Astrology
... • Sun sign compatibility? No correlation with 3000 couples marrying or 500 divorcing. • Choice of profession: No correlation with Sun sign for 6000 politicians or 17,000 scientists • Horoscope of mass murderer sent to 150 people. 94% said it described them well. • 3000 specific predictions about cel ...
... • Sun sign compatibility? No correlation with 3000 couples marrying or 500 divorcing. • Choice of profession: No correlation with Sun sign for 6000 politicians or 17,000 scientists • Horoscope of mass murderer sent to 150 people. 94% said it described them well. • 3000 specific predictions about cel ...
On the probability of habitable planets.
... forward in our investigation of the ultimate question in astrobiology: “are we alone ?”. In particular, we will soon be able to estimate one of the first terms of the Drake equation, the fraction of stars with planets, and even evaluate the abundance of planets of a given size (including rocky or oc ...
... forward in our investigation of the ultimate question in astrobiology: “are we alone ?”. In particular, we will soon be able to estimate one of the first terms of the Drake equation, the fraction of stars with planets, and even evaluate the abundance of planets of a given size (including rocky or oc ...
Formation and Detectability of Terrestrial Planets around
... to detect rocky planets in the α Centauri system is the unknown magnitude of ultra-low frequency stellar noise. Subject headings: binaries: general — planetary systems: formation — planetary systems: protoplanetary disks — stars: individual (Alpha Centauri B) ...
... to detect rocky planets in the α Centauri system is the unknown magnitude of ultra-low frequency stellar noise. Subject headings: binaries: general — planetary systems: formation — planetary systems: protoplanetary disks — stars: individual (Alpha Centauri B) ...
2.4 Statistical properties of radial velocity planets
... Statistical results presented in this and the following section are mainly from the review paper of Udry and Santos (2007, Ann Rev. Astron. & Astrophys. 45, 397) and the preprint from Mayor et al. (2011, arXiv:1109.2497v1). Because of the rapid progress in this field many of the presented results wi ...
... Statistical results presented in this and the following section are mainly from the review paper of Udry and Santos (2007, Ann Rev. Astron. & Astrophys. 45, 397) and the preprint from Mayor et al. (2011, arXiv:1109.2497v1). Because of the rapid progress in this field many of the presented results wi ...
Planet Formation
... Planets form from the accretion disk present around a young star. Rocky planets like the terrestrial planets of the solar system form mainly from the dust inside this disk while gas giants are mainly build out of gas, with a solid core. The formation occurs in various steps. The first step is for th ...
... Planets form from the accretion disk present around a young star. Rocky planets like the terrestrial planets of the solar system form mainly from the dust inside this disk while gas giants are mainly build out of gas, with a solid core. The formation occurs in various steps. The first step is for th ...
Transiting exoplanets from the CoRoT space mission
... Since the beginning of 2007, the space mission CoRoT performs wide-field stellar photometry at ultra-high precision from space (Rouan et al. 1998; Baglin et al. 2006). Currently, during an observing run up to 6,000 stars1 can be monitored simultaneously and continuously over periods of 20 to 150 day ...
... Since the beginning of 2007, the space mission CoRoT performs wide-field stellar photometry at ultra-high precision from space (Rouan et al. 1998; Baglin et al. 2006). Currently, during an observing run up to 6,000 stars1 can be monitored simultaneously and continuously over periods of 20 to 150 day ...
an all-sky extrasolar planet survey with multiple object, dispersed
... ASEPS visible-wavelength survey has the sensitivity to detect giant planets at Jupiter-like distances (5 AU) from parent stars with V < 11. The nearinfrared survey will focus on infrared-bright M stars and may lead to discoveries of super-Earth-mass planets (∼10 Earth masses) in the habitable zones ...
... ASEPS visible-wavelength survey has the sensitivity to detect giant planets at Jupiter-like distances (5 AU) from parent stars with V < 11. The nearinfrared survey will focus on infrared-bright M stars and may lead to discoveries of super-Earth-mass planets (∼10 Earth masses) in the habitable zones ...
