Document
... Time and space did not exist until the Big-Bang event (estimated to have occurred about 15 billion years ago). The contents of the entire Universe was once compressed into a point the ‘size’ of a single electron. The Universe must have initially “inflated” in size, expanding many times faster than t ...
... Time and space did not exist until the Big-Bang event (estimated to have occurred about 15 billion years ago). The contents of the entire Universe was once compressed into a point the ‘size’ of a single electron. The Universe must have initially “inflated” in size, expanding many times faster than t ...
Low mass stars
... How do we obtain the mass of stars? – use binary star systems and Kepler’s 3rd Law (for visible binaries – for spectroscopic binaries the orbital inclination needs to be known). Eclipsing binaries are even better! The method is the same as used to calculate the properties of extrasolar planets. As w ...
... How do we obtain the mass of stars? – use binary star systems and Kepler’s 3rd Law (for visible binaries – for spectroscopic binaries the orbital inclination needs to be known). Eclipsing binaries are even better! The method is the same as used to calculate the properties of extrasolar planets. As w ...
Photons
... Fig. 3. The filter sets used in the present work. From top to bottom, we show the filter+detector transmission curves S λ for the systems: (1) HST/NICMOS, (2) HST/WFPC2, (3) Washington, (4) ESO/EMMI, (5) ESO/WFI U BVRIZ + ESO/SOFI JHK, and (6) Johnson-CousinsGlass. All references are given in Sect. ...
... Fig. 3. The filter sets used in the present work. From top to bottom, we show the filter+detector transmission curves S λ for the systems: (1) HST/NICMOS, (2) HST/WFPC2, (3) Washington, (4) ESO/EMMI, (5) ESO/WFI U BVRIZ + ESO/SOFI JHK, and (6) Johnson-CousinsGlass. All references are given in Sect. ...
Edited_Lecture_Transcripts_05_06 - 05 - astronomo
... more about Earth than about any other planet. Whatever theories we develop should first be tested where we can actually measure things, which is on Earth. So let's do a quick pass. Of course, Earth Sciences is a huge field that I wouldn't be qualified to teach even if I had the time, but let's do a ...
... more about Earth than about any other planet. Whatever theories we develop should first be tested where we can actually measure things, which is on Earth. So let's do a quick pass. Of course, Earth Sciences is a huge field that I wouldn't be qualified to teach even if I had the time, but let's do a ...
Jura et al. 2004 - Department of Physics and Astronomy
... estimated to be between 0.02 M⊕ and 0.1 M⊕ (Bernstein et al. 2003; Luu & Jewitt 2002). Typical analogs of the Kuiper Belt may have total masses ≤ 0.1 M⊕ (Jura 2004). Since we observed stars with notable infrared excesses, we probably selected objects with particularly massive systems of parent bodie ...
... estimated to be between 0.02 M⊕ and 0.1 M⊕ (Bernstein et al. 2003; Luu & Jewitt 2002). Typical analogs of the Kuiper Belt may have total masses ≤ 0.1 M⊕ (Jura 2004). Since we observed stars with notable infrared excesses, we probably selected objects with particularly massive systems of parent bodie ...
Our Local Group of Galaxies
... • This list has varied somewhat over the past decade or so as better data (e.g. deep color-magnitude diagrams) have provided better distance estimates, leading to improved LG membership (or not) classifications. ...
... • This list has varied somewhat over the past decade or so as better data (e.g. deep color-magnitude diagrams) have provided better distance estimates, leading to improved LG membership (or not) classifications. ...
Laser Interferometer Gravitational-wave Observatory
... Predict the bending of light passing in the vicinity of the massive ...
... Predict the bending of light passing in the vicinity of the massive ...
lect3 — 1 Measuring stars: What can be measured?
... MS stars are only individually visible well within our Galaxy. Standard candles: This generalizes to the idea of a standard candle, which is an object for which you can determine the intrinsic luminosity (or M ) without knowing its distance. Standard candles are hugely important in astronomy, since ...
... MS stars are only individually visible well within our Galaxy. Standard candles: This generalizes to the idea of a standard candle, which is an object for which you can determine the intrinsic luminosity (or M ) without knowing its distance. Standard candles are hugely important in astronomy, since ...
The Electric Universe by Wallace Thornhill and David Talbott
... Raised in Portland, Oregon, David Talbott has remained in the area all his life. A graduate of Portland State University, where he majored in education and political science, he returned briefly for graduate work in urban studies. His college observations on the failure of modern education led him t ...
... Raised in Portland, Oregon, David Talbott has remained in the area all his life. A graduate of Portland State University, where he majored in education and political science, he returned briefly for graduate work in urban studies. His college observations on the failure of modern education led him t ...
55-80 BIOGRAPHY_of_A STAR
... k = Boltzman’s constant Neutrons collapse to the center, forming a much smaller (~10km~Boston) neutron star (me/mn ~ 1/2000) … then collapsing to a black hole if 12 msun ...
