ACCELERATION DUE TO GRAVITY IN STAR WARS In Star Wars
... In Star Wars, every planet has the same acceleration due to gravity as the Earth. Why? How does the mass of a planet depend on its radius in that case? How to realise this relation in practice? 1 The force of gravity between two spherical bodies is Gm1 m2 ...
... In Star Wars, every planet has the same acceleration due to gravity as the Earth. Why? How does the mass of a planet depend on its radius in that case? How to realise this relation in practice? 1 The force of gravity between two spherical bodies is Gm1 m2 ...
Carter K 1 - Mrs. Anthony`s English 2
... From what I have read, I think the key to life are all the exoplanets, a planet that orbits a star / sun other than ours. Lonnie Shekhtman said that scientists “found loads of exoplanets” (Shekhtman). According to NASA one fifth of the exoplanets are found in the habitable zone of their sun. Those a ...
... From what I have read, I think the key to life are all the exoplanets, a planet that orbits a star / sun other than ours. Lonnie Shekhtman said that scientists “found loads of exoplanets” (Shekhtman). According to NASA one fifth of the exoplanets are found in the habitable zone of their sun. Those a ...
Planets With Detectable Life - International Space Science Institute
... Earth-size planet in the orbit of Mars could be habitable. Even the present Mars may have harbored the origin of life early in its history during an episode when the atmosphere was thicker and liquid water ran across the surface and pooled in its impact craters (Owen, 1997). Just how warm and wet Ma ...
... Earth-size planet in the orbit of Mars could be habitable. Even the present Mars may have harbored the origin of life early in its history during an episode when the atmosphere was thicker and liquid water ran across the surface and pooled in its impact craters (Owen, 1997). Just how warm and wet Ma ...
Astronomical Ideas Fall 2012 HW 2 solutions 1. a. Compare the
... We need to use the full version of Keplerʼs 3rd law, rather than only the proportionality because we donʼt have data on other bodies orbiting Ida with which to construct a proportionality. Therefore: ...
... We need to use the full version of Keplerʼs 3rd law, rather than only the proportionality because we donʼt have data on other bodies orbiting Ida with which to construct a proportionality. Therefore: ...
$doc.title
... 3a. Kepler-‐12 is a Sun-‐like star with of mass M = 1.2 M!. It has a planet, Kepler-‐12b, that transits every 4.4 days, causing the starlight to dim by a factor of 1.7% over a period of ...
... 3a. Kepler-‐12 is a Sun-‐like star with of mass M = 1.2 M!. It has a planet, Kepler-‐12b, that transits every 4.4 days, causing the starlight to dim by a factor of 1.7% over a period of ...
Lecture 1
... • 15 multiple planetary systems Pulsar planets • 6 planets Free-floating planets • 1 planet New planets are being found at a rate of around 1 per month ...
... • 15 multiple planetary systems Pulsar planets • 6 planets Free-floating planets • 1 planet New planets are being found at a rate of around 1 per month ...
Summary of the Presentation
... (assuming a constant production rate) eliminating 2/3 as being too young, the value of R was estimated to be ~85,000 suitable stars per billion cubic light years. Of the stars examined for planets, planets have been found around only ~12%. As the ability to detect small planets improves, a larger pe ...
... (assuming a constant production rate) eliminating 2/3 as being too young, the value of R was estimated to be ~85,000 suitable stars per billion cubic light years. Of the stars examined for planets, planets have been found around only ~12%. As the ability to detect small planets improves, a larger pe ...
Newly discovered planet could be a watery world
... crushing pressure of the atmosphere, you might splash into a hot ocean. At least, that's what Charbonneau and his colleagues think this planet is like. There's no way to know for sure, with current technology. But the scientists have been able to determine that the planet is about 2.5 times the size ...
... crushing pressure of the atmosphere, you might splash into a hot ocean. At least, that's what Charbonneau and his colleagues think this planet is like. There's no way to know for sure, with current technology. But the scientists have been able to determine that the planet is about 2.5 times the size ...
