Tidal Venuses: Triggering a Climate Catastrophe via Tidal Heating
... librium state where they rotate faster than synchronous with an “equilibrium” or “pseudosynchronous” period. This aspect of tidal theory has been known for decades (e.g. Goldreich, 1966; Greenberg and Weidenschilling, 1984), but has only recently been pointed out for the case of exoplanets (Barnes ...
... librium state where they rotate faster than synchronous with an “equilibrium” or “pseudosynchronous” period. This aspect of tidal theory has been known for decades (e.g. Goldreich, 1966; Greenberg and Weidenschilling, 1984), but has only recently been pointed out for the case of exoplanets (Barnes ...
1. Chapter 10
... days at a time. We have learned through experiments and observations that the stars are like our Sun, giving off light and heat, but are very far away. Thousands of years ago, what must people have thought when they looked up at the sky? Many people in early civilizations were farmers. They needed t ...
... days at a time. We have learned through experiments and observations that the stars are like our Sun, giving off light and heat, but are very far away. Thousands of years ago, what must people have thought when they looked up at the sky? Many people in early civilizations were farmers. They needed t ...
Daily Communication Skills
... Example #1: You are on trial for a crime and learn that the jury is “disinterested” in your case. Is this good or bad news? The word “disinterested” means ‘unbiased, and that characteristic of a jury is good if you are ever on trial. Example #2: What do “rotation” and “revolution” mean? Is it correc ...
... Example #1: You are on trial for a crime and learn that the jury is “disinterested” in your case. Is this good or bad news? The word “disinterested” means ‘unbiased, and that characteristic of a jury is good if you are ever on trial. Example #2: What do “rotation” and “revolution” mean? Is it correc ...
Dynamical models of the nucleus of M31
... • this doesn’t apply because stars at small radii are eaten by the black hole • correct solution including absorbing boundary condition is (Bahcall & Wolf 1976) ...
... • this doesn’t apply because stars at small radii are eaten by the black hole • correct solution including absorbing boundary condition is (Bahcall & Wolf 1976) ...
The Transit Method
... Transiting planet orbits an early type star with rapid rotation which makes it impossible to measure the RV variations or you need lots and lots of measurements. ...
... Transiting planet orbits an early type star with rapid rotation which makes it impossible to measure the RV variations or you need lots and lots of measurements. ...
Lab Script
... is used by these groups to denote a change in the way the planets are influencing our lives. However, our favorite science (astronomy!) tells us that the planets continually orbiting around the Sun. They don't move backwards in space. So why do some planets go through apparent retrograde? It's becau ...
... is used by these groups to denote a change in the way the planets are influencing our lives. However, our favorite science (astronomy!) tells us that the planets continually orbiting around the Sun. They don't move backwards in space. So why do some planets go through apparent retrograde? It's becau ...
- EPJ Web of Conferences
... The blendanal program is an implementation of the blender program due to Torres et al. (2004, 2005, 2010) which pioneered the approach of fitting a blend model to the photometric observations of an object. Here we describe the blendanal code, highlighting a few differences from blender. Like blender ...
... The blendanal program is an implementation of the blender program due to Torres et al. (2004, 2005, 2010) which pioneered the approach of fitting a blend model to the photometric observations of an object. Here we describe the blendanal code, highlighting a few differences from blender. Like blender ...
DATA FROM CATALOGUES OF SOLAR SYSTEM OBJECTS IN
... Educational Programme). It is possible that they do not have a time for this topic during Physics ...
... Educational Programme). It is possible that they do not have a time for this topic during Physics ...
Astronomy Activities/Demonstrations
... amount of force that it rebounds. As the core contracts, all the outer atmospheric layers are also contracting and following the core. They are less dense and take a little longer to contract than the core. When the core (basketball) rebounds, the atmospheric layers (tennis ball) are still in-fallin ...
... amount of force that it rebounds. As the core contracts, all the outer atmospheric layers are also contracting and following the core. They are less dense and take a little longer to contract than the core. When the core (basketball) rebounds, the atmospheric layers (tennis ball) are still in-fallin ...
Educator`s Guide for Dark Star Adventure
... 2. Bring a ball to the edge of that table and let the ball drop. Have students notice the path and landing point of the ball (it should fall directly below the edge of the table) on the chart paper. 3. Push the ball so that it slowly rolls across the table and let it drop. Have students notice the p ...
... 2. Bring a ball to the edge of that table and let the ball drop. Have students notice the path and landing point of the ball (it should fall directly below the edge of the table) on the chart paper. 3. Push the ball so that it slowly rolls across the table and let it drop. Have students notice the p ...
2010-02 LAAS Bulletin I - Los Angeles Astronomical Society
... That’s about 1728 Kelvins or 2650 Fahrenheit. That’s far above the melting point for lead, copper, zinc, silver, gold, aluminum, silicon, nickel, iron, titanium, and a host of other materials that we, and our technology, depend on. There will be no life on that Earth. So there is little doubt but th ...
... That’s about 1728 Kelvins or 2650 Fahrenheit. That’s far above the melting point for lead, copper, zinc, silver, gold, aluminum, silicon, nickel, iron, titanium, and a host of other materials that we, and our technology, depend on. There will be no life on that Earth. So there is little doubt but th ...
CHAPTER XI
... distance separating the Earth from the Moon is measured with greater care than, for instance, the length of the road from Paris to Marseilles, or the weight of a pound of sugar at the grocer's. (And we may add without comment, that the astronomers are incomparably more conscientious in their measure ...
