La Sapienza – 2015
... A pulsar is a neutron star: the small, ultradense remnant of a star that has exploded as a supernova. Pulsars emit radio waves extremely regularly as they rotate. Slight anomalies in the timing of its observed radio pulses can be used to track the pulsar's motion. Like an ordinary star, a pulsar wil ...
... A pulsar is a neutron star: the small, ultradense remnant of a star that has exploded as a supernova. Pulsars emit radio waves extremely regularly as they rotate. Slight anomalies in the timing of its observed radio pulses can be used to track the pulsar's motion. Like an ordinary star, a pulsar wil ...
Super-Earth and Sub-Neptune Exoplanets: a First Look from the
... detect it. A large telescope, equipped with a sensitive spectrograph, could observe the spectrum of the planet’s atmosphere, and we could attempt to decode the information it carries. With careful measurements and detailed modeling, we might one day be able to point to the spectrum of a planet and a ...
... detect it. A large telescope, equipped with a sensitive spectrograph, could observe the spectrum of the planet’s atmosphere, and we could attempt to decode the information it carries. With careful measurements and detailed modeling, we might one day be able to point to the spectrum of a planet and a ...
Solar Superstorms and Planetary Alignments
... 115.877484 days. Due to the eccentricity, the planet's speed differs in different parts of its orbit and hence the different synodic orbits durations range from 104 to 132 days. Moreover, the closeness of Mercury to the Sun causes its visibility being obscured by the glare of the Sun. This was why M ...
... 115.877484 days. Due to the eccentricity, the planet's speed differs in different parts of its orbit and hence the different synodic orbits durations range from 104 to 132 days. Moreover, the closeness of Mercury to the Sun causes its visibility being obscured by the glare of the Sun. This was why M ...
Planet Hunters: The First Two Planet Candidates Identified by the
... four years of data for the entire set of Kepler targets could be robustly searched for orbital periods up to two years. While the human brain is exceptionally good at detecting patterns, it is impractical for a single individual to review each of the ∼ 150, 000 light curves in every quarterly releas ...
... four years of data for the entire set of Kepler targets could be robustly searched for orbital periods up to two years. While the human brain is exceptionally good at detecting patterns, it is impractical for a single individual to review each of the ∼ 150, 000 light curves in every quarterly releas ...
Competing Cosmologies
... Earth- vs. Sun-Centered To the ancients, which of the following would have been an argument in favor of a Sun-centered cosmology? ...
... Earth- vs. Sun-Centered To the ancients, which of the following would have been an argument in favor of a Sun-centered cosmology? ...
Three newly discovered sub-Jupiter-mass planets: WASP
... WASP-84 are shown in Table 6. Taking the average of the periods for each star gives our best estimates for the rotation periods of 23.07 ± 0.16 d for WASP-69 and 14.36 ± 0.35 d for WASP-84. The WASP-69 data sets obtained in 2008 with both cameras 224 and 226 each show periods of ∼23/2 d, presumably ...
... WASP-84 are shown in Table 6. Taking the average of the periods for each star gives our best estimates for the rotation periods of 23.07 ± 0.16 d for WASP-69 and 14.36 ± 0.35 d for WASP-84. The WASP-69 data sets obtained in 2008 with both cameras 224 and 226 each show periods of ∼23/2 d, presumably ...
Kepler423b: a half-Jupiter mass planet transiting a very old solar
... high-precision radial velocity measurements taken with the FIES spectrograph at the Nordic Optical Telescope. We simultaneously modelled the photometric and spectroscopic data-sets using Bayesian approach coupled with Markov chain Monte Carlo sampling. We found that the Kepler pre-search data condit ...
... high-precision radial velocity measurements taken with the FIES spectrograph at the Nordic Optical Telescope. We simultaneously modelled the photometric and spectroscopic data-sets using Bayesian approach coupled with Markov chain Monte Carlo sampling. We found that the Kepler pre-search data condit ...
Kepler-423b: a half-Jupiter mass planet transiting a very old solar
... June and September 2013, under OPTICON and CAT observing programmes 2013A025 and 79-NOT14/13A, respectively. We used the 1.300 high-res fibre, which provides, in conjunction with a 50-µm slit at the fibre exit, a resolving power of R = 67 000 in the spectral range 3600−7400 Å. Three consecutive expo ...
... June and September 2013, under OPTICON and CAT observing programmes 2013A025 and 79-NOT14/13A, respectively. We used the 1.300 high-res fibre, which provides, in conjunction with a 50-µm slit at the fibre exit, a resolving power of R = 67 000 in the spectral range 3600−7400 Å. Three consecutive expo ...
a transiting planet of a sun-like star
... can be a significant and unpredictable component to noise. We estimate all-sky photometric B, V, RC, and IC magnitudes for XO-1 and several nearby reference stars (Fig. 1 and Table 1), calibrated using two Landolt areas (Landolt 1992). Using a 0.35 m telescope on photometric nights 2006 February 25 ...
