Lyman-α observations of astrospheres
... is heated by the charge-exchange reactions. IBEX results (McComas et al., 2012) indicate that the inflow velocity of the LISM is likely too slow to produce a bow shock, however Scherer and Fichtner (2014) argue that inclusion of inflowing He+ ions yields Alfvén and fast magnetosonic speeds slower th ...
... is heated by the charge-exchange reactions. IBEX results (McComas et al., 2012) indicate that the inflow velocity of the LISM is likely too slow to produce a bow shock, however Scherer and Fichtner (2014) argue that inclusion of inflowing He+ ions yields Alfvén and fast magnetosonic speeds slower th ...
TOPS: Toward Other Planetary
... crack” between astrophysical and planetary studies. Several meetings were held in 1988 and 1989 to review the state of knowledge and the prospects for future work, leading to a 1-week workshop in January 1990. The theme “Toward Other Planetary Systems” (TOPS) became the name of the workshop. The out ...
... crack” between astrophysical and planetary studies. Several meetings were held in 1988 and 1989 to review the state of knowledge and the prospects for future work, leading to a 1-week workshop in January 1990. The theme “Toward Other Planetary Systems” (TOPS) became the name of the workshop. The out ...
honors earth science - Grosse Pointe Public School System
... Touring our Solar System- chapter 21 1.Recognize objects in our solar system 2. Describe characteristics of Terrestrial planets. 3. Explain the formation of planets in our solar system 4. Explain the cause of a meteor shower 5. Describe what causes a comet’s tail to change 6. Define a planet. Use th ...
... Touring our Solar System- chapter 21 1.Recognize objects in our solar system 2. Describe characteristics of Terrestrial planets. 3. Explain the formation of planets in our solar system 4. Explain the cause of a meteor shower 5. Describe what causes a comet’s tail to change 6. Define a planet. Use th ...
A cloaking device for transiting planets
... their presence through transits by constructing large, thin artificial structures, such as a triangular mask, in a tight orbit around their host star. The transit profiles of such objects would display residuals to the assumed spherical planet model, of the order of 10−4 . A related concept using mi ...
... their presence through transits by constructing large, thin artificial structures, such as a triangular mask, in a tight orbit around their host star. The transit profiles of such objects would display residuals to the assumed spherical planet model, of the order of 10−4 . A related concept using mi ...
Continuous Spectrum—Kirchoff`s First Law
... This plot shows us that the main sequence is a mass sequence. The more massive a main sequence star is, the brighter and hotter it is. To understand this, we will consider the physics that goes on inside of stars. For the moment, we will just take it as a fact that we have determined observationally ...
... This plot shows us that the main sequence is a mass sequence. The more massive a main sequence star is, the brighter and hotter it is. To understand this, we will consider the physics that goes on inside of stars. For the moment, we will just take it as a fact that we have determined observationally ...
Betelgeuse
... derived from the Arabic word bat aldshauzâ, which means “the giant’s shoulder.” or “armpit” 8.5 million yrs old (Sun is 4.6 billion yrs old) 600 light years away 1000 times bigger than the Sun ...
... derived from the Arabic word bat aldshauzâ, which means “the giant’s shoulder.” or “armpit” 8.5 million yrs old (Sun is 4.6 billion yrs old) 600 light years away 1000 times bigger than the Sun ...
Notes for Class 7, March 2
... Life on Other Planets? • Planets around other stars? • We are finding other stars with planets o Present techniques best for planets close to star o So far, too close to star, too hot o If planets around other stars are common, maybe there will be some planets with the right conditions, and maybe s ...
... Life on Other Planets? • Planets around other stars? • We are finding other stars with planets o Present techniques best for planets close to star o So far, too close to star, too hot o If planets around other stars are common, maybe there will be some planets with the right conditions, and maybe s ...
Section 3.5 The Earth, Moon, and Sun
... is a remarkable result. It occurs because the force of gravity is exactly proportional to one divided by the square of the distance between the sun and the earth, an observation that we’ll cover in Section 5.3. Any other type of centripetal force would still create orbits, but these orbits wouldn’t ...
