November Celestial Calendar by Dave Mitsky All times are UT
... central Aquarius, about three degrees west of the fifth-magnitude star Sigma Aquarii and two degrees east of the fifth-magnitude star 38 Aquarii this month. Finder charts for Uranus and Neptune can be found on page 81 of the August issue of Astronomy, on page 50 of the October issue of Sky & Telesco ...
... central Aquarius, about three degrees west of the fifth-magnitude star Sigma Aquarii and two degrees east of the fifth-magnitude star 38 Aquarii this month. Finder charts for Uranus and Neptune can be found on page 81 of the August issue of Astronomy, on page 50 of the October issue of Sky & Telesco ...
Planetary Radii Across Five Orders of Magnitude in Mass and Stellar
... a narrow wavelength band that overlaps the strong sodium D-line absorptions at 589 nm. Across a broad visible wavelength band, for most planets, the transit radius effect would likely be only a few percent. For the models presented here, the radii correspond to a pressure of 1 bar. Based on models f ...
... a narrow wavelength band that overlaps the strong sodium D-line absorptions at 589 nm. Across a broad visible wavelength band, for most planets, the transit radius effect would likely be only a few percent. For the models presented here, the radii correspond to a pressure of 1 bar. Based on models f ...
MEarth
... yield from 2000 M dwarfs is 3.2 planets, which would complement Kepler’s expected harvest of habitable planets around Sun-like stars (Gillon et al. 2005). Correspondingly, a null result places an upper limit for the occurrence rate of such habitable planets at 15% (at 99% confidence). Note that late ...
... yield from 2000 M dwarfs is 3.2 planets, which would complement Kepler’s expected harvest of habitable planets around Sun-like stars (Gillon et al. 2005). Correspondingly, a null result places an upper limit for the occurrence rate of such habitable planets at 15% (at 99% confidence). Note that late ...
Full Programme and Abstracts - UK Exoplanet community meeting
... Amy Bonsor & Oliver Shorttle (Institute of Astronomy, University of Cambridge) Earth is the best studied planet we know. A century’s work on terrestrial samples has interrogated 90% of its history, and revealed the physics of processes from the formation of the core to the rise of atmospheric oxygen ...
... Amy Bonsor & Oliver Shorttle (Institute of Astronomy, University of Cambridge) Earth is the best studied planet we know. A century’s work on terrestrial samples has interrogated 90% of its history, and revealed the physics of processes from the formation of the core to the rise of atmospheric oxygen ...
- 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 ...
UK Exoplanet community meeting 2017
... Amy Bonsor & Oliver Shorttle (Institute of Astronomy, University of Cambridge) Earth is the best studied planet we know. A century’s work on terrestrial samples has interrogated 90% of its history, and revealed the physics of processes from the formation of the core to the rise of atmospheric oxygen ...
... Amy Bonsor & Oliver Shorttle (Institute of Astronomy, University of Cambridge) Earth is the best studied planet we know. A century’s work on terrestrial samples has interrogated 90% of its history, and revealed the physics of processes from the formation of the core to the rise of atmospheric oxygen ...
Characterization of the four new transiting planets KOI
... orbital periods of 3.8 and 3.2 days, and masses of 0.25 and 0.34 MJup . They are located in the low-mass range of known transiting, giant planets. KOI-192b has a similar mass (0.29 MJup ) but a longer orbital period of 10.3 days. This places it in a domain where only a few planets are known. KOI-830 ...
... orbital periods of 3.8 and 3.2 days, and masses of 0.25 and 0.34 MJup . They are located in the low-mass range of known transiting, giant planets. KOI-192b has a similar mass (0.29 MJup ) but a longer orbital period of 10.3 days. This places it in a domain where only a few planets are known. KOI-830 ...
UK Exoplanet community meeting 2017
... Amy Bonsor & Oliver Shorttle (Institute of Astronomy, University of Cambridge) Earth is the best studied planet we know. A century’s work on terrestrial samples has interrogated 90% of its history, and revealed the physics of processes from the formation of the core to the rise of atmospheric oxygen ...
... Amy Bonsor & Oliver Shorttle (Institute of Astronomy, University of Cambridge) Earth is the best studied planet we know. A century’s work on terrestrial samples has interrogated 90% of its history, and revealed the physics of processes from the formation of the core to the rise of atmospheric oxygen ...
How we think the planets were born
... The Geminids can be annually observed in the first half of December, with its peak activity being around December 14. The shower owes its name to the constellation Gemini from where the meteors appear to emerge from in the sky (the so-called “radiant”). Unlike most other meteor showers, the Geminids ...