... can be a significant and unpredictable component to noise. We estimate all-sky photometric B, V, RC, and IC magnitudes for XO-1 and several nearby reference stars (Fig. 1 and Table 1), calibrated using two Landolt areas (Landolt 1992). Using a 0.35 m telescope on photometric nights 2006 February 25 ...
Learning Objectives - UNC Physics and Astronomy
... These images were taken six months apart, first when Earth was as far to one side of Alpha Centauri as it can get and again when Earth was as far to the other side of Alpha Centauri as it can get. Consequently, the baseline between the two observing positions is how many AU across? baseline in AU = ...
... These images were taken six months apart, first when Earth was as far to one side of Alpha Centauri as it can get and again when Earth was as far to the other side of Alpha Centauri as it can get. Consequently, the baseline between the two observing positions is how many AU across? baseline in AU = ...
CHEOPS Science Requirements Document
... 2011 and references therein). The origin of such configurations is still a matter of debate but they are usually interpreted as resulting from dynamical interactions in multi-planet systems after the gas disc is dissipated. In summary, it is indeed striking that the bulk of the exoplanets discovered ...
... 2011 and references therein). The origin of such configurations is still a matter of debate but they are usually interpreted as resulting from dynamical interactions in multi-planet systems after the gas disc is dissipated. In summary, it is indeed striking that the bulk of the exoplanets discovered ...
The Morning Stars
... downslope movement of the fragments. Mass-wasting, perhaps activated by venusian quakes or by unknown geologic processes, is likely the agent. Another geomorphic degradation process occurs on the scale of a centimeter or less and is responsible for the rounding of edges and the pitting of rock surfa ...
... downslope movement of the fragments. Mass-wasting, perhaps activated by venusian quakes or by unknown geologic processes, is likely the agent. Another geomorphic degradation process occurs on the scale of a centimeter or less and is responsible for the rounding of edges and the pitting of rock surfa ...
Primary and secondary eclipse spectroscopy with JWST: exploring
... Methods. We used analytic formula and model data for both the astrophysical scene and the instrument to plot S /N contour maps, while indicating how the S /N scales with the fixed parameters. We systematically compare stellar photon noise-only plots with plots that include detailed instrumental and ...
... Methods. We used analytic formula and model data for both the astrophysical scene and the instrument to plot S /N contour maps, while indicating how the S /N scales with the fixed parameters. We systematically compare stellar photon noise-only plots with plots that include detailed instrumental and ...
SeagerGUASAI - Sara Seager
... exoplanets discussed the possibility of giving popular names to exoplanets in addition to their existing catalogue designation (for instance HD 85512 b). Although no consensus was reached, the majority was not in favour of this possibility at the time. However, considering the ever increasing intere ...
... exoplanets discussed the possibility of giving popular names to exoplanets in addition to their existing catalogue designation (for instance HD 85512 b). Although no consensus was reached, the majority was not in favour of this possibility at the time. However, considering the ever increasing intere ...
The thopograpy of Venus revealed at 1 micron
... The maximum brightness contrast of the nightside against the scattered light background is ≈ 9% In any image we can notice two types of features: 1) The dark spots at low scale seem to do not change significantly with time and have sizes and shapes well defined. They belong easily to the surface. 2) ...
... The maximum brightness contrast of the nightside against the scattered light background is ≈ 9% In any image we can notice two types of features: 1) The dark spots at low scale seem to do not change significantly with time and have sizes and shapes well defined. They belong easily to the surface. 2) ...
AKATSUKI - Japan Aerospace Exploration Agency
... Nickname “AKATSUKI” The nickname has been studied and decided among the project team who has been involved in the development of the explorer. It was announced on October 23, 2009, well before its launch, in order for people to feel familiar with the explorer. “AKATSUKI” means dawn or daybreak, wh ...
... Nickname “AKATSUKI” The nickname has been studied and decided among the project team who has been involved in the development of the explorer. It was announced on October 23, 2009, well before its launch, in order for people to feel familiar with the explorer. “AKATSUKI” means dawn or daybreak, wh ...
Temperate Earth-sized planets transiting a nearby ultracool dwarf star
... Star-like objects with effective temperatures of less than 2,700 kelvin are referred to as ‘ultracool dwarfs’1. This heterogeneous group includes stars of extremely low mass as well as brown dwarfs (substellar objects not massive enough to sustain hydrogen fusion), and represents about 15 per cent o ...
... Star-like objects with effective temperatures of less than 2,700 kelvin are referred to as ‘ultracool dwarfs’1. This heterogeneous group includes stars of extremely low mass as well as brown dwarfs (substellar objects not massive enough to sustain hydrogen fusion), and represents about 15 per cent o ...
Temperate Earth-sized planets transiting a nearby ultracool
... contributions to the TRAPPIST project; the Infrared Telescope Facility (IRTF) operators B. Cabreira and D. Griep for assistance with the SpeX observations; UKIRT staff scientists W. Varricatt & T. Kerr, telescope operators S. Benigni, E. Moore and T. Carroll, and Cambridge Astronomy Survey Unit (CAS ...