... is a remarkable result. It occurs because the force of gravity is exactly proportional to one divided by the square of the distance between the sun and the earth, an observation that we’ll cover in Section 5.3. Any other type of centripetal force would still create orbits, but these orbits wouldn’t ...
the Colours of rainbow the Brook
... Summary:- The poem, “ Stars Speak to Man” has been written by “ Abdul Ahad Azad and translated from the Kashmiri by “ G.R. Malik”. In this poem the poet says that God has bestowed man with the power of reasoning but he chose to become destroyer of humanity because of his insensitive nature. God had ...
... Summary:- The poem, “ Stars Speak to Man” has been written by “ Abdul Ahad Azad and translated from the Kashmiri by “ G.R. Malik”. In this poem the poet says that God has bestowed man with the power of reasoning but he chose to become destroyer of humanity because of his insensitive nature. God had ...
THe SCieNCe OF ASTrONOMY
... Astronomy has been called the oldest of the sciences, because its roots stretch deepest into antiquity. Ancient civilizations did not always practice astronomy in the same ways or for the same reasons that we study it today, but they nonetheless had some amazing achievements. Understanding this anci ...
... Astronomy has been called the oldest of the sciences, because its roots stretch deepest into antiquity. Ancient civilizations did not always practice astronomy in the same ways or for the same reasons that we study it today, but they nonetheless had some amazing achievements. Understanding this anci ...
Solution
... False. By Wien's Law, since red is a longer wavelength than yellow, the surface temperature of the red one must be smaller. But by Stefan-Boltzmann's Law, its luminosity/area must also be smaller, and they are the same size. So the red one is less luminous. 3. ( T F ) Using parallax, astronomers can ...
... False. By Wien's Law, since red is a longer wavelength than yellow, the surface temperature of the red one must be smaller. But by Stefan-Boltzmann's Law, its luminosity/area must also be smaller, and they are the same size. So the red one is less luminous. 3. ( T F ) Using parallax, astronomers can ...
Astonomy-Space The Final Frontier
... radiation? How are they related to one another? How do they help us to learn about the universe in which we live? What were the major discoveries that Galileo made concerning the planets? What are the three main types of telescopes? Under what circumstances are they used? ...
... radiation? How are they related to one another? How do they help us to learn about the universe in which we live? What were the major discoveries that Galileo made concerning the planets? What are the three main types of telescopes? Under what circumstances are they used? ...
19. Our Galaxy 19.1 The Milky Way Revealed Our goals for learning
... • What is the significance of a rotation curve that is flat at large distances from the galactic center? • The Milky Way’s flat rotation curve implies that the matter associated with our galaxy extends to large distances from the center. A rotation curve is a plot of the orbital speed of stars or ga ...
... • What is the significance of a rotation curve that is flat at large distances from the galactic center? • The Milky Way’s flat rotation curve implies that the matter associated with our galaxy extends to large distances from the center. A rotation curve is a plot of the orbital speed of stars or ga ...
Chapter 30: Stars
... light is shined through a prism. This rainbow is a spectrum, which is visible light arranged according to wavelengths. There are three types of spectra: continuous, emission, and absorption, as shown in Figure 30-8. All three types will be discussed on the next few pages. A spectrum that has no brea ...
... light is shined through a prism. This rainbow is a spectrum, which is visible light arranged according to wavelengths. There are three types of spectra: continuous, emission, and absorption, as shown in Figure 30-8. All three types will be discussed on the next few pages. A spectrum that has no brea ...
Volcanoes and Igneous Activity Earth
... • Volcanic-like activity • Composed largely of water ice, covered with layers of solid nitrogen and methane ...
... • Volcanic-like activity • Composed largely of water ice, covered with layers of solid nitrogen and methane ...
