Can Gravity Explain the Pioneer 10-11 Anomaly
... • A fully relativistic modified gravity (MOG) called Scalar-TensorVector-Gravity (STVG) leads to a self-consistent, stable gravity theory that can describe solar system, astrophysical and cosmological data. The theory has an extra degree of freedom, a vector field called a “phion” field whose curl i ...
... • A fully relativistic modified gravity (MOG) called Scalar-TensorVector-Gravity (STVG) leads to a self-consistent, stable gravity theory that can describe solar system, astrophysical and cosmological data. The theory has an extra degree of freedom, a vector field called a “phion” field whose curl i ...
EPB_Paper1_EarlyUniverse
... heavier elements. Population I stars are composed of heavier and more diverse elements because they formed later after the big bang, therefore these elements were more abundant in the universe. However, hydrogen and helium are still by far the most abundant gases found in population I stars [9]. The ...
... heavier elements. Population I stars are composed of heavier and more diverse elements because they formed later after the big bang, therefore these elements were more abundant in the universe. However, hydrogen and helium are still by far the most abundant gases found in population I stars [9]. The ...
Earth Science 25.2B : Stellar Evolution
... diameter equal to the length of a football field. A pea size sample of this matter would weigh 100 million tons. This is approximately the density of an atomic nucleus. Neutron stars can be ...
... diameter equal to the length of a football field. A pea size sample of this matter would weigh 100 million tons. This is approximately the density of an atomic nucleus. Neutron stars can be ...
Stellar Distances and Magnitudes
... • The spectral type (class) of a star gives us temperature information, but we don’t know its luminosity. • To get the luminosity, we must know the distance! • Remember the inverse square law! ...
... • The spectral type (class) of a star gives us temperature information, but we don’t know its luminosity. • To get the luminosity, we must know the distance! • Remember the inverse square law! ...
ASTR 300 Stars and Stellar Systems Spring 2011
... of space because these stars are very rare. On the other hand, the least luminous stars are quite common, but are so faint they are hard to see even if they are close. 2. The parallax of the bright star Vega is 0.129 seconds of arc. What is the distance of Vega in parsecs ? In light-years ? We have ...
... of space because these stars are very rare. On the other hand, the least luminous stars are quite common, but are so faint they are hard to see even if they are close. 2. The parallax of the bright star Vega is 0.129 seconds of arc. What is the distance of Vega in parsecs ? In light-years ? We have ...
Pre-Main Sequence Evolution
... Collapse and Fragmentation • In general, the timescale for accretion, τ acc ~ M / M! , is shorter than the protostar’s thermal timescale. The protostar cannot thermally adjust to the added energy, and therefore heats up adiabatically. • Eventually, the protostar becomes hot enough to disassociate ...
... Collapse and Fragmentation • In general, the timescale for accretion, τ acc ~ M / M! , is shorter than the protostar’s thermal timescale. The protostar cannot thermally adjust to the added energy, and therefore heats up adiabatically. • Eventually, the protostar becomes hot enough to disassociate ...
Stars: the Hertzsprung
... star with a given mass and chemical composition – if we start with a just formed protostar of a given mass and chemical composition, we can calculate how that star will evolve over its entire life. • This is extremely useful because it greatly simplifies the study of stars and is the basic reason wh ...
... star with a given mass and chemical composition – if we start with a just formed protostar of a given mass and chemical composition, we can calculate how that star will evolve over its entire life. • This is extremely useful because it greatly simplifies the study of stars and is the basic reason wh ...
No Slide Title
... laser beam and they scatter the laser light. The scattered light is measured at right angles to the laser beam by a photodiode detector. ...
... laser beam and they scatter the laser light. The scattered light is measured at right angles to the laser beam by a photodiode detector. ...
Name: ____________ Period: ______ STAR BIOGRAPHY Name of
... *May include diagram *Talk about the birth of your star, include its age if known, what life cycle it is in, and predict what will happen in the future with your star. (Include each Life Cycle Stage) ...
... *May include diagram *Talk about the birth of your star, include its age if known, what life cycle it is in, and predict what will happen in the future with your star. (Include each Life Cycle Stage) ...
Study Guide for 3RD Astronomy Exam
... Write the properties of the stars in an eclipsing binary star system that can be determined. ...
... Write the properties of the stars in an eclipsing binary star system that can be determined. ...
Physics 200 Class #1 Outline
... Incandescent Radiation, Cavity radiation, Blackbody Radiation and Thermal radiation are all the same. The experimental facts: We plot the power radiated per unit area at each temperature. Note that the temperature must be the absolute temperature in Kelvins. To convert from centigrade, add 273. TKel ...
