Summer 2014 Mercury - Astronomical Society of the Pacific
... even years ago in this column (“Who Discovered Jupiter’s Satellites?” Spring, 2007), I mentioned that Simon Marius (15731624) was a close rival to Galileo when it came to finding the four large satellites of Jupiter. As the court mathematician in Ansbach (part of Bavaria since 1806), Marius began ma ...
... even years ago in this column (“Who Discovered Jupiter’s Satellites?” Spring, 2007), I mentioned that Simon Marius (15731624) was a close rival to Galileo when it came to finding the four large satellites of Jupiter. As the court mathematician in Ansbach (part of Bavaria since 1806), Marius began ma ...
Astronomy 112: The Physics of Stars Class 19 Notes: The Stellar
... IMF for stars that are rare, and thus are unlikely to be present in the few clusters where we can use the first method. [Slides 1 and 2 – IMFs from clusters and field stars] Regardless of which method is used, observations tend to converge on the same result for the IMF of stars larger than ∼ 1 M . ...
... IMF for stars that are rare, and thus are unlikely to be present in the few clusters where we can use the first method. [Slides 1 and 2 – IMFs from clusters and field stars] Regardless of which method is used, observations tend to converge on the same result for the IMF of stars larger than ∼ 1 M . ...
EX PLANET E - Institute of Physics
... percentage of brightness on the y-axis and the time on the x-axis. An idealised light curve for a Jupiter-like planet crossing the disc of a Sun-like star is shown in figure 1a. On their worksheet, students are provided with a light curve and asked to sketch curves for a faster and a bigger planet. ...
... percentage of brightness on the y-axis and the time on the x-axis. An idealised light curve for a Jupiter-like planet crossing the disc of a Sun-like star is shown in figure 1a. On their worksheet, students are provided with a light curve and asked to sketch curves for a faster and a bigger planet. ...
Extrasolar planets - Astronomisk Ungdom
... Despite the wide usage, the method has its limits, for example observation can only be done in an angle that makes it achievable to see the orbit of the celestial body. If the orbit does not cross the observers’ sight then it will not be seen. Due to this restriction the very beneficial transit meth ...
... Despite the wide usage, the method has its limits, for example observation can only be done in an angle that makes it achievable to see the orbit of the celestial body. If the orbit does not cross the observers’ sight then it will not be seen. Due to this restriction the very beneficial transit meth ...
Galactic Archaeology: Current Surveys
... the relative abundance of the ‘alpha-elements’ (created by successive addition of helium nuclei - alpha particles - in the interiors of massive stars) to iron to similar accuracy and precision (Lee et al. 2011). The SEGUE data for ∼ 7, 000 main-sequence turnoff stars at distances from the Sun of sev ...
... the relative abundance of the ‘alpha-elements’ (created by successive addition of helium nuclei - alpha particles - in the interiors of massive stars) to iron to similar accuracy and precision (Lee et al. 2011). The SEGUE data for ∼ 7, 000 main-sequence turnoff stars at distances from the Sun of sev ...
PDF
... 30] and non-‐linear metric perturbations [31, 32, 33], blue spectra of density fluctuations [34, 35, 36, 37, 38, 39], a softening of the equation of state [40, 34, 35], development of gravitational ins ...
... 30] and non-‐linear metric perturbations [31, 32, 33], blue spectra of density fluctuations [34, 35, 36, 37, 38, 39], a softening of the equation of state [40, 34, 35], development of gravitational ins ...
Compartive Planetology I: Our Solar. System
... ble Jupiter. (Jove was another name for the Roman god Jupiter.) An attempt to land a spacecraft on the surface of any of the Jo vian planets would be futile, because the materials of which these planets are made are mostly gaseous or liquid. The visible “surface” features of a Jovian planet are actu ...
... ble Jupiter. (Jove was another name for the Roman god Jupiter.) An attempt to land a spacecraft on the surface of any of the Jo vian planets would be futile, because the materials of which these planets are made are mostly gaseous or liquid. The visible “surface” features of a Jovian planet are actu ...
Age-Dating of Young Stars and Stellar Systems
... Often it is implicitly assumed that massive stars are hot. Yet they spend a few % of their lifetime as cool, core-He burning objects in the red part of the HRD. These stars are observationally identified as RSGs, or giants if they undergo core-helium or helium-shell flashes at masses below ∼8 M . I ...
... Often it is implicitly assumed that massive stars are hot. Yet they spend a few % of their lifetime as cool, core-He burning objects in the red part of the HRD. These stars are observationally identified as RSGs, or giants if they undergo core-helium or helium-shell flashes at masses below ∼8 M . I ...
