A light year represents the distance light travels in on ...
A1993KK54100001
... The New York conference was a fiasco, dominated by a report of startling new observations that turned out to be entirely false and by theoretical models of radially pulsating white dwarf stars. But I did not have to wait long for the confirmations of my theory. By October of that year, the Australia ...
... The New York conference was a fiasco, dominated by a report of startling new observations that turned out to be entirely false and by theoretical models of radially pulsating white dwarf stars. But I did not have to wait long for the confirmations of my theory. By October of that year, the Australia ...
Section 3: Evolution of Stars pages 114-119
... Obj: Describe how stars are classified Stars are classified by their size, temperature, color and brightness Obj: Compare the sun to other types of stars on the H-R diagram Our sun is average in terms of size, temperature, brightness, and color. It is a main sequence star. Describe how star ...
... Obj: Describe how stars are classified Stars are classified by their size, temperature, color and brightness Obj: Compare the sun to other types of stars on the H-R diagram Our sun is average in terms of size, temperature, brightness, and color. It is a main sequence star. Describe how star ...
Very Low Mass Stars as Optimum Sites of Habitable Planets
... SNe and UV from novae qualify. Very uncertain! • Cosmic rays from supernovae could be most likely event for disruption of atmospheric chemistry (and development of radiation resistance in longer-lived organisms), because scattering off interstellar magnetic field fluctuations results in large spread ...
... SNe and UV from novae qualify. Very uncertain! • Cosmic rays from supernovae could be most likely event for disruption of atmospheric chemistry (and development of radiation resistance in longer-lived organisms), because scattering off interstellar magnetic field fluctuations results in large spread ...
Our Universe
... Asteroids and other objects come close to our planet EVERY DAY! Most of the time we never notice them, but with improving technologies we are detecting more of them, and detecting them earlier. ...
... Asteroids and other objects come close to our planet EVERY DAY! Most of the time we never notice them, but with improving technologies we are detecting more of them, and detecting them earlier. ...
Searching for the Most Distant Black Holes in the Early
... • Predicted properties of distant black holes? – should be strong X-ray sources (from hot gas) – should be strong infrared sources (from hot dust) – should have very faint (or none) optical emission ...
... • Predicted properties of distant black holes? – should be strong X-ray sources (from hot gas) – should be strong infrared sources (from hot dust) – should have very faint (or none) optical emission ...
Chapter 15 Test Study Sheet
... learned from studying stars and galaxies and their evolution. As a basis for understanding this concept: a. Students know galaxies are clusters of billions of stars and may have different shapes. Know how scientists can detect the presence of a planet around a distant star. Know that there are t ...
... learned from studying stars and galaxies and their evolution. As a basis for understanding this concept: a. Students know galaxies are clusters of billions of stars and may have different shapes. Know how scientists can detect the presence of a planet around a distant star. Know that there are t ...
Lecture 17: General Relativity and Black Holes
... (b) X-ray flares detected from Sag A* have very short variation timescales. (c) Infrared observations indicate there is a bar at the galactic center. (d) is a very strong source of X-ray and synchrotron emission. 10. Observations at which of the following wavelengths indicate that Sag A has a very s ...
... (b) X-ray flares detected from Sag A* have very short variation timescales. (c) Infrared observations indicate there is a bar at the galactic center. (d) is a very strong source of X-ray and synchrotron emission. 10. Observations at which of the following wavelengths indicate that Sag A has a very s ...
c - Fsusd
... 9) The Hertzsprung-Russell diagram graphs stars’ ______. a) absolute brightness & temperature b) apparent brightness & absolute brightness c) distance & absolute brightness d) diameter & apparent brightness ...
... 9) The Hertzsprung-Russell diagram graphs stars’ ______. a) absolute brightness & temperature b) apparent brightness & absolute brightness c) distance & absolute brightness d) diameter & apparent brightness ...
Test - Hampton Science 8A 8B 8C 8D 8E Stars are classified on the
... Stars are classified on the Hertzsprung - Russell diagram according to their absolute magnitude and their surface temperatures at a given time in a star’s life cycle. What classification would a star have if it was very hot and very bright? ...
... Stars are classified on the Hertzsprung - Russell diagram according to their absolute magnitude and their surface temperatures at a given time in a star’s life cycle. What classification would a star have if it was very hot and very bright? ...
