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The Stars of Namaqualand
... The star Rigel, which belongs to Orion, is blue-white because of its high temperature and 57000 times brighter than our sun. In spite of the distant of 540 light years from the Earth, it shines as the seventh brightest star in our night sky. The astronomers believe, that Rigel is the most luminous s ...
... The star Rigel, which belongs to Orion, is blue-white because of its high temperature and 57000 times brighter than our sun. In spite of the distant of 540 light years from the Earth, it shines as the seventh brightest star in our night sky. The astronomers believe, that Rigel is the most luminous s ...
PPT 15MB - HubbleSOURCE
... Galactic Center (GC) was observed using the near-infrared camera on Hubble called NICMOS (Near-Infrared Camera and Multi-Object Spectrometer) ...
... Galactic Center (GC) was observed using the near-infrared camera on Hubble called NICMOS (Near-Infrared Camera and Multi-Object Spectrometer) ...
An Introduction To Parallax
... than the diameter of the Earth’s orbit. This means that the shift in angle we observe in Alpha Centauri is less than 1 second of arc, or less than the thickness of a hair seen across a large rooma . It was not until the mid–19th century that astronomers were able to measure such small parallaxes. In ...
... than the diameter of the Earth’s orbit. This means that the shift in angle we observe in Alpha Centauri is less than 1 second of arc, or less than the thickness of a hair seen across a large rooma . It was not until the mid–19th century that astronomers were able to measure such small parallaxes. In ...
Dynamics of nuclear burning during type-I X-ray bursts 1. 2. 3.
... 1. Overview of X-ray burst phenomena 2. Effects of rotation and structure of burning fronts 3. Propagation of burning on a sphere 4. Burning dynamics in magnetic fields -- application to SAX J1808 5. Conclusions and connection to ...
... 1. Overview of X-ray burst phenomena 2. Effects of rotation and structure of burning fronts 3. Propagation of burning on a sphere 4. Burning dynamics in magnetic fields -- application to SAX J1808 5. Conclusions and connection to ...
Slide 1
... normal and exert a pressure higher than normal ideal gas. Hence, this degenerate situation stops the collapse: • P ~ r (density) about 100 x P (ideal gas) • Electron energy and momentum become relativistic as calculated by S. Chandraseker (Nobel prize in ‘83 for ...
... normal and exert a pressure higher than normal ideal gas. Hence, this degenerate situation stops the collapse: • P ~ r (density) about 100 x P (ideal gas) • Electron energy and momentum become relativistic as calculated by S. Chandraseker (Nobel prize in ‘83 for ...
powerpoint - High Energy Physics at Wayne State
... excited states emit light red glow characteristic of hydrogen (red Balmer line) ...
... excited states emit light red glow characteristic of hydrogen (red Balmer line) ...
14.1 Introduction - University of Cambridge
... Although most white dwarfs are thought to be composed of carbon and oxygen, spectroscopy typically shows that their emitted light comes from an atmosphere which is observed to be either H-dominated or He-dominated. (see Figure 14.4). The dominant element is usually at least 1000 times more abundant ...
... Although most white dwarfs are thought to be composed of carbon and oxygen, spectroscopy typically shows that their emitted light comes from an atmosphere which is observed to be either H-dominated or He-dominated. (see Figure 14.4). The dominant element is usually at least 1000 times more abundant ...
Goal: To understand how we know distances to various
... • If you compare the apparent and absolute magnitudes of an object you get its distance. • How to do that? • 1) spectra – tells you what the mass of the star is by its temperature and its spectral type (although does not work so well for giants – works great for main sequences stars, but this separa ...
... • If you compare the apparent and absolute magnitudes of an object you get its distance. • How to do that? • 1) spectra – tells you what the mass of the star is by its temperature and its spectral type (although does not work so well for giants – works great for main sequences stars, but this separa ...
- Europhysics News
... 2009 and 2013. Other techniques, including direct imaging, have also led to several tens of detections and are expected to be very promising in the near future. As of today (December 2013), over a thousand exoplanets have been discovered in about 800 planetary systems. They show an incredible divers ...
... 2009 and 2013. Other techniques, including direct imaging, have also led to several tens of detections and are expected to be very promising in the near future. As of today (December 2013), over a thousand exoplanets have been discovered in about 800 planetary systems. They show an incredible divers ...
Unit 5 – Creating and Understanding Spectra
... The Sizes of Planets – and Stars We easily determine the sizes of planets in the Solar System because we can resolve them: see “how big they look”. That’s not the case for stars, which appear as dots of light. Given their temperatures, however, we can consider the total light they emit, and deduce ...
... The Sizes of Planets – and Stars We easily determine the sizes of planets in the Solar System because we can resolve them: see “how big they look”. That’s not the case for stars, which appear as dots of light. Given their temperatures, however, we can consider the total light they emit, and deduce ...
