Jupiter – Friend or Foe? IV:The influence of orbital eccentricity and
... ever-increasing number of exoplanets have been detected. Radial velocity surveys, such as HARPS (e.g. Pepe et al., 2004, Moutou et al., 2009, Mordasini et al., 2011) and the Anglo-Australian Search for Planets (e.g. Jones et al., 2002, O’Toole et al., 2009, Tinney et al., 2011) have found the great ...
... ever-increasing number of exoplanets have been detected. Radial velocity surveys, such as HARPS (e.g. Pepe et al., 2004, Moutou et al., 2009, Mordasini et al., 2011) and the Anglo-Australian Search for Planets (e.g. Jones et al., 2002, O’Toole et al., 2009, Tinney et al., 2011) have found the great ...
Signatures of Planets in Protoplanetary and Debris
... pressure scale-height of the disk. The detection / non-detection of warm dust close to the planet, however, would additionally provide valuable constraints on the temperature and luminosity of the planet, the accretion process, and the density structure of the surrounding medium. This study is motiv ...
... pressure scale-height of the disk. The detection / non-detection of warm dust close to the planet, however, would additionally provide valuable constraints on the temperature and luminosity of the planet, the accretion process, and the density structure of the surrounding medium. This study is motiv ...
mufon ufo symposium -1974
... stars like the sun. On the sun a solar flare changes the over-all output of energy very little, as there is so much total radiating surface besides the flare. On a small star, the same size flare may give off many times the star’s usual energy, destroying any life that might be on a nearby planet. T ...
... stars like the sun. On the sun a solar flare changes the over-all output of energy very little, as there is so much total radiating surface besides the flare. On a small star, the same size flare may give off many times the star’s usual energy, destroying any life that might be on a nearby planet. T ...
CAPSTONE-poster
... Our team decided to explore planetary nebulae because we wanted to know how were they formed, why they had so many colors, why they were called planetary nebulae, the significance of their names, their composition, how many possibly existed in the Milky Way galaxy, their approximate age, their first ...
... Our team decided to explore planetary nebulae because we wanted to know how were they formed, why they had so many colors, why they were called planetary nebulae, the significance of their names, their composition, how many possibly existed in the Milky Way galaxy, their approximate age, their first ...
The Digital Carousel
... Impact events: frequency / results - Tunguska sized event from 50 meter asteroid every few hundred years Asteroid defense - detection + deflection ...
... Impact events: frequency / results - Tunguska sized event from 50 meter asteroid every few hundred years Asteroid defense - detection + deflection ...
Earth and Space Science (307)
... C. contains low levels of volatile gases and erupts at a relatively high temperature. D. is andesitic and has a relatively low viscosity. Correct Response and Explanation A. This question requires the examinee to demonstrate knowledge of the characteristics of different types of volcanic activity. P ...
... C. contains low levels of volatile gases and erupts at a relatively high temperature. D. is andesitic and has a relatively low viscosity. Correct Response and Explanation A. This question requires the examinee to demonstrate knowledge of the characteristics of different types of volcanic activity. P ...
What units are used in astronomical photometry?
... Distance: Distance is an easy concept to understand: it is just a length in some units such as in feet, km, light years, parsecs etc. It has been excrutiatingly difficult to measure astronomical distances until this century. Unfortunately most stars are so far away that it is impossible to directly ...
... Distance: Distance is an easy concept to understand: it is just a length in some units such as in feet, km, light years, parsecs etc. It has been excrutiatingly difficult to measure astronomical distances until this century. Unfortunately most stars are so far away that it is impossible to directly ...
Standard Four: Earth in Space
... 2. The Earth’s atmosphere, crust, and interior have changed since the formation of the planets. Driven by internal heat (radioactive decay and heat from accretion), the Earth’s layers have separated by density into a solid core, molten mantle, and crust of solid rock composed of plates. ...
... 2. The Earth’s atmosphere, crust, and interior have changed since the formation of the planets. Driven by internal heat (radioactive decay and heat from accretion), the Earth’s layers have separated by density into a solid core, molten mantle, and crust of solid rock composed of plates. ...
Read an Excerpt!