1 - Pi of the Sky
... 2.4 Cosmic and human made accelerators Where do the cosmic rays come from? Some of them come from the Sun and other stars. However, these are rather soft. High energy particles are produced in more violent environment such as supernovae explosions, gamma ray bursts, active galaxy nuclei, microquasa ...
... 2.4 Cosmic and human made accelerators Where do the cosmic rays come from? Some of them come from the Sun and other stars. However, these are rather soft. High energy particles are produced in more violent environment such as supernovae explosions, gamma ray bursts, active galaxy nuclei, microquasa ...
Review Guide
... 5. What type of galaxy contains both young and old stars? 6. What type of galaxy contains only old stars? 7. What type of galaxy contains only young stars? 8. Besides their shape what other characteristic distinguishes the different types of galaxies from each other? 9. Why do distant galaxies appea ...
... 5. What type of galaxy contains both young and old stars? 6. What type of galaxy contains only old stars? 7. What type of galaxy contains only young stars? 8. Besides their shape what other characteristic distinguishes the different types of galaxies from each other? 9. Why do distant galaxies appea ...
Final Exam: Chs 4-5, 12-17
... a. An excess of hydrogen atoms causes an explosion that crushes the star’s core. b. When the iron core becomes sufficiently massive, the electrons merge with protons to form neutrons, reducing core pressure and allowing it to collapse. c. As carbon builds up in the core, helium shell burning pushes ...
... a. An excess of hydrogen atoms causes an explosion that crushes the star’s core. b. When the iron core becomes sufficiently massive, the electrons merge with protons to form neutrons, reducing core pressure and allowing it to collapse. c. As carbon builds up in the core, helium shell burning pushes ...
Lecture 19 The Milky Way Galaxy
... - Long spiral patterns of bright stars, HII regions, star clusters, gas and dust - Sun is located on inner edge of one ...
... - Long spiral patterns of bright stars, HII regions, star clusters, gas and dust - Sun is located on inner edge of one ...
The Galactic Super Star Cluster Westerlund 1
... times the mass of Orion. Therefore, we would have expected diffuse emission with L x = 3x10 35 erg s-1, which is five times more flux than we observe. We suggest that the IMF is nonstandard, as is often claimed for young, massive star clusters. ...
... times the mass of Orion. Therefore, we would have expected diffuse emission with L x = 3x10 35 erg s-1, which is five times more flux than we observe. We suggest that the IMF is nonstandard, as is often claimed for young, massive star clusters. ...
Astronomical distance
... Astronomical distances Light travels at an enormous speed (300 000 km/s) but even so the distances between stars and between our galaxy and other galaxies are so vast that even light takes a long time to travel to us from these distant objects. As you know distances in astronomy can be measure in li ...
... Astronomical distances Light travels at an enormous speed (300 000 km/s) but even so the distances between stars and between our galaxy and other galaxies are so vast that even light takes a long time to travel to us from these distant objects. As you know distances in astronomy can be measure in li ...
Astronomy Review revised Key
... 20. How does red shift show that the universe is still expanding? Red light waves have longer wavelengths than blue light waves, indicating that the galaxies are moving farther out as the universe expands. 21. What does the Hertzsprung - Russell diagram show? Temperature, brightness, color, and clas ...
... 20. How does red shift show that the universe is still expanding? Red light waves have longer wavelengths than blue light waves, indicating that the galaxies are moving farther out as the universe expands. 21. What does the Hertzsprung - Russell diagram show? Temperature, brightness, color, and clas ...
Constellation
... stellar blast is slamming into regions along the ring's inner regions, heating them up, and causing them to glow. The ring, about a light-year across, was probably shed by the star about 20,000 years before it exploded. Astronomers detected the first bright spot in 1997, but now they see dozens of s ...
... stellar blast is slamming into regions along the ring's inner regions, heating them up, and causing them to glow. The ring, about a light-year across, was probably shed by the star about 20,000 years before it exploded. Astronomers detected the first bright spot in 1997, but now they see dozens of s ...
The Electromagnetic Spectrum: Astronomy 1
... are very hot and show up in the ultraviolet region of the spectrum. The image was made with a telescope carried aboard a space shuttle. ...
... are very hot and show up in the ultraviolet region of the spectrum. The image was made with a telescope carried aboard a space shuttle. ...
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.