Transiting exoplanets from the CoRoT space mission
... comparing observations during predicted transit-times with observations out of transit. Time-series follow-up is described in more detail in Deeg et al. (2009). Figure 3 shows that the field is rather crowded around the target star (labeled with a T). For any nearby star around the Corot-23 target, ...
... comparing observations during predicted transit-times with observations out of transit. Time-series follow-up is described in more detail in Deeg et al. (2009). Figure 3 shows that the field is rather crowded around the target star (labeled with a T). For any nearby star around the Corot-23 target, ...
Chap4-Timing
... 4.2.1 Pulsating stars – white dwarfs Fate of planetary systems during the red giant phase. All planets within the final extent of the red giant envelope will be engulfed and migrate inwards. Planets further out will have greater chance of survival, migrating outwards as mass is lost from cent ...
... 4.2.1 Pulsating stars – white dwarfs Fate of planetary systems during the red giant phase. All planets within the final extent of the red giant envelope will be engulfed and migrate inwards. Planets further out will have greater chance of survival, migrating outwards as mass is lost from cent ...
On the correlation between stellar chromospheric flux and the
... show signatures of condensations absorbing in Hα, that are located a few stellar radii above the surface (Collier Cameron & Robinson 1989a,b). Prominence-like structures were also observed in CoRoT-2 (Czesla et al. 2012). In late-type stars that are accompanied by close-in planets, different magneti ...
... show signatures of condensations absorbing in Hα, that are located a few stellar radii above the surface (Collier Cameron & Robinson 1989a,b). Prominence-like structures were also observed in CoRoT-2 (Czesla et al. 2012). In late-type stars that are accompanied by close-in planets, different magneti ...
View/Open - SUNY DSpace
... planet did move it would be moving too fast and he said the planet is too heavy to move, therefore Earth did not move, it was stationary and all the other planets revolved around the Earth. Then around the time, 100AD Ptolemy studied the sky more in depth. He noticed that sometimes planets moved fas ...
... planet did move it would be moving too fast and he said the planet is too heavy to move, therefore Earth did not move, it was stationary and all the other planets revolved around the Earth. Then around the time, 100AD Ptolemy studied the sky more in depth. He noticed that sometimes planets moved fas ...
A rocky planet transiting a nearby low-mass star
... The distance to GJ 1132 has been measured through trigonometric parallax to be 12.04"±"0.24 parsecs17, a value that we independently validate with MEarth astrometry (see Methods). Together with empirical relations among the intrinsic luminosities, masses and radii of Mdwarf stars18, 19, the parallax ...
... The distance to GJ 1132 has been measured through trigonometric parallax to be 12.04"±"0.24 parsecs17, a value that we independently validate with MEarth astrometry (see Methods). Together with empirical relations among the intrinsic luminosities, masses and radii of Mdwarf stars18, 19, the parallax ...
... a “planet”. First, it was argued that a celestial body can be defined as a planet if it is in orbit around a star while not being itself a star or a satellite. Second, the object must be large enough for its own gravity to pull it into a nearly spherical shape. The shape of objects with mass above 5 ...
A Theory of the Origin of the Solar System There have been
... have been formed through the same stages of evolution. The idea may also be extended to one generation back, that is, the Sun along with its few brother stars might have been formed by the same course of evolution and at some stage might be revolving in coplaner and nearly circular orbits around the ...
... have been formed through the same stages of evolution. The idea may also be extended to one generation back, that is, the Sun along with its few brother stars might have been formed by the same course of evolution and at some stage might be revolving in coplaner and nearly circular orbits around the ...
RV Metric_new_8
... are the planets with outcome #2, each of which has a unique probability P. We estimate the probability Pk of the kth random variable by a Monte Carlo experiment, as follows. First, we create a large sample of random values of i by drawing from the appropriate random deviate, which is arccos(1- 2Q) , ...
