Debris disks and the search for life in the universe Gianni Cataldi
... the young star. The circumstellar disk is thus also called a protoplanetary disk (figure 1.1), which typically consist of 99% gas and 1% dust. The small dust grains gradually grow and eventually form planetesimals1 that are thought to be the building blocks of planets. By definition, planetesimals a ...
... the young star. The circumstellar disk is thus also called a protoplanetary disk (figure 1.1), which typically consist of 99% gas and 1% dust. The small dust grains gradually grow and eventually form planetesimals1 that are thought to be the building blocks of planets. By definition, planetesimals a ...
Slide 1
... First, a teaspoon of material from one can weigh up to a billion tons. (A large mountain) Second, an entire neutron star would be smaller than the Denver metro area. (3 times the mass of the whole sun!) Third, if you collapse a spinning thing, it speeds way up. Most neutron stars rotate between 3 an ...
... First, a teaspoon of material from one can weigh up to a billion tons. (A large mountain) Second, an entire neutron star would be smaller than the Denver metro area. (3 times the mass of the whole sun!) Third, if you collapse a spinning thing, it speeds way up. Most neutron stars rotate between 3 an ...
Introduction to Astronomy
... seas on the surface of the Moon. These areas he named: “mare” (sea in Latin.) They are still called by the same names today, even though there are no seas on the Moon. He found spots on the sun. He observed a supernova, (exploding star). He found four moons circling Jupiter. He thought that Jupiter ...
... seas on the surface of the Moon. These areas he named: “mare” (sea in Latin.) They are still called by the same names today, even though there are no seas on the Moon. He found spots on the sun. He observed a supernova, (exploding star). He found four moons circling Jupiter. He thought that Jupiter ...
ATLAS lifts the Cup: discovery of a new Milky Way satellite in Crater⋆†
... Understanding how dwarf galaxies and clusters evolve in relation to their environment remains a challenge. These objects can occupy both low- and high-density environments and are subject to both internal processes (mass segregation, evaporation and ejection of stars, bursts of star formation) and e ...
... Understanding how dwarf galaxies and clusters evolve in relation to their environment remains a challenge. These objects can occupy both low- and high-density environments and are subject to both internal processes (mass segregation, evaporation and ejection of stars, bursts of star formation) and e ...
November, 2015 - The Baton Rouge Astronomical Society
... 847 and counting: that’s the number of planets confirmed as existing around 642 stars within several hundred light-years of our Sun. And more than 2,000 additional detections are awaiting confirmation by follow-up observations. By far, the most potential exoplanets have been found by the NASA spacec ...
... 847 and counting: that’s the number of planets confirmed as existing around 642 stars within several hundred light-years of our Sun. And more than 2,000 additional detections are awaiting confirmation by follow-up observations. By far, the most potential exoplanets have been found by the NASA spacec ...
dark matter - University of Texas Astronomy Home Page
... bulge. The Sun’s orbit is marked by Star B and Star C is farther out in the disk than the Sun. Which star do you think is traveling fastest and which is traveling more slowly? ...
... bulge. The Sun’s orbit is marked by Star B and Star C is farther out in the disk than the Sun. Which star do you think is traveling fastest and which is traveling more slowly? ...
Discovery of White Dwarfs—8 Oct
... • Apparent mag is a logarithmetic expression of flux • If the apparent mag changes by 2.5, the flux is brighter by a factor of 10. • Fluxes and magnitudes of two stars A and B ...
... • Apparent mag is a logarithmetic expression of flux • If the apparent mag changes by 2.5, the flux is brighter by a factor of 10. • Fluxes and magnitudes of two stars A and B ...
P7 Further Physics
... Astronomers often use the “parsec” to describe galactic distances. A parsec is roughly 3¼ light years. Angles involved in parallax measurements are often very small and are measured in seconds of an arc (arcseconds). A second of an arc is 1/60th of a minute of an arc, which is 1/60th of a degree. In ...
... Astronomers often use the “parsec” to describe galactic distances. A parsec is roughly 3¼ light years. Angles involved in parallax measurements are often very small and are measured in seconds of an arc (arcseconds). A second of an arc is 1/60th of a minute of an arc, which is 1/60th of a degree. In ...
Electronic version
... based facilities worldwide, as well as the beautiful data and the astounding inferences made possible with the unique SOHO - Solar Oscillations and Heliospheric Observatory. More than a full day's worth of oral and poster presentations, fully embedded in the seven sessions program, will be devoted t ...
... based facilities worldwide, as well as the beautiful data and the astounding inferences made possible with the unique SOHO - Solar Oscillations and Heliospheric Observatory. More than a full day's worth of oral and poster presentations, fully embedded in the seven sessions program, will be devoted t ...
Stars
... by striking a balance between the gravity of their enormous mass and the pressure produced by the energy of fusion reactions. A main sequence star is in equilibrium as Hydrogen burning supports it against gravitational collapse. What happens as the hydrogen runs out? © 2007 Pearson Education Inc., p ...
... by striking a balance between the gravity of their enormous mass and the pressure produced by the energy of fusion reactions. A main sequence star is in equilibrium as Hydrogen burning supports it against gravitational collapse. What happens as the hydrogen runs out? © 2007 Pearson Education Inc., p ...