Primordial planets, comets and moons foster life in the cosmos
... Figure 1 illustrates schematically the differences between HGD cosmology and ΛCDMHC cosmology during the plasma epoch, soon after mass became the dominant cosmological component at time ~ 1011 seconds after the big bang event over energy. From HGD, 97% of the mass at that time is non-baryonic, with ...
... Figure 1 illustrates schematically the differences between HGD cosmology and ΛCDMHC cosmology during the plasma epoch, soon after mass became the dominant cosmological component at time ~ 1011 seconds after the big bang event over energy. From HGD, 97% of the mass at that time is non-baryonic, with ...
Research Paper Trojans in Habitable Zones
... the three-body problem with different mass ratios of the primary bodies. In this work, we studied the dynamical stability of the Trojan configuration where the GG is fully in the HZ. With the method of Marchal (1991), we have confirmed the stability of the 1:1 MMR for the 11 extrasolar systems that ...
... the three-body problem with different mass ratios of the primary bodies. In this work, we studied the dynamical stability of the Trojan configuration where the GG is fully in the HZ. With the method of Marchal (1991), we have confirmed the stability of the 1:1 MMR for the 11 extrasolar systems that ...
Renaissance Astronomy
... model for Mars matched Tycho’s data to an accuracy of 0.13º (8 arcminutes). Yet, this error exceeded the error in Tycho’s measurements, which bothered Kepler. Kepler’s persistence led him to abandon circles and try other shapes. The shape that worked for Mars and all other planets was the ellips ...
... model for Mars matched Tycho’s data to an accuracy of 0.13º (8 arcminutes). Yet, this error exceeded the error in Tycho’s measurements, which bothered Kepler. Kepler’s persistence led him to abandon circles and try other shapes. The shape that worked for Mars and all other planets was the ellips ...
A scenario of planet erosion by coronal radiation*
... distribution observed in Fig. 2, confirms that FX is the main variable, with few massive planets surviving exposure to high radiation as discussed below. The distribution of density with mass displayed in Fig. 3 is also consistent with the effects of erosion, since planets with higher densities would ...
... distribution observed in Fig. 2, confirms that FX is the main variable, with few massive planets surviving exposure to high radiation as discussed below. The distribution of density with mass displayed in Fig. 3 is also consistent with the effects of erosion, since planets with higher densities would ...
What is a planet? - X-ray and Observational Astronomy Group
... • describe the formation of the extra-solar planets: – (I) Planets form from dust which agglomerates into cores which then accrete gas from a disc. – (II) A gravitational instability in a protostellar disc creates a number of giant planets. ...
... • describe the formation of the extra-solar planets: – (I) Planets form from dust which agglomerates into cores which then accrete gas from a disc. – (II) A gravitational instability in a protostellar disc creates a number of giant planets. ...
Planet migration
... Now >500 planets discovered using this method, >5% of stars have planets (see http://exoplanet.eu or http://exoplanets.org) ...
... Now >500 planets discovered using this method, >5% of stars have planets (see http://exoplanet.eu or http://exoplanets.org) ...
The Anglo-Australian Planet Search – XXI. A Gas-Giant
... systematic corrections to the data are an obvious route for the creation of artificial signals like these (e.g. Bailes et al. 1991; Lyne & Bailes 1992). The only correction that (if it were in error) could conceivably generate a false signal in our data is the barycentric correction. We see no evide ...
... systematic corrections to the data are an obvious route for the creation of artificial signals like these (e.g. Bailes et al. 1991; Lyne & Bailes 1992). The only correction that (if it were in error) could conceivably generate a false signal in our data is the barycentric correction. We see no evide ...
the moons of jovian planets.
... a) a planet that once orbited the Sun but later was destroyed. b) ancient material from the formation of the solar system. c) a collision between Jupiter and one of its larger moons. d) comets that were trapped by Jupiter’s gravitational field. Explanation: Asteroids, meteoroids, and comets may have ...