Planetary Configurations
... out and spiralled in via interactions with protoplanetary disk. • Some have large eccentricities, which is similar to binary stars and may indicated Brown Dwarf companions (recall that Doppler gives only lower limits to companion mass). • Planets are “Jupiter-ish” and not likely habitable; however, ...
... out and spiralled in via interactions with protoplanetary disk. • Some have large eccentricities, which is similar to binary stars and may indicated Brown Dwarf companions (recall that Doppler gives only lower limits to companion mass). • Planets are “Jupiter-ish” and not likely habitable; however, ...
lec03_30sep2011
... “terrestrial planet” region. Extrapolation of current incompeteness suggests >12% w/planets @ <20 AU. - multiple planetary systems are ~common - planetary resonances are ~common What can explain these properties? ...
... “terrestrial planet” region. Extrapolation of current incompeteness suggests >12% w/planets @ <20 AU. - multiple planetary systems are ~common - planetary resonances are ~common What can explain these properties? ...
ESSAY - First Earth-Like Exoplanet Found in Habitable Zone
... Carnegie's Alan Boss, has discovered what could be a large, rocky planet with a surface temperature of about 22 degrees Celsius (72 degrees Fahrenheit), comparable to a comfortable spring day on Earth. This landmark finding will be published in The Astrophysical Journal. The discovery team, led by W ...
... Carnegie's Alan Boss, has discovered what could be a large, rocky planet with a surface temperature of about 22 degrees Celsius (72 degrees Fahrenheit), comparable to a comfortable spring day on Earth. This landmark finding will be published in The Astrophysical Journal. The discovery team, led by W ...
Homes for life
... The HZ will move outwards as a star warms during its MS life, so a zone that is continuously habitable will be far smaller than the current HZ. This is related to the Faint Young Sun problem we will return to later: the Earth's surface temperature has been relatively constant over a period in which ...
... The HZ will move outwards as a star warms during its MS life, so a zone that is continuously habitable will be far smaller than the current HZ. This is related to the Faint Young Sun problem we will return to later: the Earth's surface temperature has been relatively constant over a period in which ...
Kepler 186f - Forum Skylive
... could scorch planets nearby. The M dwarf stars also gravitationally interact with their planets, causing tides that heat the planet and often cause their rotations to be ‘tidally locked’, which means one side always faces the star and the other side faces the cold open space, much like our moon is t ...
... could scorch planets nearby. The M dwarf stars also gravitationally interact with their planets, causing tides that heat the planet and often cause their rotations to be ‘tidally locked’, which means one side always faces the star and the other side faces the cold open space, much like our moon is t ...
Planetary Configurations
... • The planet’s size was determined using the transit method: The amount of light measured from a star decreases when a planet passes in front. The amount of decrease indicates the planet’s size. ...
... • The planet’s size was determined using the transit method: The amount of light measured from a star decreases when a planet passes in front. The amount of decrease indicates the planet’s size. ...
That star is an M-dwarf, smaller, dimmer and cooler than our sun. So
... give off more damaging radiation than G-type stars like our sun. Kepler-186f, however, appears to sit far away enough from its star to be out of harm’s way. “That’s Very Exciting” (13) The discovery of Kepler-186f indicates that there may be more than one kind of habitable planet. From now on, scien ...
... give off more damaging radiation than G-type stars like our sun. Kepler-186f, however, appears to sit far away enough from its star to be out of harm’s way. “That’s Very Exciting” (13) The discovery of Kepler-186f indicates that there may be more than one kind of habitable planet. From now on, scien ...
Discs and Planets
... the inner and faster material accelerates it. This frictional interaction causes circularization and orbital migration. The direction is controlled by which material has the stronger interaction . In particular if there is an inner cavity the outer and slower material wins leading to inward migratio ...
... the inner and faster material accelerates it. This frictional interaction causes circularization and orbital migration. The direction is controlled by which material has the stronger interaction . In particular if there is an inner cavity the outer and slower material wins leading to inward migratio ...
Planets Beyond the Solar System
... Microlensing events are not very common It is also difficult to get a repeat observation This method does not work well for planets that are very close to their stars. ...