... The Geminids can be annually observed in the first half of December, with its peak activity being around December 14. The shower owes its name to the constellation Gemini from where the meteors appear to emerge from in the sky (the so-called “radiant”). Unlike most other meteor showers, the Geminids ...
Compartive Planetology I: Our Solar. System
... a planet if you know its angular diameter as seen from Earth and its distance from Earth. For example, on March 16, 2007, Venus was 1.97 X iO km from Earth and had an angular diameter of 12.7 arcsec. Using the small-angle formula from Box 1-1, we can calculate the diameter of Venus to be 12,100 km ( ...
... a planet if you know its angular diameter as seen from Earth and its distance from Earth. For example, on March 16, 2007, Venus was 1.97 X iO km from Earth and had an angular diameter of 12.7 arcsec. Using the small-angle formula from Box 1-1, we can calculate the diameter of Venus to be 12,100 km ( ...
Effect of the stellar spin history on the tidal evolution of close
... been detected (Benedict et al. 1998; Kiraga & Stepien 2007; Charbonneau et al. 2009). In contrast to Sun-like stars that are mostly radiative except for a small (in terms of mass) convective region at the surface, very low-mass stars (M∗ < 0.35 M ) are entirely convective (Chabrier & Baraffe 1997). ...
... been detected (Benedict et al. 1998; Kiraga & Stepien 2007; Charbonneau et al. 2009). In contrast to Sun-like stars that are mostly radiative except for a small (in terms of mass) convective region at the surface, very low-mass stars (M∗ < 0.35 M ) are entirely convective (Chabrier & Baraffe 1997). ...
Night Sky Observations
... Greenwich Mean Time / Universal Time: The local time at the 0 meridian passing through Greenwich, England; it is the same everywhere, anytime! South African Standard Time: GMT +2 hours. If the GMT is 15h00, SAST will be 17h00. Constellation: A pattern of stars connected with imaginary lines to form ...
... Greenwich Mean Time / Universal Time: The local time at the 0 meridian passing through Greenwich, England; it is the same everywhere, anytime! South African Standard Time: GMT +2 hours. If the GMT is 15h00, SAST will be 17h00. Constellation: A pattern of stars connected with imaginary lines to form ...
Astronomical Geography: An Examination of the Early American
... book included only this short introductory paragraph on planetary satellites: "A satellite, or moon, is a body revolving round a planet, and, in company with the planet, round the sun . Of these there are 18 in our solar system, distributed in the following manner: 1 to Earth ; 4 to Jupiter; 7 to Sa ...
... book included only this short introductory paragraph on planetary satellites: "A satellite, or moon, is a body revolving round a planet, and, in company with the planet, round the sun . Of these there are 18 in our solar system, distributed in the following manner: 1 to Earth ; 4 to Jupiter; 7 to Sa ...
On the definition and use of the ecliptic in
... 1) The adoption of the ICRS and ICRF (IAU 1997 Resolution B2) International Celestial Reference System (ICRS)*: the idealized barycentric coordinate system to which celestial positions are referred. It is kinematically non-rotating with respect to the ensemble of distant extragalactic objects. It h ...
... 1) The adoption of the ICRS and ICRF (IAU 1997 Resolution B2) International Celestial Reference System (ICRS)*: the idealized barycentric coordinate system to which celestial positions are referred. It is kinematically non-rotating with respect to the ensemble of distant extragalactic objects. It h ...
Formation of Giant Planets - Lunar and Planetary Institute
... planets known by more than an order of magnitude. The distribution of known extrasolar planets is highly biased toward those planets that are most easily detectable using the Doppler radial velocity technique, which has been by far the most effective method of discovering exoplanets. These extrasola ...
... planets known by more than an order of magnitude. The distribution of known extrasolar planets is highly biased toward those planets that are most easily detectable using the Doppler radial velocity technique, which has been by far the most effective method of discovering exoplanets. These extrasola ...
Extrasolar planets - Astronomisk Ungdom
... enough for the search in total. However, steady research with suitable space telescopes and long observation can distinguish orbiting planets of smaller sizes from other phenomena. Moreover, the transit method has an advantage to be able to view many stars over a big area of the universe at the same ...
... enough for the search in total. However, steady research with suitable space telescopes and long observation can distinguish orbiting planets of smaller sizes from other phenomena. Moreover, the transit method has an advantage to be able to view many stars over a big area of the universe at the same ...
Constraints on Long-Period Planets from an L
... F, G, K, or M stars in the last five years (see for example Masciadri et al. (2005); Kasper et al. (2007); Biller et al. (2007); Lafrenière et al. (2007). Of these, most have used wavelengths in the 1.5-2.2 µm range, corresponding to the astronomical H and KS filters (Masciadri et al. 2005; Biller ...