... a) a planet that once orbited the Sun but later was destroyed. b) ancient material from the formation of the solar system. c) a collision between Jupiter and one of its larger moons. d) comets that were trapped by Jupiter’s gravitational field. Explanation: Asteroids, meteoroids, and comets may have ...
Our Solar System and Beyond
... What have we learned? • Where did asteroids and comets come from? — They are leftover planetesimals, according to the nebular theory. • How do we explain the existence of Earth’s moon and other exceptions to the rules? — The bombardment of newly formed planets by planetesimals may explain the excep ...
... What have we learned? • Where did asteroids and comets come from? — They are leftover planetesimals, according to the nebular theory. • How do we explain the existence of Earth’s moon and other exceptions to the rules? — The bombardment of newly formed planets by planetesimals may explain the excep ...
ExTRaSOLaR pLaNeTS
... pulsar) and in 1995 (around a “normal” star), extrasolar planet studies have become one of the most dynamic research fields in astronomy. Our knowledge of extrasolar planets has grown immensely, from our understanding of their formation and evolution to the development of different methods to detect ...
... pulsar) and in 1995 (around a “normal” star), extrasolar planet studies have become one of the most dynamic research fields in astronomy. Our knowledge of extrasolar planets has grown immensely, from our understanding of their formation and evolution to the development of different methods to detect ...
an Educator`s GuidE
... observing the effects they have on their parent stars. These effects, driven by gravity and line-of-sight, are visible to us as either periodic dimming (called “transits”) or shifting wavelengths within the electromagnetic spectrum (referred to as a “wobble”). To find a world capable of supporting l ...
... observing the effects they have on their parent stars. These effects, driven by gravity and line-of-sight, are visible to us as either periodic dimming (called “transits”) or shifting wavelengths within the electromagnetic spectrum (referred to as a “wobble”). To find a world capable of supporting l ...
an Educator`s GuidE - Museum of Science, Boston
... observing the effects they have on their parent stars. These effects, driven by gravity and line-of-sight, are visible to us as either periodic dimming (called “transits”) or shifting wavelengths within the electromagnetic spectrum (referred to as a “wobble”). To find a world capable of supporting l ...
... observing the effects they have on their parent stars. These effects, driven by gravity and line-of-sight, are visible to us as either periodic dimming (called “transits”) or shifting wavelengths within the electromagnetic spectrum (referred to as a “wobble”). To find a world capable of supporting l ...
an Educator`s GuidE
... observing the effects they have on their parent stars. These effects, driven by gravity and line-of-sight, are visible to us as either periodic dimming (called “transits”) or shifting wavelengths within the electromagnetic spectrum (referred to as a “wobble”). To find a world capable of supporting l ...
... observing the effects they have on their parent stars. These effects, driven by gravity and line-of-sight, are visible to us as either periodic dimming (called “transits”) or shifting wavelengths within the electromagnetic spectrum (referred to as a “wobble”). To find a world capable of supporting l ...
Finding habitable earths around white dwarfs with a robotic
... The search for planets similar to the Earth is one of the prime motivations for the study of extrasolar planets: we would like to find out how rare or common our Earth is, and we would like to know whether life exists in other solar systems. In designing this search, astronomers have primarily focus ...
... The search for planets similar to the Earth is one of the prime motivations for the study of extrasolar planets: we would like to find out how rare or common our Earth is, and we would like to know whether life exists in other solar systems. In designing this search, astronomers have primarily focus ...
observing cards - NC Science Festival
... greenish and not quite round. Green is the color humans see best, which is lucky because it is faint. Dist: 1,400 ly ...
... greenish and not quite round. Green is the color humans see best, which is lucky because it is faint. Dist: 1,400 ly ...
Lab Script
... Some planets appear, at times, to move backward in the sky as seen from Earth. "Mars is in retrograde" is a common statement in astrology and horoscopes and is used by these groups to denote a change in the way the planets are influencing our lives. However, our favorite science (astronomy!) tells u ...