... Microlensing events are not very common It is also difficult to get a repeat observation This method does not work well for planets that are very close to their stars. ...
Planets Beyond the Solar System
... Microlensing events are not very common It is also difficult to get a repeat observation This method does not work well for planets that are very close to their stars. ...
... Microlensing events are not very common It is also difficult to get a repeat observation This method does not work well for planets that are very close to their stars. ...
Word doc - UC-HiPACC - University of California, Santa Cruz
... collaborators were testing a new noise-analysis method on spectrometer data to calibrate their technique. Indeed, the team of 15 astronomers from seven institutions on four continents had picked Tau Ceti specifically because meticulous observations strongly suggested the star had no planetary system ...
... collaborators were testing a new noise-analysis method on spectrometer data to calibrate their technique. Indeed, the team of 15 astronomers from seven institutions on four continents had picked Tau Ceti specifically because meticulous observations strongly suggested the star had no planetary system ...
Methods Of Discovering Extra solar Planets.
... • This method is rarely used, by that the planet and the star must be aligned in the direction astronomers are looking at. • That is the only time astronomers used this method, but it is vital and can be used if ...
... • This method is rarely used, by that the planet and the star must be aligned in the direction astronomers are looking at. • That is the only time astronomers used this method, but it is vital and can be used if ...
PH507-assn-exo-answers
... 1. Suppose that two exoplanets are observed to transit the same star. They are both in circular orbits with an inclination of 90 degrees. One produces periodic dips with a period of 4 days and the other produces periodic dips with a period of 108 days. The decrease in luminosity caused by both exopl ...
... 1. Suppose that two exoplanets are observed to transit the same star. They are both in circular orbits with an inclination of 90 degrees. One produces periodic dips with a period of 4 days and the other produces periodic dips with a period of 108 days. The decrease in luminosity caused by both exopl ...
I. What is an Exoplanet?
... reflected light variations. This is because, like our Moon, they also go through phases from full to new and back again. Since telescopes cannot resolve the planet from the star, they see only the combined light. The brightness of the host star will seem to change over each orbit in a periodic ...
... reflected light variations. This is because, like our Moon, they also go through phases from full to new and back again. Since telescopes cannot resolve the planet from the star, they see only the combined light. The brightness of the host star will seem to change over each orbit in a periodic ...
Lecture 21
... (e) Now what will be the period of the star's Doppler shift pattern for its spectral lines? (f) What is the orbital speed of the star in its orbit around the center of mass? (g) What will be the wavelength shift for a visible line (say with wavelength 500 nm)? ...
... (e) Now what will be the period of the star's Doppler shift pattern for its spectral lines? (f) What is the orbital speed of the star in its orbit around the center of mass? (g) What will be the wavelength shift for a visible line (say with wavelength 500 nm)? ...
Gliese 581
Gliese 581 (/ˈɡliːzə/) is a star of spectral type M3V (a red dwarf) about 20 light years away from Earth in the constellation Libra. Its estimated mass is about a third of that of the Sun, and it is the 89th closest known star to the Sun. Observations suggest that the star has a planetary system consisting of three known planets, designated Gliese 581 b, c, and e and a possibly confirmed planet, d, in order of discovery. Additional outer planets, which received the designations Gliese 581 f, and g have been proposed, but the evidence that led to the discovery claims has been shown to be the result of stellar activity mimicking the radial velocity variations due to orbiting planets.Gliese 581 has been the subject of a ""huge amount of attention"" in the quest to discover the first habitable extrasolar planet; first for c, and then d and g. Gliese 581 c, the first low-mass extrasolar planet found near a habitable zone, was discovered in April 2007. It has since been shown that under known terrestrial planet climate models, Gliese 581 c is likely to have a runaway greenhouse effect, and hence is probably too hot to be habitable, analogous to Venus. The proposed planets Gliese 581 d and Gliese 581 g also received attention as being located within the habitable zone, but their existence has subsequently been put into doubt by some authors.On 27 November 2012, the European Space Agency announced a debris disk, with at least ten times as many comets as the Solar System. This put constraints on possible planets beyond 0.75 AU.