... F, G, K, or M stars in the last five years (see for example Masciadri et al. (2005); Kasper et al. (2007); Biller et al. (2007); Lafrenière et al. (2007). Of these, most have used wavelengths in the 1.5-2.2 µm range, corresponding to the astronomical H and KS filters (Masciadri et al. 2005; Biller ...
Event Booklet - Exoplanets I Conference
... and Kp = 12.7 mag. Stellar spectroscopy provides precise stellar and planetary parameters for most of these systems. We show that K2 has increased by 50% the number of small planets known to orbit moderately bright stars (1–4 Re, J = 8–12 mag). Of particular interest are 37 planets smaller than 2 Re ...
... and Kp = 12.7 mag. Stellar spectroscopy provides precise stellar and planetary parameters for most of these systems. We show that K2 has increased by 50% the number of small planets known to orbit moderately bright stars (1–4 Re, J = 8–12 mag). Of particular interest are 37 planets smaller than 2 Re ...
Small Bodies in the Outer Solar System
... density of objects brighter than a given magnitude. For the Centaurs and KBOs the CLF is well known for mR < 26 mags. (Jewitt et al. 1998; Trujillo et al. 2001; Allen et al. 2002; Millis et al. 2002; Trujillo & Brown 2003). To determine the size distribution of the KBOs we assume they follow a diffe ...
... density of objects brighter than a given magnitude. For the Centaurs and KBOs the CLF is well known for mR < 26 mags. (Jewitt et al. 1998; Trujillo et al. 2001; Allen et al. 2002; Millis et al. 2002; Trujillo & Brown 2003). To determine the size distribution of the KBOs we assume they follow a diffe ...
McDonald I....Tisserand, P. et al ExELS an
... We model our exoplanet host population using a Monte Carlo approach, based on version 1106 of the Besanc¸on population synthesis Galaxy model (Robin et al. 2003), which incorporates a three-dimensional dust model to compute extinction and reddening (Marshall et al. 2005). The populations included in ...
... We model our exoplanet host population using a Monte Carlo approach, based on version 1106 of the Besanc¸on population synthesis Galaxy model (Robin et al. 2003), which incorporates a three-dimensional dust model to compute extinction and reddening (Marshall et al. 2005). The populations included in ...
- MNASSA Page
... The Astronomical Society of Southern Africa (ASSA) was formed in 1922 by the amalgamation of the Cape Astronomical Association (founded 1912) and the Johannesburg Astronomical Association (founded 1918). It is a body consisting of both amateur and professional astronomers. Publications: The Society ...
... The Astronomical Society of Southern Africa (ASSA) was formed in 1922 by the amalgamation of the Cape Astronomical Association (founded 1912) and the Johannesburg Astronomical Association (founded 1918). It is a body consisting of both amateur and professional astronomers. Publications: The Society ...
Formation, Habitability, and Detection of Extrasolar Moons
... the imagination of scientists and the public related to their possibility of being habitats for extrasolar life (Reynolds et al., 1987; Williams et al., 1997; Heller and Barnes, 2013). This idea has its roots in certain Solar System moons, which may—at least temporarily and locally—provide environme ...
... the imagination of scientists and the public related to their possibility of being habitats for extrasolar life (Reynolds et al., 1987; Williams et al., 1997; Heller and Barnes, 2013). This idea has its roots in certain Solar System moons, which may—at least temporarily and locally—provide environme ...
The Transiting Exoplanet Survey Satellite
... The Transiting Exoplanet Survey Satellite (TESS) will search for planets transiting bright and nearby stars. TESS has been selected by NASA for launch in 2017 as an Astrophysics Explorer mission. The spacecraft will be placed into a highly elliptical 13.7-day orbit around the Earth. During its two-y ...
... The Transiting Exoplanet Survey Satellite (TESS) will search for planets transiting bright and nearby stars. TESS has been selected by NASA for launch in 2017 as an Astrophysics Explorer mission. The spacecraft will be placed into a highly elliptical 13.7-day orbit around the Earth. During its two-y ...
Insights into Bode`s Law
... The matters might have stood there if not for the fact that this object was located at the heliocentric distance as predicted by Bode’s Law. Titus and Bode believed that Piazzi had found and then lost the planet. Thus both Titus and Bode make used of the discovery made by Piazzi and embarked on a jo ...
... The matters might have stood there if not for the fact that this object was located at the heliocentric distance as predicted by Bode’s Law. Titus and Bode believed that Piazzi had found and then lost the planet. Thus both Titus and Bode make used of the discovery made by Piazzi and embarked on a jo ...