NASA`s Juno Mission to Remain in Current Orbit at Jupiter
... • This is a fine week to look for the zodiacal light if you live in the northern latitudes, now that the evening sky is moonless and the ecliptic tilts high upward from the west horizon at nightfall. From a clear, clean, wide-open dark site, look west at twilight's very end for a vague but huge, tal ...
... • This is a fine week to look for the zodiacal light if you live in the northern latitudes, now that the evening sky is moonless and the ecliptic tilts high upward from the west horizon at nightfall. From a clear, clean, wide-open dark site, look west at twilight's very end for a vague but huge, tal ...
solar twins and solar analogues in galactic surveys
... we call a solar twin a star that has the same observed parameters as the Sun within its errors. These stars can be used as stand-in suns when doing observations, as normal night-time telescopes are not built to be pointed at the Sun. There have been many searches for these twins and every one of the ...
... we call a solar twin a star that has the same observed parameters as the Sun within its errors. These stars can be used as stand-in suns when doing observations, as normal night-time telescopes are not built to be pointed at the Sun. There have been many searches for these twins and every one of the ...
Red supergiants around the obscured open cluster Stephenson 2
... “beam-switch” strategy (moving the telescope back and forth between objects and neighbouring sky). For each exposure, we moved the telescope ∼3′ in a random direction and took a sky exposure with the same integration time as each of the individual target exposures. This procedure was used during the ...
... “beam-switch” strategy (moving the telescope back and forth between objects and neighbouring sky). For each exposure, we moved the telescope ∼3′ in a random direction and took a sky exposure with the same integration time as each of the individual target exposures. This procedure was used during the ...
Disentangling degenerate solutions from primary transit and
... Here, we explore the degenerate solutions of hot Jovian exoplanets, where the mean molecular weight is assumed to be dominated by hydrogen and helium, and any surface lies too deep to be detected. These assumptions pertain to all of the exoplanets extensively measured to date, with the possible exce ...
... Here, we explore the degenerate solutions of hot Jovian exoplanets, where the mean molecular weight is assumed to be dominated by hydrogen and helium, and any surface lies too deep to be detected. These assumptions pertain to all of the exoplanets extensively measured to date, with the possible exce ...
Venus project - La Favre home page
... Venus in the telescope with one eye, look at the ruler with the other. If you concentrate, you should be able to see Venus on top of the ruler. Then you can measure the diameter of Venus. I have included a page at the end of this paper that can be used as the ruler. It is a set of heavy bars of blac ...
... Venus in the telescope with one eye, look at the ruler with the other. If you concentrate, you should be able to see Venus on top of the ruler. Then you can measure the diameter of Venus. I have included a page at the end of this paper that can be used as the ruler. It is a set of heavy bars of blac ...
Galaxies Astronomy 1 — Elementary Astronomy LA Mission College Spring F2015
... A. never had blue stars in the galaxy. B. had blue stars that are not present anymore but were at one time long ago. C. has been around long enough for blue stars to all evolve into the red main sequence stars we see. D. never contained enough gas to have blue stars develop. E. as blue stars that ar ...
... A. never had blue stars in the galaxy. B. had blue stars that are not present anymore but were at one time long ago. C. has been around long enough for blue stars to all evolve into the red main sequence stars we see. D. never contained enough gas to have blue stars develop. E. as blue stars that ar ...
TECHNICAL REPORT
... emission by observing the dip in the mid-infrared light curve as the planet passes behind its host star. Extra-solar giant planets typically emit ~1% of the mid-infrared emission measured from the aggregate system; therefore, very high signal-to-noise (SNR), timeseries observations are needed to dis ...
... emission by observing the dip in the mid-infrared light curve as the planet passes behind its host star. Extra-solar giant planets typically emit ~1% of the mid-infrared emission measured from the aggregate system; therefore, very high signal-to-noise (SNR), timeseries observations are needed to dis ...
Slide 1
... 2nd Workshop in Brussels. Sarychev & Roshchina report in Solar Sys. Res. 2009, 43: “There is evidence that the Greenwich values obtained before 1880 and the Hoyt–Schatten series of Rg before 1908 are incorrect”. ...
... 2nd Workshop in Brussels. Sarychev & Roshchina report in Solar Sys. Res. 2009, 43: “There is evidence that the Greenwich values obtained before 1880 and the Hoyt–Schatten series of Rg before 1908 are incorrect”. ...