... that “the outer region of the solar system, beyond the orbits of the planets, is occupied by a very large number of comparatively small bodies.” Edgeworth said these worlds were leftovers from the birth of the solar system. In 1951, American astronomer Gerard Kuiper suggested the same idea. For many ...
... that “the outer region of the solar system, beyond the orbits of the planets, is occupied by a very large number of comparatively small bodies.” Edgeworth said these worlds were leftovers from the birth of the solar system. In 1951, American astronomer Gerard Kuiper suggested the same idea. For many ...
Exploring Exploring - MESSENGER Education
... other resources, such as better shelter or a source of ...
... other resources, such as better shelter or a source of ...
Advances in exoplanet science from Kepler (Lissauer et al. 2014)
... deduce the star’s radius and mass, and from these we can find the planet’s radius and the semi-major axis of its orbit (from Kepler’s third law). In favourable cases (generally restricted to close-in planets that are subject to intense stellar irradiation), we can detect the occultation of the plane ...
... deduce the star’s radius and mass, and from these we can find the planet’s radius and the semi-major axis of its orbit (from Kepler’s third law). In favourable cases (generally restricted to close-in planets that are subject to intense stellar irradiation), we can detect the occultation of the plane ...
- ANU Repository
... is flat except for a decline for orbits less than a few days. 12 candidate planets, including two Jupiter-size objects, experience an irradiance below the threshold level for a runaway greenhouse on an Earth-like planet and are thus in a ‘habitable zone’. Key words: stars: abundances – stars: fundame ...
... is flat except for a decline for orbits less than a few days. 12 candidate planets, including two Jupiter-size objects, experience an irradiance below the threshold level for a runaway greenhouse on an Earth-like planet and are thus in a ‘habitable zone’. Key words: stars: abundances – stars: fundame ...
The Galactic evolution of phosphorus
... and 1058 nm) are blended with a Ni i and Si i line, respectively. According to the strength of the lines and the stellar V sin i, we fitted the P i line alone, or took into account the close-by line at the same time, using the deblending option of splot. We used the code WIDTH (Kurucz 1993, 2005; Ca ...
... and 1058 nm) are blended with a Ni i and Si i line, respectively. According to the strength of the lines and the stellar V sin i, we fitted the P i line alone, or took into account the close-by line at the same time, using the deblending option of splot. We used the code WIDTH (Kurucz 1993, 2005; Ca ...
Eris en Dysnomia
... (M. Brown (Caltech), C. Trujillo (Gemini), D. Rabinowitz (Yale), NSF, NASA, apod050731) ...
... (M. Brown (Caltech), C. Trujillo (Gemini), D. Rabinowitz (Yale), NSF, NASA, apod050731) ...
OUR SOLAR SYSTEM
... quiet backwater of a barred spiral galaxy known as the Milky Way, itself one of billions of galaxies. Yet at the same time, we can take heart in knowing that our little tract of the universe remains exceptional as the only place where we know life exists. Our solar system hosts one abode for life, E ...
... quiet backwater of a barred spiral galaxy known as the Milky Way, itself one of billions of galaxies. Yet at the same time, we can take heart in knowing that our little tract of the universe remains exceptional as the only place where we know life exists. Our solar system hosts one abode for life, E ...
júpiter, king of the moon
... Jupiter and the proximity to Europe and Ganymede. It is rocky and permanently maintains intense volcanic eruptions, is the most volcanically active body in the Solar System. The massive volcanic eruptions over the past million years are the cause of the satellite is found permanently covered by a 10 ...
... Jupiter and the proximity to Europe and Ganymede. It is rocky and permanently maintains intense volcanic eruptions, is the most volcanically active body in the Solar System. The massive volcanic eruptions over the past million years are the cause of the satellite is found permanently covered by a 10 ...
Water ice lines and the formation of giant moons around super
... simulations by Gressel et al. (2013, see their Sect. 6.3) produce circumplanetary surface gas densities that agree much better with the “gas-starved” model of Canup & Ward (2006), which our model is derived from, than with the “minimum mass” model of Mosqueira & Estrada (2003a).5 The latter authors ...