Formation, Habitability, and Detection of Extrasolar Moons
... show present tectonic or volcanic activity. These four objects are not planets but moons: Jupiter’s Io and Europa, Saturn’s Enceladus, and Neptune’s Triton. Naturally, when discussing the potential of yet-unknown exomoons to host life, we shall begin with an inspection of the Solar System moons and ...
... show present tectonic or volcanic activity. These four objects are not planets but moons: Jupiter’s Io and Europa, Saturn’s Enceladus, and Neptune’s Triton. Naturally, when discussing the potential of yet-unknown exomoons to host life, we shall begin with an inspection of the Solar System moons and ...
A STEP - Observatoire de la Côte d`Azur
... know of more than ~200 planets or planetary systems orbiting solar type stars in our neighbourhood. The discovery of more planets, smaller planets and the ability to characterize them directly impacts our ability to understand how planets form, how the Solar System formed, and to better prepare futu ...
... know of more than ~200 planets or planetary systems orbiting solar type stars in our neighbourhood. The discovery of more planets, smaller planets and the ability to characterize them directly impacts our ability to understand how planets form, how the Solar System formed, and to better prepare futu ...
Possible climates on terrestrial exoplanets
... atmospheres that may exist on terrestrial exoplanets. For this, speculation is unavoidable because no direct observations of terrestrial atmospheres are available outside the solar system. The limited sample that we can observe here suggests that a wide diversity of planetary environment is possible ...
... atmospheres that may exist on terrestrial exoplanets. For this, speculation is unavoidable because no direct observations of terrestrial atmospheres are available outside the solar system. The limited sample that we can observe here suggests that a wide diversity of planetary environment is possible ...
Geometry of orbits - Harpursville Middle School
... Chunks of rock and metal that circle the sun Range in size from hundreds of km to mm Most are in a belt between Mars and Jupiter Rarely cross Earth’s orbit May have caused the extinction of dinosaurs ...
... Chunks of rock and metal that circle the sun Range in size from hundreds of km to mm Most are in a belt between Mars and Jupiter Rarely cross Earth’s orbit May have caused the extinction of dinosaurs ...
Full PDF - Royal Society Publishing
... atmospheres that may exist on terrestrial exoplanets. For this, speculation is unavoidable because no direct observations of terrestrial atmospheres are available outside the solar system. The limited sample that we can observe here suggests that a wide diversity of planetary environment is possible ...
... atmospheres that may exist on terrestrial exoplanets. For this, speculation is unavoidable because no direct observations of terrestrial atmospheres are available outside the solar system. The limited sample that we can observe here suggests that a wide diversity of planetary environment is possible ...
Dark Matter In The 21st Century
... Between roughly 1950 and 1980, carried out many of the most detailed and influential QuickTime™ and a decompressor studies of the dynamics of stars in galaxies are needed to see this picture. In particular, she published a key paper in 1970 (with W.K. Ford) on the motions of stars in the Andromeda ...
... Between roughly 1950 and 1980, carried out many of the most detailed and influential QuickTime™ and a decompressor studies of the dynamics of stars in galaxies are needed to see this picture. In particular, she published a key paper in 1970 (with W.K. Ford) on the motions of stars in the Andromeda ...
Video Lesson Information Astronomy: Observations & Theories Astronomy 1
... Lesson 1 - The Study of the Universe This lesson takes students on a journey from planet Earth to the distant galaxies and superclusters. It is illustrated with stunning computer animation and photographs from NASA, the Jet Propulsion Laboratory (JPL), and astronomical observatories. This journey in ...
... Lesson 1 - The Study of the Universe This lesson takes students on a journey from planet Earth to the distant galaxies and superclusters. It is illustrated with stunning computer animation and photographs from NASA, the Jet Propulsion Laboratory (JPL), and astronomical observatories. This journey in ...
A Stars
... • B Stars (15-30,000 K): Most of H is ionized, so only very weak H lines. • A Stars (10,000 K): Ideal excitation conditions, strongest H lines. • G Stars (6000 K): Too cool, little excited H, so only weak H lines. ...
... • B Stars (15-30,000 K): Most of H is ionized, so only very weak H lines. • A Stars (10,000 K): Ideal excitation conditions, strongest H lines. • G Stars (6000 K): Too cool, little excited H, so only weak H lines. ...
uv surface environment of earth-like planets orbiting
... considered to have a biological source. 2.2. Simulation Set-up We focus on four geological epochs from Earth’s history to model the UV environment on the surface of an Earth-like planet at the 1 AU equivalent distance from its host star. The geological evidence from 2.8–3.5 Ga is consistent with an ...
... considered to have a biological source. 2.2. Simulation Set-up We focus on four geological epochs from Earth’s history to model the UV environment on the surface of an Earth-like planet at the 1 AU equivalent distance from its host star. The geological evidence from 2.8–3.5 Ga is consistent with an ...