... Incandescent Radiation, Cavity radiation, Blackbody Radiation and Thermal radiation are all the same. The experimental facts: We plot the power radiated per unit area at each temperature. Note that the temperature must be the absolute temperature in Kelvins. To convert from centigrade, add 273. TKel ...
energy levels
... Thermal radiation: The electromagnetic emission from an object. • Covers all the spectrum. • At room temperature, the wavelengths of the radiation are mainly in the infrared. As the surface temperature increases, the wavelength shifts to red and then white. • Classical physics could not describe the ...
... Thermal radiation: The electromagnetic emission from an object. • Covers all the spectrum. • At room temperature, the wavelengths of the radiation are mainly in the infrared. As the surface temperature increases, the wavelength shifts to red and then white. • Classical physics could not describe the ...
ν - Luleå tekniska universitet
... Astrophysics Distances • Light travels with a finite speed • It takes 8 minutes to reach us from the Sun 8 years to reach us from Sirius (8 light-years away) 1,500 years to reach us from the Orion Nebula • The farther out we look into the Universe, the farther back in time we see! ...
... Astrophysics Distances • Light travels with a finite speed • It takes 8 minutes to reach us from the Sun 8 years to reach us from Sirius (8 light-years away) 1,500 years to reach us from the Orion Nebula • The farther out we look into the Universe, the farther back in time we see! ...
answers2004_05_BC - Particle Physics and Particle Astrophysics
... discovered orbiting other stars. Explain how the typical properties of these extrasolar planets differ from the properties of the planets in the solar system. most discovered planets are gas-giant-sized, but in orbits typical of our terrestrial planets (< 3AU) some planets are in orbits which ar ...
... discovered orbiting other stars. Explain how the typical properties of these extrasolar planets differ from the properties of the planets in the solar system. most discovered planets are gas-giant-sized, but in orbits typical of our terrestrial planets (< 3AU) some planets are in orbits which ar ...
here - SDSU Astronomy Department and Mount Laguna Observatory
... distance to the center, then one can find the mass of the galaxy (or at least its central parts). Modern measurements yield a mass of about 1011 solar masses for the Milky Way galaxy. ...
... distance to the center, then one can find the mass of the galaxy (or at least its central parts). Modern measurements yield a mass of about 1011 solar masses for the Milky Way galaxy. ...
Discovering the Sky at the Longest Wavelengths — Space
... • Addresses important Cosmic Vision questions • Primary multi-disciplinary science objectives – Cosmic Dark Ages using highly red-shifted 21cm emission – Birth, evolution and death of galaxies through cosmic time – The Milky Way: constituents and distribution of the ISM – Violent sky: monitori ...
... • Addresses important Cosmic Vision questions • Primary multi-disciplinary science objectives – Cosmic Dark Ages using highly red-shifted 21cm emission – Birth, evolution and death of galaxies through cosmic time – The Milky Way: constituents and distribution of the ISM – Violent sky: monitori ...
Solar nebula theory
... Theory #2: When the Sun first begins to shrink, gravitational attraction between the Earth and Sun will become less. Some scientists think the Earth may move away from the Sun as gravity no longer holds them together. If this happens, the Earth will be a cold, desolate, barren rock in space. ...
... Theory #2: When the Sun first begins to shrink, gravitational attraction between the Earth and Sun will become less. Some scientists think the Earth may move away from the Sun as gravity no longer holds them together. If this happens, the Earth will be a cold, desolate, barren rock in space. ...
Sample
... photons. Then I introduce refraction and refractive index, which leads to total internal reflection, and how it can explain light guiding in a multimode step-index optical fiber. That explanation of light guiding takes the traditional optical perspective of tracing the paths of light rays, rather th ...
... photons. Then I introduce refraction and refractive index, which leads to total internal reflection, and how it can explain light guiding in a multimode step-index optical fiber. That explanation of light guiding takes the traditional optical perspective of tracing the paths of light rays, rather th ...
It`s time to eat humble pie: latest evidence gives humans a
... particularly strong magnetic field. Ferrario says these magnetars, with their monstrous fields and violent flaring events, may shed light on other violent phenomena in the universe such as the mysterious gamma-ray bursts. One day scientists may be able to use them as standard candles to investigate ...
... particularly strong magnetic field. Ferrario says these magnetars, with their monstrous fields and violent flaring events, may shed light on other violent phenomena in the universe such as the mysterious gamma-ray bursts. One day scientists may be able to use them as standard candles to investigate ...
Chap 11 Characterizing Stars v2
... Luminosity uses the sun as a comparison -Sun Luminosity (1 L Θ)= 400 x 1024 W ...
... Luminosity uses the sun as a comparison -Sun Luminosity (1 L Θ)= 400 x 1024 W ...
Astronomical spectroscopy
Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including visible light, which radiates from stars and other hot celestial objects. Spectroscopy can be used to derive many properties of distant stars and galaxies, such as their chemical composition, temperature, density, mass, distance, luminosity, and relative motion using Doppler shift measurements.