Counting Sunspots - Lunar and Planetary Institute
... Sunspots can last for weeks or even months. The average number of spots that can be seen on the face of the Sun is not always the same, but goes up and down in a cycle. Historical records of Games sunspot counts show that this sunspot cycle has an average period of about eleven years. The 11 year su ...
... Sunspots can last for weeks or even months. The average number of spots that can be seen on the face of the Sun is not always the same, but goes up and down in a cycle. Historical records of Games sunspot counts show that this sunspot cycle has an average period of about eleven years. The 11 year su ...
A GMOS dissection of the line-of
... Statistical properties of high-z radio quasars may be more useful in determining importance of lensing ...
... Statistical properties of high-z radio quasars may be more useful in determining importance of lensing ...
Power Point Presentation
... Change in 5 s spin rate leads to measure of magnetic field Source is a magnetar! March 11, 2003 ...
... Change in 5 s spin rate leads to measure of magnetic field Source is a magnetar! March 11, 2003 ...
Carbon, nitrogen and oxygen abundances in
... 8.31 ± 0.13, log (N) = 7.80 ± 0.12 and log (O) = 8.73 ± 0.13. These values are in very good agreement with recent data on the C, N and O abundances for nearby B stars from other authors; it is important that different techniques are applied by us and other authors. When excluding for the stars HR ...
... 8.31 ± 0.13, log (N) = 7.80 ± 0.12 and log (O) = 8.73 ± 0.13. These values are in very good agreement with recent data on the C, N and O abundances for nearby B stars from other authors; it is important that different techniques are applied by us and other authors. When excluding for the stars HR ...
The quest for the size of the universe in early relativistic cosmology
... path, now in the new framework of relativistic cosmology, of directly estimating R by using several astronomical objects, which, by their intention, played the role of distance indicators. Going beyond Einstein’s first attempt, these authors used either observations of stars, or assumptions on the m ...
... path, now in the new framework of relativistic cosmology, of directly estimating R by using several astronomical objects, which, by their intention, played the role of distance indicators. Going beyond Einstein’s first attempt, these authors used either observations of stars, or assumptions on the m ...
Document
... • LOD is increasing, t is decreasing. • Angular momentum of Earth-Moon system is being transferred to the Moon, causing an increase of Earth-Moon distance and of lunar sidereal period. • Cumulative effect is ~3¼ h over 2000 yr. • Ancient data from lunar and solar eclipse records (whether timed or u ...
... • LOD is increasing, t is decreasing. • Angular momentum of Earth-Moon system is being transferred to the Moon, causing an increase of Earth-Moon distance and of lunar sidereal period. • Cumulative effect is ~3¼ h over 2000 yr. • Ancient data from lunar and solar eclipse records (whether timed or u ...
4373 - Zuber, M. T., H. Y. McSween Jr., R. P. Binzel, L. T. Elkins
... been intruded by plutons arising from mantle melting. Constraints on the asteroid’s moments of inertia from the long-wavelength gravity field, pole position and rotation, informed by bulk composition estimates, allow tradeoffs between mantle density and core size; cores of up to half the planetary r ...
... been intruded by plutons arising from mantle melting. Constraints on the asteroid’s moments of inertia from the long-wavelength gravity field, pole position and rotation, informed by bulk composition estimates, allow tradeoffs between mantle density and core size; cores of up to half the planetary r ...
The Role of Radioactive Isotopes in Astrophysics
... had been created in previous massive stars, thereby seeding the interstellar matter with primary elements. These seed nuclei are required in order that secondary nuclei be produced from them in stars. He emphasized especially 14 N, 18 O, 19 F and 22 Ne in that regard, each of which depends on initia ...
... had been created in previous massive stars, thereby seeding the interstellar matter with primary elements. These seed nuclei are required in order that secondary nuclei be produced from them in stars. He emphasized especially 14 N, 18 O, 19 F and 22 Ne in that regard, each of which depends on initia ...
Euler: Genius Blind Astronomer Mathematician
... Three years later, Euler dealt with the motion of planets and their orbits, in which he developed an iterative method of solution for Kepler’s problem. When his vision began to fail him, Euler stopped his daily routine at the observatory. However, he continued his research to derive the mathematical ...
... Three years later, Euler dealt with the motion of planets and their orbits, in which he developed an iterative method of solution for Kepler’s problem. When his vision began to fail him, Euler stopped his daily routine at the observatory. However, he continued his research to derive the mathematical ...
Markov Chain Monte Carlo Modeling of High-Redshift Quasar
... Quasars were first recognized as optically-luminous extragalactic objects by Maarten Schmidt (1963) from the optical spectrum of a variable star-like object coincident with the radio source 3C 273. It was found to have a blue non-thermal power-law continuum spectrum Fν ∝ ν 0.28 (Oke 1963), where Fν ...