... are the planets with outcome #2, each of which has a unique probability P. We estimate the probability Pk of the kth random variable by a Monte Carlo experiment, as follows. First, we create a large sample of random values of i by drawing from the appropriate random deviate, which is arccos(1- 2Q) , ...
Figueira, Pont, Mordasini, Alibert, Georgy, Benz
... Depending on the exact temperature history of the formation of the initial planetary core, a certain amount of ammonia and methane can be mixed with the water. To estimate the importance of a potential enrichment in these non-water ices, we also consider a suite of models with the mixed water+ammoni ...
... Depending on the exact temperature history of the formation of the initial planetary core, a certain amount of ammonia and methane can be mixed with the water. To estimate the importance of a potential enrichment in these non-water ices, we also consider a suite of models with the mixed water+ammoni ...
Potential for Life on the Terrestrial Planets
... and Earth. From this method the mass of the exoplanet and its semi-major axis can be determined. So far 14 exoplanets have been discovered with the gravitational microlensing method. The disadvantage of this method is that, in general, follow -up observations are not possible. It should be noted tha ...
... and Earth. From this method the mass of the exoplanet and its semi-major axis can be determined. So far 14 exoplanets have been discovered with the gravitational microlensing method. The disadvantage of this method is that, in general, follow -up observations are not possible. It should be noted tha ...
Here - ScienceA2Z.com
... A planet is any object in orbit around the Sun that has enough mass to form itself into a spherical shape and has cleared its immediate neighborhood of all smaller objects. By this definition, the Solar System has eight known planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptun ...
... A planet is any object in orbit around the Sun that has enough mass to form itself into a spherical shape and has cleared its immediate neighborhood of all smaller objects. By this definition, the Solar System has eight known planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptun ...
The Formation of Planetary Systems
... gas clouds, fallen meteorites, and Earth’s Moon, as well as of the various planets observed with ground-based telescopes and planetary space probes. Ironically, studies of Earth itself do not help much, because information about our planet’s early stages eroded away long ago. Meteorites and comets p ...
... gas clouds, fallen meteorites, and Earth’s Moon, as well as of the various planets observed with ground-based telescopes and planetary space probes. Ironically, studies of Earth itself do not help much, because information about our planet’s early stages eroded away long ago. Meteorites and comets p ...
DATA FROM CATALOGUES OF SOLAR SYSTEM OBJECTS IN
... the current position of the minor planet in the solar system. This page has been an inspiration for me during creating of applications on Astronomia web pages. Application from NASA is based on the Java applet; this one can cause performance problems, it should be a safety risk etc. Nevertheless the ...
... the current position of the minor planet in the solar system. This page has been an inspiration for me during creating of applications on Astronomia web pages. Application from NASA is based on the Java applet; this one can cause performance problems, it should be a safety risk etc. Nevertheless the ...
Lecture7_2014_v2
... Gravitational instability model: pros and cons • Pros: – Under some circumstances it may be natural to form gravitationally unstable disks – Happens very fast ...
... Gravitational instability model: pros and cons • Pros: – Under some circumstances it may be natural to form gravitationally unstable disks – Happens very fast ...
Chapter 6 - Soran University
... • Solar systems are in galaxies which are in the Universe • Comets (rock and ice) have long elliptical orbits around Sun • Life cycle of stars – differs for massive & small stars • History of the Universe – Big Bang ...
... • Solar systems are in galaxies which are in the Universe • Comets (rock and ice) have long elliptical orbits around Sun • Life cycle of stars – differs for massive & small stars • History of the Universe – Big Bang ...
Darwin – A Mission to Detect, and Search for Life on, Extrasolar
... between star and planet occurs. The baseline mission lasts 5 years and consists of approximately 200 individual target stars. Among these, 25 to 50 planetary systems can be studied spectroscopically, searching for gases such as CO2, H2O, CH4 and O3. Many of the key technologies required for the cons ...
... between star and planet occurs. The baseline mission lasts 5 years and consists of approximately 200 individual target stars. Among these, 25 to 50 planetary systems can be studied spectroscopically, searching for gases such as CO2, H2O, CH4 and O3. Many of the key technologies required for the cons ...