Effects of triple-α and C(α, γ )16 O reaction rates on the supernova
... The triple-α and 12 C(α, γ )16 O rates are the key nuclear reaction rates concerning He-burning in massive star evolution. As a consequence, explosive nucleosynthesis and the resulting supernova yields of a massive star would be influenced seriously by the two rates. We select four combinations from ...
... The triple-α and 12 C(α, γ )16 O rates are the key nuclear reaction rates concerning He-burning in massive star evolution. As a consequence, explosive nucleosynthesis and the resulting supernova yields of a massive star would be influenced seriously by the two rates. We select four combinations from ...
MESSIER - EarthLink
... such a resemblance to a comet in its form and brightness that I endeavored to find others, so that astronomers would no more confuse these same nebulae with comets just beginning to appear. I observed further with suitable refractors for the discovery of comets, and this is the purpose I had in mind ...
... such a resemblance to a comet in its form and brightness that I endeavored to find others, so that astronomers would no more confuse these same nebulae with comets just beginning to appear. I observed further with suitable refractors for the discovery of comets, and this is the purpose I had in mind ...
Life Histories Of Some Stars
... graph? Where do newborn babies cluster? Children? Or is there no clustering at all? Describe the shape of the graph? Is it a straight line? A curve? 5. Give each group the list of stars attached and the HR diagram attached. Instead of height and weight, the information is in Luminosity (compared to ...
... graph? Where do newborn babies cluster? Children? Or is there no clustering at all? Describe the shape of the graph? Is it a straight line? A curve? 5. Give each group the list of stars attached and the HR diagram attached. Instead of height and weight, the information is in Luminosity (compared to ...
Deep SDSS optical spectroscopy of distant halo stars I. Atmospheric
... difficult parameter to extract, and only a handful of methods are available as part of the SSPP. Only a few of the techniques derive all parameters simultaneously and in a consistent manner. An earlier version of our fitting code is included in the SSPP. However, it is only one of many, and the vers ...
... difficult parameter to extract, and only a handful of methods are available as part of the SSPP. Only a few of the techniques derive all parameters simultaneously and in a consistent manner. An earlier version of our fitting code is included in the SSPP. However, it is only one of many, and the vers ...
Which planet has never been orbited or flown past by a
... Hmmm…what would be a good way to start an introductory stars and galaxies class for non-science majors at a state university? Lots of equations?!? perhaps not Pretty pictures? that’d probably work, but there are so many… Dr. C. Renee James NASA Top Stars 2010 ...
... Hmmm…what would be a good way to start an introductory stars and galaxies class for non-science majors at a state university? Lots of equations?!? perhaps not Pretty pictures? that’d probably work, but there are so many… Dr. C. Renee James NASA Top Stars 2010 ...
Chapter 1: Introduction to Galaxies File - QMplus
... very little gas (and therefore very little dust), so almost all of the visible component is in the form of stars. With so little gas, there is no appreciable star formation, with the result that elliptical galaxies contain almost only old stars. Their colours are therefore red. K-type giant stars do ...
... very little gas (and therefore very little dust), so almost all of the visible component is in the form of stars. With so little gas, there is no appreciable star formation, with the result that elliptical galaxies contain almost only old stars. Their colours are therefore red. K-type giant stars do ...
WISE General Presentation - Georgia Southern University
... clouds, allowing us to see through or into them ...
... clouds, allowing us to see through or into them ...
Folie 1
... (protostellar) luminosity problem Young stars are fainter than expected Young stars accrete not enough material T-Tauri accretion rates are 10-7MSUN/yr or lower.... it would take 10 million years to assemble the Sun ...
... (protostellar) luminosity problem Young stars are fainter than expected Young stars accrete not enough material T-Tauri accretion rates are 10-7MSUN/yr or lower.... it would take 10 million years to assemble the Sun ...
The Chemical Composition of Carbon-Rich, Very Metal
... as [Fe/H]= −4 5 . One unexpected result of the HK survey is that many (∼ 10-15%) of the most metal-poor stars exhibit anomalously strong CH bands, most easily understood in terms of an excess of carbon in their atmospheres. Moreover, the trend of carbon overabundances appears to increase with declin ...
... as [Fe/H]= −4 5 . One unexpected result of the HK survey is that many (∼ 10-15%) of the most metal-poor stars exhibit anomalously strong CH bands, most easily understood in terms of an excess of carbon in their atmospheres. Moreover, the trend of carbon overabundances appears to increase with declin ...
3.2 Black body Radiation
... of electromagnetic radiation (EMR). (Can you think of any sources of information from beyond the Solar system that do not involve EMR in some form?) We can now detect and study EMR over a range of wavelength or, equivalently, photon energy, covering a range of at least 10 16 (ten thousand trillion s ...
... of electromagnetic radiation (EMR). (Can you think of any sources of information from beyond the Solar system that do not involve EMR in some form?) We can now detect and study EMR over a range of wavelength or, equivalently, photon energy, covering a range of at least 10 16 (ten thousand trillion s ...
Phase light curves for extrasolar Jupiter and Saturn
... photometry (Konacki et al. 2003) and another reference here? and then confirmed with Doppler measurements. It is expected that in the next decade, as photometric techniques are improved both from the ground and in space, direct detection of the reflected light from extrasolar planets will not only pro ...
... photometry (Konacki et al. 2003) and another reference here? and then confirmed with Doppler measurements. It is expected that in the next decade, as photometric techniques are improved both from the ground and in space, direct detection of the reflected light from extrasolar planets will not only pro ...