Astrophysics notes - School
... If the surface of a star is very hot, high energy photons will leave its surface. This will cause absorption spectra to be observed at the short wave end of the continuum. In a class O star, the temperature is high enough to ionise significant numbers of helium atoms. Helium absorption spectra are s ...
... If the surface of a star is very hot, high energy photons will leave its surface. This will cause absorption spectra to be observed at the short wave end of the continuum. In a class O star, the temperature is high enough to ionise significant numbers of helium atoms. Helium absorption spectra are s ...
The Pennsylvanian Period in Alabama: Looking Up Astronomy and
... If the Milky Way is mostly a two-armed spiral, then the Sun would pass through an arm every 100 million years or so. At these times, the Sun might pass near one of these nebulae, which look the way they do only because of the presence of very massive stars. This presents the possibility of the Sun ...
... If the Milky Way is mostly a two-armed spiral, then the Sun would pass through an arm every 100 million years or so. At these times, the Sun might pass near one of these nebulae, which look the way they do only because of the presence of very massive stars. This presents the possibility of the Sun ...
Chapter 8: The Pennsylvanian Period in Alabama: Looking Up
... change is due to two unrelated stars. If such changes as can occur for the Big Dipper can become noticeable over a period of only a hunded thousand years, imagine the changes that would occur over 310 milion years! Rigel Kentaurus (Rigel Kent for short, also known as Alpha Centauri) is currently the ...
... change is due to two unrelated stars. If such changes as can occur for the Big Dipper can become noticeable over a period of only a hunded thousand years, imagine the changes that would occur over 310 milion years! Rigel Kentaurus (Rigel Kent for short, also known as Alpha Centauri) is currently the ...
TAURUS ZODIAC CONSTELLATION In Greek mythology, Taurus
... nightly motion of the celestial sphere across the sky. Astronomers estimate that the cluster has approximately 500-1,000 stars, all of which are around 100 million years old. However, they vary considerably in type. The Pleiades themselves are represented by large, bright stars; there are also many ...
... nightly motion of the celestial sphere across the sky. Astronomers estimate that the cluster has approximately 500-1,000 stars, all of which are around 100 million years old. However, they vary considerably in type. The Pleiades themselves are represented by large, bright stars; there are also many ...
Section 3: Three Periodicities - Wobble, Tilt, and
... 3.2 Polaris and the Other Pole Stars Pop quiz: name the North Star. An easy one -- Polaris, right? "North Star" is the name that Western scientists have given the star that is closest to an imaginary line drawn into space from the North Pole. (Remember the envisioning exercise in Section 1.1? Imagi ...
... 3.2 Polaris and the Other Pole Stars Pop quiz: name the North Star. An easy one -- Polaris, right? "North Star" is the name that Western scientists have given the star that is closest to an imaginary line drawn into space from the North Pole. (Remember the envisioning exercise in Section 1.1? Imagi ...
PHYSICS 015
... This releases energy, keeping the core hot and stopping any further contraction. The Sun attains a new stable structure, now as a red giant – no longer a main sequence star. ...
... This releases energy, keeping the core hot and stopping any further contraction. The Sun attains a new stable structure, now as a red giant – no longer a main sequence star. ...
– What Will Happen?
... cease producing energy, lose pressure support, and contract in the core get still hotter in the middle, and ignite some new fusion reaction that creates progressively heavier nuclei. (Fusing C nuclei together will require very high temperatures indeed.) ...
... cease producing energy, lose pressure support, and contract in the core get still hotter in the middle, and ignite some new fusion reaction that creates progressively heavier nuclei. (Fusing C nuclei together will require very high temperatures indeed.) ...
5-E Galaxy T - McDonald Observatory
... Galaxies, compared to their size, are closer together than stars. They are also much more massive, having the combined mass of billions of stars. So, even over a large distance the force of gravity between galaxies can accelerate them toward each other. Think of bowling balls (galaxies) on a trampol ...
... Galaxies, compared to their size, are closer together than stars. They are also much more massive, having the combined mass of billions of stars. So, even over a large distance the force of gravity between galaxies can accelerate them toward each other. Think of bowling balls (galaxies) on a trampol ...
R136a1
![](https://commons.wikimedia.org/wiki/Special:FilePath/R136a1_star.jpg?width=300)
RMC 136a1 (usually abbreviated to R136a1) is a Wolf-Rayet star located at the center of R136, the central condensation of stars of the large NGC 2070 open cluster in the Tarantula Nebula. It lies at a distance of about 50 kiloparsecs (163,000 light-years) in the Large Magellanic Cloud. It has the highest mass and luminosity of any known star, at 265 M☉ and 8.7 million L☉, and also one of the hottest at over 50,000 K.