On the interpretation of stellar disc observations in terms of diameters
... an almost saturated absorption feature, respectively, in the spectrum that is formed by diminishing the number of emerging continuum photons in a semi-opaque layer while photons from this layer contribute only a small fraction of the observed intensity and observed flux. If the star were observed in ...
... an almost saturated absorption feature, respectively, in the spectrum that is formed by diminishing the number of emerging continuum photons in a semi-opaque layer while photons from this layer contribute only a small fraction of the observed intensity and observed flux. If the star were observed in ...
Astronomy Astrophysics NGC 7419 as a template for red supergiant clusters &
... with the 1. 0 slit is R ∼ 800. Even though this grism does not include the region of Hα, it has a much higher throughput in the blue than grism #7, and it was thus preferred to obtain classification spectra for faint stars. Finally, in the 2010 service observations, two objects were observed with ...
... with the 1. 0 slit is R ∼ 800. Even though this grism does not include the region of Hα, it has a much higher throughput in the blue than grism #7, and it was thus preferred to obtain classification spectra for faint stars. Finally, in the 2010 service observations, two objects were observed with ...
Surface Gravity as a Diagnostic ... Youth Cameron Higby-Naquin Advisor: Eric Jensen
... amounts of time to form, and to fully grasp the formation process, physical properties of the star must be determined. Age cannot be the only criterion for the classification of young stars. It is often more useful to categorize stars by their stage of development. A star's physical characteristics, ...
... amounts of time to form, and to fully grasp the formation process, physical properties of the star must be determined. Age cannot be the only criterion for the classification of young stars. It is often more useful to categorize stars by their stage of development. A star's physical characteristics, ...
PowerPoint Presentation - 16. Properties of Stars
... humans age by observing the humans living in a village at one time. • What two basic physical properties do astronomers use to classify stars? • Stars are classified by their luminosity and surface temperature. These properties, in turn, depend primarily on a star’s mass and its stage of life. ...
... humans age by observing the humans living in a village at one time. • What two basic physical properties do astronomers use to classify stars? • Stars are classified by their luminosity and surface temperature. These properties, in turn, depend primarily on a star’s mass and its stage of life. ...
19.
... thick cloud coverage that prevents optical observation of the planet's surface. The surface of Venus remained hidden until 1978 when the Pioneer Venus 1 spacecraft arrived and went into orbit about the planet on December 4th. The spacecraft used radar to map planet's surface, revealing a new Venus. ...
... thick cloud coverage that prevents optical observation of the planet's surface. The surface of Venus remained hidden until 1978 when the Pioneer Venus 1 spacecraft arrived and went into orbit about the planet on December 4th. The spacecraft used radar to map planet's surface, revealing a new Venus. ...
TWO NEW LONG-PERIOD GIANT PLANETS FROM THE
... Moutou et al. 2015). An example of a Jupiter-analog planet orbiting a solar twin is presented in Bedell et al. (2015). While the Kepler mission has revolutionized exoplanetary science and provided a first estimate of the frequency of Earth-size planets in Earth-like orbits, long-term RV surveys compl ...
... Moutou et al. 2015). An example of a Jupiter-analog planet orbiting a solar twin is presented in Bedell et al. (2015). While the Kepler mission has revolutionized exoplanetary science and provided a first estimate of the frequency of Earth-size planets in Earth-like orbits, long-term RV surveys compl ...
Unlocking the secrets of stellar haloes using combined star counts
... In recent years, most attempts to trace the surface brightness profiles of stellar haloes have been based on direct star counts, i.e. by counting the number of bright halo stars (red giant branch stars, asymptotic giant branch stars and upper main sequence stars) within a certain area. The bright st ...
... In recent years, most attempts to trace the surface brightness profiles of stellar haloes have been based on direct star counts, i.e. by counting the number of bright halo stars (red giant branch stars, asymptotic giant branch stars and upper main sequence stars) within a certain area. The bright st ...
WFC3 Science White Paper - Space Telescope Science Institute
... imaging capabilities, WFC3 should provide high sensitivity and large field of view (FOV) in the near-UV and near-IR bands; (3) as a pathfinder for NGST, WFC3 will help refine the questions that NGST will answer by providing complementary UV data and the highest near-IR sensitivity available before N ...