... simulations by Gressel et al. (2013, see their Sect. 6.3) produce circumplanetary surface gas densities that agree much better with the “gas-starved” model of Canup & Ward (2006), which our model is derived from, than with the “minimum mass” model of Mosqueira & Estrada (2003a).5 The latter authors ...
Chapter 12 Lecture 2
... • What are the life stages of a low-mass star? • A low-mass star spends most of its life generating energy by fusing hydrogen in its core. Then it becomes a red giant, with a hydrogen shell burning around an inert helium core. Next comes helium core burning, followed by doubleshell burning of hydrog ...
... • What are the life stages of a low-mass star? • A low-mass star spends most of its life generating energy by fusing hydrogen in its core. Then it becomes a red giant, with a hydrogen shell burning around an inert helium core. Next comes helium core burning, followed by doubleshell burning of hydrog ...
A magnetic communication scenario for hot Jupiters
... The input parameters of our model are the stellar and planetary parameters listed above, of which only T and B are varied in order to fit the observations. The only output is the stellar wind solution, i.e. density, magnetic field and velocity as a function of the distance from the stellar surfac ...
... The input parameters of our model are the stellar and planetary parameters listed above, of which only T and B are varied in order to fit the observations. The only output is the stellar wind solution, i.e. density, magnetic field and velocity as a function of the distance from the stellar surfac ...
ISA_lecture01 - School of Physics
... ≥103 km in regular orbit around a star 9 in our solar system IAU GA 2006: Observations are changing our understanding of planetary systems, and it is important that our nomenclature for objects reflect our current understanding. This applies, in particular, to the designation “planets”…Recent di ...
... ≥103 km in regular orbit around a star 9 in our solar system IAU GA 2006: Observations are changing our understanding of planetary systems, and it is important that our nomenclature for objects reflect our current understanding. This applies, in particular, to the designation “planets”…Recent di ...
... change? Well, this increase is primarily due to the humanmade greenhouse gases. Levels of CO2 have increased from around 280 parts per million (ppm) to around 380 ppm now. Studies of ice core show that concentrations of CO2 have not been so high for nearly half a million years. At the current rate o ...
Stars A globular cluster is a tightly grouped swarm of stars held
... Earth's atmosphere. Starlight enters the atmosphere as straight rays. Twinkling occurs because air movements constantly change the path of the light as it comes through the air. You can see a similar effect if you stand in a swimming pool and look down. Unless the water is almost perfectly still, yo ...
... Earth's atmosphere. Starlight enters the atmosphere as straight rays. Twinkling occurs because air movements constantly change the path of the light as it comes through the air. You can see a similar effect if you stand in a swimming pool and look down. Unless the water is almost perfectly still, yo ...
Canis Majoris
... Canis Majoris is the largest star that has so far been discovered. When viewed from earth it’s very tiny, which means it has a very small apparent magnitude. Canis Majoris is so large that you could fit about seven quadrillion earths inside of it. To put this into perspective, if earth were the size ...
... Canis Majoris is the largest star that has so far been discovered. When viewed from earth it’s very tiny, which means it has a very small apparent magnitude. Canis Majoris is so large that you could fit about seven quadrillion earths inside of it. To put this into perspective, if earth were the size ...
exemplars and commentary
... .Barnard’s star was thought to have no flares, due to its age, but one was observed in 2011. The significance of Red Dwarfs to astronomy. Although intelligent life formed around a “G” star for us astronomers think that life will most likely be found around a Red Dwarf. Primarily because their energy ...
... .Barnard’s star was thought to have no flares, due to its age, but one was observed in 2011. The significance of Red Dwarfs to astronomy. Although intelligent life formed around a “G” star for us astronomers think that life will most likely be found around a Red Dwarf. Primarily because their energy ...
ISNS3371_041007_bw
... evidenced from our science fiction. • We finally obtained direct evidence of the existence of an extrasolar planet in the year 1995. – A planet was discovered in orbit around the star 51 Pegasi. – Over 100 such extrasolar planets are now known to exist. ...
... evidenced from our science fiction. • We finally obtained direct evidence of the existence of an extrasolar planet in the year 1995. – A planet was discovered in orbit around the star 51 Pegasi. – Over 100 such extrasolar planets are now known to exist. ...
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.