Thinking Outside the Sphere
... Hipparchus, Ptolemy developed an intricate system to account for the retrograde motion of the planets. In his scheme, each planet was attached to a small circle, called an epicycle, which moved it in a small orbit. The epicycle was attached in turn to a larger circle, or deferent, which moved around ...
... Hipparchus, Ptolemy developed an intricate system to account for the retrograde motion of the planets. In his scheme, each planet was attached to a small circle, called an epicycle, which moved it in a small orbit. The epicycle was attached in turn to a larger circle, or deferent, which moved around ...
Solar system formation by accretion has no observational evidence
... neither empirically nor in theoretical modeling. Neither support the belief that accretion could occur. Yet dust and debris fill expanses of the solar system, Milky Way galaxy, and universe. In the Milky Way, this debris is the interstellar medium (ISM); between galaxies, it is the intergalactic med ...
... neither empirically nor in theoretical modeling. Neither support the belief that accretion could occur. Yet dust and debris fill expanses of the solar system, Milky Way galaxy, and universe. In the Milky Way, this debris is the interstellar medium (ISM); between galaxies, it is the intergalactic med ...
Chapter 8 Pre-galactic enrichment of the IGM 8.1 Summary
... of metals ejected by an early population of massive primordial stars. We show that, in the absence of further star formation, photoevaporation of baryons bound to dark matter filaments during reionization is the most important mechanism in determining the volume filling fraction by z = 3. Our two st ...
... of metals ejected by an early population of massive primordial stars. We show that, in the absence of further star formation, photoevaporation of baryons bound to dark matter filaments during reionization is the most important mechanism in determining the volume filling fraction by z = 3. Our two st ...
A Compilation of Relevant Articles from MMM`s first 25 years, issues
... We've all seen the phrase "Earthlike Worlds" but just what does it mean? Different things to different people, of course. And that's because it is intrinsically imprecise, since there are so many varying definitions of just what the "essence of Earth" is. Some people use the term in contradistinctio ...
... We've all seen the phrase "Earthlike Worlds" but just what does it mean? Different things to different people, of course. And that's because it is intrinsically imprecise, since there are so many varying definitions of just what the "essence of Earth" is. Some people use the term in contradistinctio ...
a transiting planet of a sun-like star
... A planet transits an 11th magnitude, G1 V star in the constellation Corona Borealis. We designate the planet XO-1b and the star XO-1, also known as GSC 02041-01657. XO-1 lacks a trigonometric distance; we estimate it to be 200 20 pc. Of the 10 stars currently known to host extrasolar transiting pl ...
... A planet transits an 11th magnitude, G1 V star in the constellation Corona Borealis. We designate the planet XO-1b and the star XO-1, also known as GSC 02041-01657. XO-1 lacks a trigonometric distance; we estimate it to be 200 20 pc. Of the 10 stars currently known to host extrasolar transiting pl ...
Is there life in space? Activity 1: The Vastness of Space
... Q. Are you certain about your answer and explanation? A. Student answers will vary. Students should be fairly certain of their answers because they can test the scenario with the model. Q. Explain what influenced your certainty rating in the last question. A. Student answers will vary. Q. A scienti ...
... Q. Are you certain about your answer and explanation? A. Student answers will vary. Students should be fairly certain of their answers because they can test the scenario with the model. Q. Explain what influenced your certainty rating in the last question. A. Student answers will vary. Q. A scienti ...
silicon and oxygen abundances in planet-host stars
... elements. They observe no difference in the overall trends of [X/Fe] between planet hosts and their volume-limited sample of stars without any known planetary-mass companions. Based on their results, stars with planets appear to be indistinguishable from other field stars and seem to simply lie on t ...
... elements. They observe no difference in the overall trends of [X/Fe] between planet hosts and their volume-limited sample of stars without any known planetary-mass companions. Based on their results, stars with planets appear to be indistinguishable from other field stars and seem to simply lie on t ...
Planetary system
A planetary system is a set of gravitationally bound non-stellar objects in orbit around a star or star system. Generally speaking, systems with one or more planets constitute a planetary system, although such systems may also consist of bodies such as dwarf planets, asteroids, natural satellites, meteoroids, comets, planetesimals and circumstellar disks. The Sun together with its planetary system, which includes Earth, is known as the Solar System. The term exoplanetary system is sometimes used in reference to other planetary systems.A total of 1968 exoplanets (in 1248 planetary systems, including 490 multiple planetary systems) have been identified as of 1 October 2015.Of particular interest to astrobiology is the habitable zone of planetary systems where planets could have surface liquid water.