... imaging capabilities, WFC3 should provide high sensitivity and large field of view (FOV) in the near-UV and near-IR bands; (3) as a pathfinder for NGST, WFC3 will help refine the questions that NGST will answer by providing complementary UV data and the highest near-IR sensitivity available before N ...
Ch17_Galaxies
... cluster sizes to 100 times the mass of the Milky Way – Census of galaxies nearby: Most are dim dwarf E and dwarf Irr sparsely populated with stars – Census of distant galaxies: In clusters, 60% of members are spirals and S0, while in sparsely populated regions it is 80% – Early (very young) galaxies ...
... cluster sizes to 100 times the mass of the Milky Way – Census of galaxies nearby: Most are dim dwarf E and dwarf Irr sparsely populated with stars – Census of distant galaxies: In clusters, 60% of members are spirals and S0, while in sparsely populated regions it is 80% – Early (very young) galaxies ...
The evolution of organic matter in space
... triple-a process (3 × 4 He → 12 C) in the cores of stars is the fundamental source of carbon, the basis of organic chemistry. After hydrogen is exhausted, further nuclear reactions start in the core of stars with masses greater than half a solar mass leading to carbon and heavier elements, and up to ...
... triple-a process (3 × 4 He → 12 C) in the cores of stars is the fundamental source of carbon, the basis of organic chemistry. After hydrogen is exhausted, further nuclear reactions start in the core of stars with masses greater than half a solar mass leading to carbon and heavier elements, and up to ...
RTICC Rapid Terrestrial Imaging CubeSat Constellation
... The Walker constellation involves a loss of coverage near the poles, but allows a reduction in the total number of spacecraft because of the better distribution at lower latitudes. The Walker configuration redistributes coverage by halving the number of spacecraft per plane and almost doubling the ...
... The Walker constellation involves a loss of coverage near the poles, but allows a reduction in the total number of spacecraft because of the better distribution at lower latitudes. The Walker configuration redistributes coverage by halving the number of spacecraft per plane and almost doubling the ...
The first focused hard X-ray images of the sun with
... flare giving the same count rate as the background is a million times fainter for NuSTAR than for RHESSI. While interpreting this FoM in terms of the sensitivity of the two fundamentally different types of instruments is far from trivial, this does demonstrate the power of focusing optics. There are, ...
... flare giving the same count rate as the background is a million times fainter for NuSTAR than for RHESSI. While interpreting this FoM in terms of the sensitivity of the two fundamentally different types of instruments is far from trivial, this does demonstrate the power of focusing optics. There are, ...
Nucleosynthesis and Chemical Evolution of Oxygen
... only one particular model, its yields are fairly representative of the ejecta from any star more than ten times the mass of the Sun. Chemical evolution models using detailed stellar model yields have long shown that the Galaxy’s supply 16O is dominantly from massive stars (e.g., B. M. Tinsley 1980—“ ...
... only one particular model, its yields are fairly representative of the ejecta from any star more than ten times the mass of the Sun. Chemical evolution models using detailed stellar model yields have long shown that the Galaxy’s supply 16O is dominantly from massive stars (e.g., B. M. Tinsley 1980—“ ...
International Ultraviolet Explorer
The International Ultraviolet Explorer (IUE) was an astronomical observatory satellite primarily designed to take ultraviolet spectra. The satellite was a collaborative project between NASA, the UK Science Research Council and the European Space Agency (ESA). The mission was first proposed in early 1964, by a group of scientists in the United Kingdom, and was launched on January 26, 1978 aboard a NASA Delta rocket. The mission lifetime was initially set for 3 years, but in the end it lasted almost 18 years, with the satellite being shut down in 1996. The switch-off occurred for financial reasons, while the telescope was still functioning at near original efficiency.It was the first space observatory to be operated in real time by astronomers who visited the groundstations in the United States and Europe. Astronomers made over 104,000 observations using the IUE, of objects ranging from solar system bodies to distant quasars. Among the significant scientific results from IUE data were the first large scale studies of stellar winds, accurate measurements of the way interstellar dust absorbs light, and measurements of the supernova SN1987A which showed that it defied stellar evolution theories as they then stood. When the mission ended, it was considered the most successful astronomical satellite ever.