- ANU Repository
... (2015, hereafter DC15) performed an analysis of the Kepler detection efficiency independent of the Kepler project pipeline. They identified candidate transit signals and estimated the detection completeness by injecting and recovering artificial transit signals. They incorporated available spectroscopi ...
... (2015, hereafter DC15) performed an analysis of the Kepler detection efficiency independent of the Kepler project pipeline. They identified candidate transit signals and estimated the detection completeness by injecting and recovering artificial transit signals. They incorporated available spectroscopi ...
Possible climates on terrestrial exoplanets
... discoveries have also profoundly changed our vision of the formation, structure and composition of low-mass planets: while it has been long thought, mostly based on the observations of our own Solar System, that there should be a gap between telluric planets with a thin, if any, secondary atmosphere ...
... discoveries have also profoundly changed our vision of the formation, structure and composition of low-mass planets: while it has been long thought, mostly based on the observations of our own Solar System, that there should be a gap between telluric planets with a thin, if any, secondary atmosphere ...
Enhanced lithium depletion in Sun-like stars with orbiting planets.
... from either the accretion of planets/planetesimals on to the star or the protostellar molecular cloud. This metallicity excess is also present in the solar analogue planet-bearing stars (see Fig. 2c). Can high metallicity be responsible for enhanced Li depletion in these stars? The increase of metal ...
... from either the accretion of planets/planetesimals on to the star or the protostellar molecular cloud. This metallicity excess is also present in the solar analogue planet-bearing stars (see Fig. 2c). Can high metallicity be responsible for enhanced Li depletion in these stars? The increase of metal ...
Giuseppe Piazzi and the Discovery of Ceres
... Piazzi, who had not yet received any reaction either from Bode or Oriani, was obliged to send his complete set of observations to Lalande. It should be understood that Lalande was not only a good friend of Piazzi but was also the Gran Maestro of the Lodge of the Neuf Seurs; Piazzi himself was a free ...
... Piazzi, who had not yet received any reaction either from Bode or Oriani, was obliged to send his complete set of observations to Lalande. It should be understood that Lalande was not only a good friend of Piazzi but was also the Gran Maestro of the Lodge of the Neuf Seurs; Piazzi himself was a free ...
Study of Planetary Systems and Solar System Objects with JWST
... dynamical properties is that the cold classical objects appear systematically redder than other objects (color discrimination is discussed further below). Otherwise, the full range of spectral types (red, neutral, featureless, volatile-bearing) seems to be equally well represented in the dynamical c ...
... dynamical properties is that the cold classical objects appear systematically redder than other objects (color discrimination is discussed further below). Otherwise, the full range of spectral types (red, neutral, featureless, volatile-bearing) seems to be equally well represented in the dynamical c ...
The Solar System
... The IAU therefore resolves that planets and other bodies in our Solar System, except satellites be defined into three distinct categories in the following way: (1) A "planet“ 1 is a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its selfgravity to overcome rigid body ...
... The IAU therefore resolves that planets and other bodies in our Solar System, except satellites be defined into three distinct categories in the following way: (1) A "planet“ 1 is a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its selfgravity to overcome rigid body ...
Investigation of evolution of orbits similar to that of (4179) Toutatis
... 3:1 resonance did persist throughout the run; note again a longer term decrease (perhaps eventually cyclic) in eccentricity and the periodic behavior of the p − q track. However, it is probably not directly indicated that the inner planets caused the disruption at t = 2, 700 years in test 4. Superim ...
... 3:1 resonance did persist throughout the run; note again a longer term decrease (perhaps eventually cyclic) in eccentricity and the periodic behavior of the p − q track. However, it is probably not directly indicated that the inner planets caused the disruption at t = 2, 700 years in test 4. Superim ...
iaf2001_paper (doc - 1.8 MB)
... following scientific bandwidth : [0.1 ;10] mHz, covering both pressure modes of stars of spectral types F and G (higher frequencies) and gravity modes of stars of spectral type A (lower frequencies). For stochastically excited modes, the resolution is a function of the observation window length, the ...
... following scientific bandwidth : [0.1 ;10] mHz, covering both pressure modes of stars of spectral types F and G (higher frequencies) and gravity modes of stars of spectral type A (lower frequencies). For stochastically excited modes, the resolution is a function of the observation window length, the ...
Neptune and Uranus
... The Moon Systems of Uranus and Neptune • Uranus has 27 moons, five of which are major: Miranda, Ariel, Umbriel, Titania, and Oberon • Similar to Saturn’s medium-sized moons, except that all are much less reflective • Umbriel is the darkest ...
... The Moon Systems of Uranus and Neptune • Uranus has 27 moons, five of which are major: Miranda, Ariel, Umbriel, Titania, and Oberon • Similar to Saturn’s medium-sized moons, except that all are much less reflective • Umbriel is the darkest ...
Revision sheet - Nour Al Maaref International School
... B. geocentric star system C. heliocentric solar system D. galaxy that is nearest to Earth ____ 42. Which information or method did Ptolemy use to develop a model of the solar system? A. parallax problem B. heliocentric theory C. mathematical models D. telescope observations ____ 43. Copernicus chall ...
... B. geocentric star system C. heliocentric solar system D. galaxy that is nearest to Earth ____ 42. Which information or method did Ptolemy use to develop a model of the solar system? A. parallax problem B. heliocentric theory C. mathematical models D. telescope observations ____ 43. Copernicus chall ...