Fomalhaut b
... “A planetary system as the origin of structure in Fomalhaut’s dust belt” 2005, Nature, Vol. 435, pp. 1067 • No planet found, but dust belt seen for the first time in reflected light • Remarkable properties: Not centered on the star and very sharp inner edge • Explanation: Gravitational Perturbati ...
... “A planetary system as the origin of structure in Fomalhaut’s dust belt” 2005, Nature, Vol. 435, pp. 1067 • No planet found, but dust belt seen for the first time in reflected light • Remarkable properties: Not centered on the star and very sharp inner edge • Explanation: Gravitational Perturbati ...
CHAPTER 8 Survey of Solar Systems
... to Pluto, the International Astronomical Union introduced in 2006 a new category of Solar System objects called dwarf planets. A dwarf planet is an object that orbits the Sun, is massive enough that its gravity compresses it into an approximately spherical shape, but has not swept its orbital region ...
... to Pluto, the International Astronomical Union introduced in 2006 a new category of Solar System objects called dwarf planets. A dwarf planet is an object that orbits the Sun, is massive enough that its gravity compresses it into an approximately spherical shape, but has not swept its orbital region ...
Effects of Mutual Transits by Extrasolar Planet
... We call a gravitationally bound system of two extrasolar planet-size objects simply as extrasolar binary planets. They constitute a true binary if the following conditions are satisfied instead of (c) in addition to the criteria (a) with replacing the Sun by a host star and (b). (c1) Their total mas ...
... We call a gravitationally bound system of two extrasolar planet-size objects simply as extrasolar binary planets. They constitute a true binary if the following conditions are satisfied instead of (c) in addition to the criteria (a) with replacing the Sun by a host star and (b). (c1) Their total mas ...
Kepler`s Search for Exoplanets
... Here we’ve marked stars with confirmed exoplanets. There are over nearly 2000 confirmed exoplanets [update as needed], and we’re still just getting started! Results from Kepler indicate that it’s likely every star we see in the night sky has planets. And it’s just a matter of time before we find ano ...
... Here we’ve marked stars with confirmed exoplanets. There are over nearly 2000 confirmed exoplanets [update as needed], and we’re still just getting started! Results from Kepler indicate that it’s likely every star we see in the night sky has planets. And it’s just a matter of time before we find ano ...
Setting the Stage for Habitable Planets
... It is important to clearly define what we mean by the term “habitable planet”. Some will object that the word “planet” is too restrictive. In principle, a habitable environment might be located on a non-planetary body. Perhaps the term “habitable body” would be preferred, which could include such po ...
... It is important to clearly define what we mean by the term “habitable planet”. Some will object that the word “planet” is too restrictive. In principle, a habitable environment might be located on a non-planetary body. Perhaps the term “habitable body” would be preferred, which could include such po ...
A Planetary Overview
... now a dwarf planet, along with the asteroid Ceres and Eris, an object a bit larger than Pluto in the Kuiper belt. The IAU will establish a process to assign borderline objects into either dwarf planet or other categories. The third category above includes most of the asteroids, most of the objects b ...
... now a dwarf planet, along with the asteroid Ceres and Eris, an object a bit larger than Pluto in the Kuiper belt. The IAU will establish a process to assign borderline objects into either dwarf planet or other categories. The third category above includes most of the asteroids, most of the objects b ...
Age aspects of habitability - Cambridge University Press
... Abstract: A ‘habitable zone’ of a star is defined as a range of orbits within which a rocky planet can support liquid water on its surface. The most intriguing question driving the search for habitable planets is whether they host life. But is the age of the planet important for its habitability? If ...
... Abstract: A ‘habitable zone’ of a star is defined as a range of orbits within which a rocky planet can support liquid water on its surface. The most intriguing question driving the search for habitable planets is whether they host life. But is the age of the planet important for its habitability? If ...