... k = Boltzman’s constant Neutrons collapse to the center, forming a much smaller (~10km~Boston) neutron star (me/mn ~ 1/2000) … then collapsing to a black hole if 12 msun ...
A radiogenic heating evolution model for cosmochemically Earth
... Amelin et al., 2002; Bouvier and Wadhwa, 2010) than it is now, it became effectively extinct in Earth’s mantle after less than about 3 Gyr. This has left the other three isotopes to produce the radiogenic heat that helps sustain Earth’s present geological activity. With a half-life comparable to the ...
... Amelin et al., 2002; Bouvier and Wadhwa, 2010) than it is now, it became effectively extinct in Earth’s mantle after less than about 3 Gyr. This has left the other three isotopes to produce the radiogenic heat that helps sustain Earth’s present geological activity. With a half-life comparable to the ...
Astronomical Filters on Skynet Telescopes
... example being the temperature of a star. Cooler stars look redder, and hotter stars look bluer. By quantifying how red or blue a star looks, we can relate this measurement to its temperature, which can then give us some insight into other properties like its mass and age. What filters do and how the ...
... example being the temperature of a star. Cooler stars look redder, and hotter stars look bluer. By quantifying how red or blue a star looks, we can relate this measurement to its temperature, which can then give us some insight into other properties like its mass and age. What filters do and how the ...
sections 16-18 instructor notes
... Jones, MNRAS, 190, 591, 1980; Heck & Lakaye, MNRAS, 184, 17, 1978; see Stothers, ApJ, 274, 20, 1983), which are too distant for direct measurement of their distances by standard techniques. Both classes of object are also relatively uncommon in terms of their local space densities, yet luminous enou ...
... Jones, MNRAS, 190, 591, 1980; Heck & Lakaye, MNRAS, 184, 17, 1978; see Stothers, ApJ, 274, 20, 1983), which are too distant for direct measurement of their distances by standard techniques. Both classes of object are also relatively uncommon in terms of their local space densities, yet luminous enou ...
the chanukah comet
... what the skies will look from the Giza Pyramids in Egypt. The imagery will depict comet ISON as the 1 st ‘candle lit by the Sun as the Shamash in a ‘Celestial Chanukah Menorah’ as Antares comes above the horizon. This alignment of ISON occurring at this precise place and at this precise time clearly ...
... what the skies will look from the Giza Pyramids in Egypt. The imagery will depict comet ISON as the 1 st ‘candle lit by the Sun as the Shamash in a ‘Celestial Chanukah Menorah’ as Antares comes above the horizon. This alignment of ISON occurring at this precise place and at this precise time clearly ...
Atmospheric biomarkers on terrestrial exoplanets Abstract Introduction
... ozone destruction, directly by photolysis, but mostly indirectly due to the increased photochemical production of highly reactive radicals. For atmospheric compositions similar to the Earth’s, numerical simulations show a quantity of O increasing with the UV flux (Selsis, 2000). This property could ...
... ozone destruction, directly by photolysis, but mostly indirectly due to the increased photochemical production of highly reactive radicals. For atmospheric compositions similar to the Earth’s, numerical simulations show a quantity of O increasing with the UV flux (Selsis, 2000). This property could ...
astrophysics - Collegiate Quiz Bowl Packet
... 12. In mathematics, a three-dimensional field of this type can have a divergence and a curl, but not a gradient. In biology, it describes an agent that transmits a disease to other organisms. Examples in physics include dipole moment, electric field, and velocity. FTP, identify this word which in ph ...
... 12. In mathematics, a three-dimensional field of this type can have a divergence and a curl, but not a gradient. In biology, it describes an agent that transmits a disease to other organisms. Examples in physics include dipole moment, electric field, and velocity. FTP, identify this word which in ph ...
Habitability: Good, Bad and the Ugly
... • Terrestrial planets – heat mostly from Sun • Jovian planets – 2/3 of heat from interior (all planets originally had internal heat source due to bombardment) • Heat from Sun is inversely proportional to (distance)2 (=1/(distance)2 • Heat falls off rapidly with distance ...
... • Terrestrial planets – heat mostly from Sun • Jovian planets – 2/3 of heat from interior (all planets originally had internal heat source due to bombardment) • Heat from Sun is inversely proportional to (distance)2 (=1/(distance)2 • Heat falls off rapidly with distance ...
Spring Constellations
... centaur’s front hooves, Rigil Kentaurus and Hadar, also called ά- and β-Centauri. Our closest neighbor, Proxima Centauri, a red dwarf star 4 LY away, is due south of alpha Centauri. It’s so faint that it can’t be seen with the naked eye. It’s only about 5 times larger than the earth. ...
... centaur’s front hooves, Rigil Kentaurus and Hadar, also called ά- and β-Centauri. Our closest neighbor, Proxima Centauri, a red dwarf star 4 LY away, is due south of alpha Centauri. It’s so faint that it can’t be seen with the naked eye. It’s only about 5 times larger than the earth. ...