... contributions to the TRAPPIST project; the Infrared Telescope Facility (IRTF) operators B. Cabreira and D. Griep for assistance with the SpeX observations; UKIRT staff scientists W. Varricatt & T. Kerr, telescope operators S. Benigni, E. Moore and T. Carroll, and Cambridge Astronomy Survey Unit (CAS ...
Mercury Transits on 9th May-2016
... light. The German astronomer Johannes Kepler (1571-1630) was the first person to predict a Mercury transit event, although he did not observe one himself. His prediction of a transit on November 7th 1631 enabled the French mathematician and astronomer Pierre Gassendi (1592-1655) to observe it, in th ...
... light. The German astronomer Johannes Kepler (1571-1630) was the first person to predict a Mercury transit event, although he did not observe one himself. His prediction of a transit on November 7th 1631 enabled the French mathematician and astronomer Pierre Gassendi (1592-1655) to observe it, in th ...
Powerpoint file
... There are only two astronomical bodies that have a radius ~ 1 REarth: 1. White Dwarf 2. A terrestrial planet White Dwarfs have a mass of ~ 1 Solar Mass, so the radial velocity amplitude should be ~ 100s km/s. This is excluded by low precision radial velocity measurements. ...
... There are only two astronomical bodies that have a radius ~ 1 REarth: 1. White Dwarf 2. A terrestrial planet White Dwarfs have a mass of ~ 1 Solar Mass, so the radial velocity amplitude should be ~ 100s km/s. This is excluded by low precision radial velocity measurements. ...
Astronews - Hawaiian Astronomical Society
... Subsequently, Gene joined the Apollo team with the purpose of educating the astronauts for the lunar missions and preparing them in lunar geology concepts. This ...
... Subsequently, Gene joined the Apollo team with the purpose of educating the astronauts for the lunar missions and preparing them in lunar geology concepts. This ...
Astronomy and the Fall of Babylon
... scholars have disagreed on its usefulness for dating events in the ancient Babylonian world. Erica Reiner and David Pingree, for example, claimed it was impossible to extract reliable chronological information from the tablet. Nevertheless, researchers have continued to rely on the Venus Tablet to g ...
... scholars have disagreed on its usefulness for dating events in the ancient Babylonian world. Erica Reiner and David Pingree, for example, claimed it was impossible to extract reliable chronological information from the tablet. Nevertheless, researchers have continued to rely on the Venus Tablet to g ...
transit observations of new planets
... A founding theme in astronomy is searching for worlds similar to ours. At first this was done for planets within our solar system. Now this search has expanded to include a much greater area our galaxy. One way in which the search is conducted is via the “Transit” method. A transit occurs when an ob ...
... A founding theme in astronomy is searching for worlds similar to ours. At first this was done for planets within our solar system. Now this search has expanded to include a much greater area our galaxy. One way in which the search is conducted is via the “Transit” method. A transit occurs when an ob ...
Activity I: Plotting a Light Curve due to a Transit
... The following activities will concern using the Transit method to find planets and determine important conditions on those planets. This section of Hands On Universe is focusing on the Transit method of planet detection. Please note that the Transit method is not the only method for discovering new ...
... The following activities will concern using the Transit method to find planets and determine important conditions on those planets. This section of Hands On Universe is focusing on the Transit method of planet detection. Please note that the Transit method is not the only method for discovering new ...
Transit of Venus
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A transit of Venus across the Sun takes place when the planet Venus passes directly between the Sun and a superior planet, becoming visible against (and hence obscuring a small portion of) the solar disk. During a transit, Venus can be seen from Earth as a small black disk moving across the face of the Sun. The duration of such transits is usually measured in hours (the transit of 2012 lasted 6 hours and 40 minutes). A transit is similar to a solar eclipse by the Moon. While the diameter of Venus is more than 3 times that of the Moon, Venus appears smaller, and travels more slowly across the face of the Sun, because it is much farther away from Earth.Transits of Venus are among the rarest of predictable astronomical phenomena. They occur in a pattern that generally repeats every 243 years, with pairs of transits eight years apart separated by long gaps of 121.5 years and 105.5 years. The periodicity is a reflection of the fact that the orbital periods of Earth and Venus are close to 8:13 and 243:395 commensurabilities.The last transit of Venus was on 5 and 6 June 2012, and was the last Venus transit of the 21st century; the prior transit took place on 8 June 2004. The previous pair of transits were in December 1874 and December 1882. The next transits of Venus will be 10–11 December 2117, and 8 December 2125.Venus transits are historically of great scientific importance as they were used to gain the first realistic estimates of the size of the Solar System. Observations of the 1639 transit, combined with the principle of parallax, provided an estimate of the distance between the Sun and the Earth that was more accurate than any other up to that time. The 2012 transit provided scientists with a number of other research opportunities, particularly in the refinement of techniques to be used in the search for exoplanets.