ART. VULCAN/05
... so uncertain and irregular. Therefore, it became impossible to consider Vulcan as a planetary body, for being too close to Mercury. Then, eventhough some unsuccessful research onboard Skylab in the 70’s, the interest to observe Vulcan remained mostly absent. Why? Its size is small, its position clos ...
... so uncertain and irregular. Therefore, it became impossible to consider Vulcan as a planetary body, for being too close to Mercury. Then, eventhough some unsuccessful research onboard Skylab in the 70’s, the interest to observe Vulcan remained mostly absent. Why? Its size is small, its position clos ...
KEPLER: Search for Earth-Size Planets in the Habitable Zone
... a minimum of three transits. Because the number of planets expected to be detected depends on the number and characteristics of those assumed for the model calculation, the values shown in Figures 4 and 5 are for illustrative purposes only! The sole purpose of the Kepler Mission is to determine thes ...
... a minimum of three transits. Because the number of planets expected to be detected depends on the number and characteristics of those assumed for the model calculation, the values shown in Figures 4 and 5 are for illustrative purposes only! The sole purpose of the Kepler Mission is to determine thes ...
Planet
A planet (from Ancient Greek ἀστήρ πλανήτης (astēr planētēs), or πλάνης ἀστήρ (plánēs astēr), meaning ""wandering star"") is an astronomical object orbiting a star, brown dwarf, or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to cause thermonuclear fusion, and has cleared its neighbouring region of planetesimals.The term planet is ancient, with ties to history, science, mythology, and religion. Several planets in the Solar System can be seen with the naked eye. These were regarded by many early cultures as divine, or as emissaries of deities. As scientific knowledge advanced, human perception of the planets changed, incorporating a number of disparate objects. In 2006, the International Astronomical Union (IAU) officially adopted a resolution defining planets within the Solar System. This definition is controversial because it excludes many objects of planetary mass based on where or what they orbit. Although eight of the planetary bodies discovered before 1950 remain ""planets"" under the modern definition, some celestial bodies, such as Ceres, Pallas, Juno, Vesta (each an object in the solar asteroid belt), and Pluto (the first trans-Neptunian object discovered), that were once considered planets by the scientific community are no longer viewed as such.The planets were thought by Ptolemy to orbit Earth in deferent and epicycle motions. Although the idea that the planets orbited the Sun had been suggested many times, it was not until the 17th century that this view was supported by evidence from the first telescopic astronomical observations, performed by Galileo Galilei. By careful analysis of the observation data, Johannes Kepler found the planets' orbits were not circular but elliptical. As observational tools improved, astronomers saw that, like Earth, the planets rotated around tilted axes, and some shared such features as ice caps and seasons. Since the dawn of the Space Age, close observation by space probes has found that Earth and the other planets share characteristics such as volcanism, hurricanes, tectonics, and even hydrology.Planets are generally divided into two main types: large low-density giant planets, and smaller rocky terrestrials. Under IAU definitions, there are eight planets in the Solar System. In order of increasing distance from the Sun, they are the four terrestrials, Mercury, Venus, Earth, and Mars, then the four giant planets, Jupiter, Saturn, Uranus, and Neptune. Six of the planets are orbited by one or more natural satellites.More than a thousand planets around other stars (""extrasolar planets"" or ""exoplanets"") have been discovered in the Milky Way: as of 1 October 2015, 1968 known extrasolar planets in 1248 planetary systems (including 490 multiple planetary systems), ranging in size from just above the size of the Moon to gas giants about twice as large as Jupiter. On December 20, 2011, the Kepler Space Telescope team reported the discovery of the first Earth-sized extrasolar planets, Kepler-20e and Kepler-20f, orbiting a Sun-like star, Kepler-20. A 2012 study, analyzing gravitational microlensing data, estimates an average of at least 1.6 bound planets for every star in the Milky Way.Around one in five Sun-like stars is thought to have an Earth-sized planet in its habitable zone.