Constraints on the Birth Aggregate of the Solar System
... additional lines below the main part of the table, we also present the cross sections for planetary escapes and captures separately. For each cross section listed in Table 1, we also provide the one standard deviation error estimate for the Monte Carlo integral; this quantity provides a rough indica ...
... additional lines below the main part of the table, we also present the cross sections for planetary escapes and captures separately. For each cross section listed in Table 1, we also provide the one standard deviation error estimate for the Monte Carlo integral; this quantity provides a rough indica ...
GMRT search for 150 MHz radio emission from the transiting
... corrections using 3C48, gain and phase variations of individual antennas were quantified and used for calibrating the flux density, bandpass, gain, and phase for the target field data. For 3C48 we took a flux density of 64.4 Jy at 150 MHz (Perley & Taylor 1999). The calibrated flux densities toward ...
... corrections using 3C48, gain and phase variations of individual antennas were quantified and used for calibrating the flux density, bandpass, gain, and phase for the target field data. For 3C48 we took a flux density of 64.4 Jy at 150 MHz (Perley & Taylor 1999). The calibrated flux densities toward ...
Understanding Precession of the Equinox
... If one assumes the cause of the equinoctial point slipping backward around the Earth’s orbit path at a rate of 50.29 arc seconds per year is due simply to the Earth wobbling at this exact same rate, then one must look deeper and realize that this implies the barycenter (center of mass) of the Earth ...
... If one assumes the cause of the equinoctial point slipping backward around the Earth’s orbit path at a rate of 50.29 arc seconds per year is due simply to the Earth wobbling at this exact same rate, then one must look deeper and realize that this implies the barycenter (center of mass) of the Earth ...
Astronomy - Great Smoky Mountains Institute at Tremont
... floating around between the planets? (Of course not. As far apart as the planets are from each other, there’s nothing of comparable size between them. Even the Asteroid Belt, between Mars and Jupiter, is so small that it would seem like a collection of dust in this model.) Because the Sun is the big ...
... floating around between the planets? (Of course not. As far apart as the planets are from each other, there’s nothing of comparable size between them. Even the Asteroid Belt, between Mars and Jupiter, is so small that it would seem like a collection of dust in this model.) Because the Sun is the big ...
Lecture18
... Extrasolar planets Many hundreds now known! Very difficult to detect (star much much brighter)... indirect “wobble” methods used based on velocity (Doppler shift) or position (Astrometry) of the star, “transits” (planet blocks starlight). Which detection method can be used depends on orientation of ...
... Extrasolar planets Many hundreds now known! Very difficult to detect (star much much brighter)... indirect “wobble” methods used based on velocity (Doppler shift) or position (Astrometry) of the star, “transits” (planet blocks starlight). Which detection method can be used depends on orientation of ...
Document
... abundances as low as [Fe/H] ~ –5. These are thought to be due to the separation of gas and dust beyond the stellar surface followed by an accretion of the dust-depleted gas. Thus the iron abundances are artifically low, but the Carbon, Oxygen, and Nitrogen abundance is only about [X/Fe] ~ –2. So thi ...
... abundances as low as [Fe/H] ~ –5. These are thought to be due to the separation of gas and dust beyond the stellar surface followed by an accretion of the dust-depleted gas. Thus the iron abundances are artifically low, but the Carbon, Oxygen, and Nitrogen abundance is only about [X/Fe] ~ –2. So thi ...
T
... The long-term precision of the instrument cannot be checked easily because it requires a long time base on one hand, and the knowledge of stable stellar sources on the other hand. Especially the latter point represents a new challenge since the intrinsic stability of the stars has never been studied ...
... The long-term precision of the instrument cannot be checked easily because it requires a long time base on one hand, and the knowledge of stable stellar sources on the other hand. Especially the latter point represents a new challenge since the intrinsic stability of the stars has never been studied ...
1 solar and stellar abundances of the elements
... represents the primordial composition of the solar system. The compositions of other stars may differ. A considerable body of astronomical evidence indicates that the stars in the neighborhood of the sun differ in age. Highly luminous stars transmute hydrogen into helium to produce energy at such a ...