... Some planets appear, at times, to move backward in the sky as seen from Earth. "Mars is in retrograde" is a common statement in astrology and horoscopes and is used by these groups to denote a change in the way the planets are influencing our lives. However, our favorite science (astronomy!) tells u ...
PLANETS
... SELECTION: Of course, while planets close to their parent stars will preferentially be found, due to their shorter orbital periods and greater likelihood to transit, planetary transits will be detected at all orbital separations. CONFIRMATION: In general, the detection of three successive transits w ...
... SELECTION: Of course, while planets close to their parent stars will preferentially be found, due to their shorter orbital periods and greater likelihood to transit, planetary transits will be detected at all orbital separations. CONFIRMATION: In general, the detection of three successive transits w ...
Gravitational redshifts
... Spectral lines, spatially and temporally averaged from 3-D models, change their strengths, widths, asymmetries and convective wavelength shifts across stellar disks, revealing details of atmospheric structure. These line profiles from disk center (µ = cos = 1) towards the limb are from a CO5BOLD mo ...
... Spectral lines, spatially and temporally averaged from 3-D models, change their strengths, widths, asymmetries and convective wavelength shifts across stellar disks, revealing details of atmospheric structure. These line profiles from disk center (µ = cos = 1) towards the limb are from a CO5BOLD mo ...
Kepler (spacecraft)
Kepler is a space observatory launched by NASA to discover Earth-like planets orbiting other stars. The spacecraft, named after the German Renaissance astronomer Johannes Kepler, was launched on March 7, 2009.Designed to survey a portion of our region of the Milky Way to discover dozens of Earth-size extrasolar planets in or near the habitable zone and estimate how many of the billions of stars in the Milky Way have such planets, Kepler's sole instrument is a photometer that continually monitors the brightness of over 145,000 main sequence stars in a fixed field of view. This data is transmitted to Earth, then analyzed to detect periodic dimming caused by extrasolar planets that cross in front of their host star.Kepler is part of NASA's Discovery Program of relatively low-cost, focused primary science missions. The telescope's construction and initial operation were managed by NASA's Jet Propulsion Laboratory, with Ball Aerospace responsible for developing the Kepler flight system. The Ames Research Center is responsible for the ground system development, mission operations since December 2009, and scientific data analysis. The initial planned lifetime was 3.5 years, but greater-than-expected noise in the data, from both the stars and the spacecraft, meant additional time was needed to fulfill all mission goals. Initially, in 2012, the mission was expected to last until 2016, but this would only have been possible if all remaining reaction wheels used for pointing the spacecraft remained reliable. On May 11, 2013, a second of four reaction wheels failed, disabling the collection of science data and threatening the continuation of the mission.On August 15, 2013, NASA announced that they had given up trying to fix the two failed reaction wheels. This meant the current mission needed to be modified, but it did not necessarily mean the end of planet-hunting. NASA had asked the space science community to propose alternative mission plans ""potentially including an exoplanet search, using the remaining two good reaction wheels and thrusters"". On November 18, 2013, the K2 ""Second Light"" proposal was reported. This would include utilizing the disabled Kepler in a way that could detect habitable planets around smaller, dimmer red dwarfs. On May 16, 2014, NASA announced the approval of the K2 extension.As of January 2015, Kepler and its follow-up observations had found 1,013 confirmed exoplanets in about 440 stellar systems, along with a further 3,199 unconfirmed planet candidates. Four planets have been confirmed through Kepler 's K2 mission. In 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. It is estimated that 11 billion of these planets may be orbiting Sun-like stars. The nearest such planet may be 3.7 parsecs (12 ly) away, according to the scientists.On January 6, 2015, NASA announced the 1000th confirmed exoplanet discovered by the Kepler Space Telescope. Four of the newly confirmed exoplanets were found to orbit within habitable zones of their related stars: three of the four, Kepler-438b, Kepler-442b and Kepler-452b, are near-Earth-size and likely rocky; the fourth, Kepler-440b, is a super-Earth.