... Quasars were first recognized as optically-luminous extragalactic objects by Maarten Schmidt (1963) from the optical spectrum of a variable star-like object coincident with the radio source 3C 273. It was found to have a blue non-thermal power-law continuum spectrum Fν ∝ ν 0.28 (Oke 1963), where Fν ...
Tracing the Evolution and Impact of the Stellar Winds
... For example, stellar wind creates excess emission in the radio wavelengths through free-free or Bremsstrahlung emission caused through interaction between charged particles, which are plentiful in a stellar wind. However, the signal in the radio is quite small, so is only useful when detecting very ...
... For example, stellar wind creates excess emission in the radio wavelengths through free-free or Bremsstrahlung emission caused through interaction between charged particles, which are plentiful in a stellar wind. However, the signal in the radio is quite small, so is only useful when detecting very ...
David AJ Seargent
... account of observed phenomena. Yet, at other times a theory looks good but simply does not jell with the general line of thinking at the time. Sometimes, theories of this type eventually have their day in the Sun as evidence in their favor mounts and/or attitudes change within the scientific communi ...
... account of observed phenomena. Yet, at other times a theory looks good but simply does not jell with the general line of thinking at the time. Sometimes, theories of this type eventually have their day in the Sun as evidence in their favor mounts and/or attitudes change within the scientific communi ...
Einstein`s Lens presentation (PC)
... http://www.universeforum.org/einstein/ http://www.universeforum.org/einstein/ http://www.universeforum.org/einstein/ ...
... http://www.universeforum.org/einstein/ http://www.universeforum.org/einstein/ http://www.universeforum.org/einstein/ ...
Where stars form: inside-out growth and coherent star formation from
... scaffolding of this project upon which all the remaining data products rest. For this study, we rely on the rest-frame colors, stellar masses, and star formation rates. All of these quantities were derived based on constraints from across the electromagnetic spectrum. Our redshift fitting method als ...
... scaffolding of this project upon which all the remaining data products rest. For this study, we rely on the rest-frame colors, stellar masses, and star formation rates. All of these quantities were derived based on constraints from across the electromagnetic spectrum. Our redshift fitting method als ...
the saptarishis calendar: `the indian tropical zodiac`!
... equinoxes, it is possible that Vriddha Garga was none other than Ptolemy. Since Varahamihira does not take responsibility for what he says in the Brihat Samhita about the Seven Sages it is clear that either he had doubts about it or it was not well understood by him. Therefore Varahamihira‘s account ...
... equinoxes, it is possible that Vriddha Garga was none other than Ptolemy. Since Varahamihira does not take responsibility for what he says in the Brihat Samhita about the Seven Sages it is clear that either he had doubts about it or it was not well understood by him. Therefore Varahamihira‘s account ...
A physical interpretation of the `red Sirius` anomaly
... interstellar extinction (Section 3.1). Both Rayleigh and aerosol components of atmospheric extinction scale in proportion to exp 2h=H, where h is the altitude of the observer and H is the appropriate scaleheight: typical values of H for Rayleigh and aerosol extinction are 8 and 1.5 km, respectively ...
... interstellar extinction (Section 3.1). Both Rayleigh and aerosol components of atmospheric extinction scale in proportion to exp 2h=H, where h is the altitude of the observer and H is the appropriate scaleheight: typical values of H for Rayleigh and aerosol extinction are 8 and 1.5 km, respectively ...
Confirmation of Hostless Type Ia Supernovae Using Hubble Space
... long-faded Type Ia supernovae (SNe Ia) in low-redshift, rich galaxy clusters that were identified in the Multi-Epoch Nearby Cluster Survey. Assuming a steep faint-end slope for the galaxy cluster luminosity function (αd = −1.5), our data includes all but . 0.2% percent of the stellar mass in cluster ...
... long-faded Type Ia supernovae (SNe Ia) in low-redshift, rich galaxy clusters that were identified in the Multi-Epoch Nearby Cluster Survey. Assuming a steep faint-end slope for the galaxy cluster luminosity function (αd = −1.5), our data includes all but . 0.2% percent of the stellar mass in cluster ...
GammaRay Bursts, the Strongest Explosions in the Universe.
... Gregory Chibisov6 suggested that GRBs could be extra galactic, making them much more powerful than if they were produced by relativity “local” Galactic objects. Note that a source at distant galaxy is million times further than a source in our own Galaxy. This would ma ...
... Gregory Chibisov6 suggested that GRBs could be extra galactic, making them much more powerful than if they were produced by relativity “local” Galactic objects. Note that a source at distant galaxy is million times further than a source in our own Galaxy. This would ma ...
9th Conference of Hel.A.S. Athens, 20
... Why the magnetic flux and the impulsive energy released in solar active regions follow a universal power law distribution? Instrumentation, observational techniques and first results from the total solar eclipse of July 22, 2009 in China ...
... Why the magnetic flux and the impulsive energy released in solar active regions follow a universal power law distribution? Instrumentation, observational techniques and first results from the total solar eclipse of July 22, 2009 in China ...