... represents the primordial composition of the solar system. The compositions of other stars may differ. A considerable body of astronomical evidence indicates that the stars in the neighborhood of the sun differ in age. Highly luminous stars transmute hydrogen into helium to produce energy at such a ...
CHEOPS Science Requirements Document
... opening the door to actual characterization of exoplanets not only in terms of physical parameters but also in terms of understanding their diversity by better constraining their formation mechanisms and their evolutions. In our solar system, giant planets (Jupiter, Saturn, Uranus, Neptune) are loca ...
... opening the door to actual characterization of exoplanets not only in terms of physical parameters but also in terms of understanding their diversity by better constraining their formation mechanisms and their evolutions. In our solar system, giant planets (Jupiter, Saturn, Uranus, Neptune) are loca ...
Atoms and Stars IST 3360 and IST 1990
... • 2005 “Xena” with moon “Gabrielle” o ~ 20% larger than Pluto, 39 to 97 AU (very flattened) o Plane ~ 43° to ecliptic ...
... • 2005 “Xena” with moon “Gabrielle” o ~ 20% larger than Pluto, 39 to 97 AU (very flattened) o Plane ~ 43° to ecliptic ...
Planetary habitability
Planetary habitability is the measure of a planet's or a natural satellite's potential to develop and sustain life. Life may develop directly on a planet or satellite or be transferred to it from another body, a theoretical process known as panspermia. As the existence of life beyond Earth is unknown, planetary habitability is largely an extrapolation of conditions on Earth and the characteristics of the Sun and Solar System which appear favourable to life's flourishing—in particular those factors that have sustained complex, multicellular organisms and not just simpler, unicellular creatures. Research and theory in this regard is a component of planetary science and the emerging discipline of astrobiology.An absolute requirement for life is an energy source, and the notion of planetary habitability implies that many other geophysical, geochemical, and astrophysical criteria must be met before an astronomical body can support life. In its astrobiology roadmap, NASA has defined the principal habitability criteria as ""extended regions of liquid water, conditions favourable for the assembly of complex organic molecules, and energy sources to sustain metabolism.""In determining the habitability potential of a body, studies focus on its bulk composition, orbital properties, atmosphere, and potential chemical interactions. Stellar characteristics of importance include mass and luminosity, stable variability, and high metallicity. Rocky, terrestrial-type planets and moons with the potential for Earth-like chemistry are a primary focus of astrobiological research, although more speculative habitability theories occasionally examine alternative biochemistries and other types of astronomical bodies.The idea that planets beyond Earth might host life is an ancient one, though historically it was framed by philosophy as much as physical science. The late 20th century saw two breakthroughs in the field. The observation and robotic spacecraft exploration of other planets and moons within the Solar System has provided critical information on defining habitability criteria and allowed for substantial geophysical comparisons between the Earth and other bodies. The discovery of extrasolar planets, beginning in the early 1990s and accelerating thereafter, has provided further information for the study of possible extraterrestrial life. These findings confirm that the Sun is not unique among stars in hosting planets and expands the habitability research horizon beyond the Solar System.The chemistry of life may have begun shortly after the Big Bang, 13.8 billion years ago, during a habitable epoch when the Universe was only 10–17 million years old. According to the panspermia hypothesis, microscopic life—distributed by meteoroids, asteroids and other small Solar System bodies—may exist throughout the universe. Nonetheless, Earth is the only place in the universe known to harbor life. Estimates of habitable zones around other stars, along with the discovery of hundreds of extrasolar planets and new insights into the extreme habitats here on Earth, suggest that there may be many more habitable places in the universe than considered possible until very recently. On 4 November 2013, astronomers reported, based on Kepler space mission data, that there could be as many as 40 billion Earth-sized planets orbiting in the habitable zones of Sun-like stars and red dwarfs within the Milky Way. 11 billion of these estimated planets may be orbiting Sun-like stars. The nearest such planet may be 12 light-years away, according to the scientists.