Solar System
... the largest planet, is 5.2 astronomical units (780,000,000 3 Formation and evolution km) from the Sun and has a radius of 71,000 km (0.00047 AU), whereas the most distant planet, Neptune, is 30 AU Main article: Formation and evolution of the Solar (4.5×109 km) from the Sun. System With a few excepti ...
... the largest planet, is 5.2 astronomical units (780,000,000 3 Formation and evolution km) from the Sun and has a radius of 71,000 km (0.00047 AU), whereas the most distant planet, Neptune, is 30 AU Main article: Formation and evolution of the Solar (4.5×109 km) from the Sun. System With a few excepti ...
OUR COSMIC NEIGHBORS Story of the Stars
... through the ages from the ancient Egyptians, Babylonians, Greeks, Romans and others. These early peoples endeavored to relate the curious groupings of stars to things that were familiar to them such as the lion, bear, eagle, warrior, etc. And thus were born romantic mythological accounts of truths a ...
... through the ages from the ancient Egyptians, Babylonians, Greeks, Romans and others. These early peoples endeavored to relate the curious groupings of stars to things that were familiar to them such as the lion, bear, eagle, warrior, etc. And thus were born romantic mythological accounts of truths a ...
The Habitability of Planets Orbiting M
... orbiting other stars1 . Many of these planets are especially captivating because of their orbital distances, which place them in their stars’ canonical habitable zone—the region around a star where an orbiting planet with an Earth-like atmosphere (CO2 -H2 O-N2 ) could maintain water in liquid form o ...
... orbiting other stars1 . Many of these planets are especially captivating because of their orbital distances, which place them in their stars’ canonical habitable zone—the region around a star where an orbiting planet with an Earth-like atmosphere (CO2 -H2 O-N2 ) could maintain water in liquid form o ...
Stellar Evolution: Evolution: Birth, Life, and Death of Stars
... Young neutron stars rotate rapidly and emit regular pulses of radiation in radio, and are known as pulsars. ...
... Young neutron stars rotate rapidly and emit regular pulses of radiation in radio, and are known as pulsars. ...
Chapter-by-Chapter Guide
... galaxies, then clusters and groups of galaxies, and then the roughly 100 billion individual galaxies, most of which are many thousands of light-years across. Each galaxy contains billions of stars and many or most stars may be orbited by planets. When we say that the universe is expanding, we mean t ...
... galaxies, then clusters and groups of galaxies, and then the roughly 100 billion individual galaxies, most of which are many thousands of light-years across. Each galaxy contains billions of stars and many or most stars may be orbited by planets. When we say that the universe is expanding, we mean t ...
A radiogenic heating evolution model for cosmochemically Earth
... and thus, one is forced to make assumptions based on our Solar System with the understanding that it may not be representative of the hundreds of billions of others in the Galaxy. Furthermore, most exoplanet models inaccurately assume a heat production rate at steady-state rather than one that decli ...
... and thus, one is forced to make assumptions based on our Solar System with the understanding that it may not be representative of the hundreds of billions of others in the Galaxy. Furthermore, most exoplanet models inaccurately assume a heat production rate at steady-state rather than one that decli ...
Nibiru Hijacked
... theories are predicated on the premise that ancient myths are not myths but historical and scientific texts. One of Sitchin’s core assertions is that Nibiru is a planet that orbits our Sun every 3,450 years. The following summarizes Sitchin’s primary theory: Working from the same archaeological disc ...
... theories are predicated on the premise that ancient myths are not myths but historical and scientific texts. One of Sitchin’s core assertions is that Nibiru is a planet that orbits our Sun every 3,450 years. The following summarizes Sitchin’s primary theory: Working from the same archaeological disc ...
Definition of planet
The definition of planet, since the word was coined by the ancient Greeks, has included within its scope a wide range of celestial bodies. Greek astronomers employed the term asteres planetai (ἀστέρες πλανῆται), ""wandering stars"", for star-like objects which apparently moved over the sky. Over the millennia, the term has included a variety of different objects, from the Sun and the Moon to satellites and asteroids.By the end of the 19th century the word planet, though it had yet to be defined, had become a working term applied only to a small set of objects in the Solar System. After 1992, however, astronomers began to discover many additional objects beyond the orbit of Neptune, as well as hundreds of objects orbiting other stars. These discoveries not only increased the number of potential planets, but also expanded their variety and peculiarity. Some were nearly large enough to be stars, while others were smaller than Earth's moon. These discoveries challenged long-perceived notions of what a planet could be.The issue of a clear definition for planet came to a head in 2005 with the discovery of the trans-Neptunian object Eris, a body more massive than the smallest then-accepted planet, Pluto. In its 2006 response, the International Astronomical Union (IAU), recognised by astronomers as the world body responsible for resolving issues of nomenclature, released its decision on the matter. This definition, which applies only to the Solar System, states that a planet is a body that orbits the Sun, is massive enough for its own gravity to make it round, and has ""cleared its neighbourhood"" of smaller objects around its orbit. Under this new definition, Pluto and the other trans-Neptunian objects do not qualify as planets. The IAU's decision has not resolved all controversies, and while many scientists have accepted the definition, some in the astronomical community have rejected it outright.