... distance separating the Earth from the Moon is measured with greater care than, for instance, the length of the road from Paris to Marseilles, or the weight of a pound of sugar at the grocer's. (And we may add without comment, that the astronomers are incomparably more conscientious in their measure ...
Gizmos: H-R Diagrams
... luminosity—or how bright a star is. However, astronomers did not yet understand exactly how these characteristics were related. Using the H-R Diagram Gizmo™, you will discover some of these relationships on your own. Start by moving your cursor over the stars in the Star collection. Information abou ...
... luminosity—or how bright a star is. However, astronomers did not yet understand exactly how these characteristics were related. Using the H-R Diagram Gizmo™, you will discover some of these relationships on your own. Start by moving your cursor over the stars in the Star collection. Information abou ...
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 ...
Document
... Even today, how many papers have a regular astrology column? But how many have a regular astronomy column? ...
... Even today, how many papers have a regular astrology column? But how many have a regular astronomy column? ...
H-RDiagramSE
... 5. Describe: More than 90 percent of all stars in the universe, including the Sun, are main sequence stars. As main sequence stars age, they move up and to the right on the H-R diagram and become giants or supergiants. Giants and supergiants form when the center of a star collapses and its outer par ...
... 5. Describe: More than 90 percent of all stars in the universe, including the Sun, are main sequence stars. As main sequence stars age, they move up and to the right on the H-R diagram and become giants or supergiants. Giants and supergiants form when the center of a star collapses and its outer par ...
Estimating Eccentricity of Planetary and Stellar Cores
... in planetary science. There is also no plausible explanation for magnetic pole reversals that are so well recorded in the magnetized mineral deposits around the globe [6]. Since observations prove that the Earth’s magnetic field originates in the core, an assumption of a concentric core provoked sci ...
... in planetary science. There is also no plausible explanation for magnetic pole reversals that are so well recorded in the magnetized mineral deposits around the globe [6]. Since observations prove that the Earth’s magnetic field originates in the core, an assumption of a concentric core provoked sci ...
Formation of Giant Planets - Lunar and Planetary Institute
... theory of giant planet formation that is favored by most researchers is the core nucleated accretion model, in which the planet’s initial phase of growth resembles that of a terrestrial planet, but the planet becomes sufficiently massive (several M ) that it is able to accumulate substantial amounts ...
... theory of giant planet formation that is favored by most researchers is the core nucleated accretion model, in which the planet’s initial phase of growth resembles that of a terrestrial planet, but the planet becomes sufficiently massive (several M ) that it is able to accumulate substantial amounts ...
Understanding the H-R Diagram
... In other words, how hot, how luminous and which stages a star will go through and eventually become (its life span) is dependent upon the star's original mass at the time of formation. "The Hertzsprung -Russell (H-R) Diagram is a graph that plots stars color (spectral type or surface temperature) vs ...
... In other words, how hot, how luminous and which stages a star will go through and eventually become (its life span) is dependent upon the star's original mass at the time of formation. "The Hertzsprung -Russell (H-R) Diagram is a graph that plots stars color (spectral type or surface temperature) vs ...
Properties of the Asteroids
... the time taken for it to eclipse the light of a background star if it moves in front, in what is known as an occultation. If its orbital parameters are known – how far away it is, how fast it’s moving – then the duration of the eclipse can allow you to estimate size of the object. There may be very ...
... the time taken for it to eclipse the light of a background star if it moves in front, in what is known as an occultation. If its orbital parameters are known – how far away it is, how fast it’s moving – then the duration of the eclipse can allow you to estimate size of the object. There may be very ...
Yr 9 2008 FINAL PAPER
... QUESTION ONE The characteristics of living things are movement, respiration, sensitivity, growth, reproduction, excretion and nutrition (the mnemonic MRS GREN can be used to remember them). (a) ...
... QUESTION ONE The characteristics of living things are movement, respiration, sensitivity, growth, reproduction, excretion and nutrition (the mnemonic MRS GREN can be used to remember them). (a) ...
Stars: Their Life and Afterlife
... After ~4.6 billion years of burning hydrogen in its core, the Sun’s core is now ~65% helium, but enough hydrogen remains for another 7 billion years of main-sequence burning. Outside of the core, the Sun’s composition remains unchanged. Stars are hottest in their cores and their material cools as on ...
... After ~4.6 billion years of burning hydrogen in its core, the Sun’s core is now ~65% helium, but enough hydrogen remains for another 7 billion years of main-sequence burning. Outside of the core, the Sun’s composition remains unchanged. Stars are hottest in their cores and their material cools as on ...
ON THE ORIGIN OF THE MOON
... additional mathematical computations (5) have shown that large gas planets can form not in times order 10 million years, as it was before estimated, but just in about one century! And quite strong arguments by Ackerman (6,7) even indicate that the so called gas planets may have a solid inner part, c ...
... additional mathematical computations (5) have shown that large gas planets can form not in times order 10 million years, as it was before estimated, but just in about one century! And quite strong arguments by Ackerman (6,7) even indicate that the so called gas planets may have a solid inner part, c ...
Lecture 4
... • Astrometry: Astrometry consists of precisely measuring a star's position in the sky and observing the ways in which that position changes over time. – If the star has a planet, then the gravitational influence of the planet will cause the star itself to move in a tiny circular or elliptical orbit ...
... • Astrometry: Astrometry consists of precisely measuring a star's position in the sky and observing the ways in which that position changes over time. – If the star has a planet, then the gravitational influence of the planet will cause the star itself to move in a tiny circular or elliptical orbit ...
Planetary habitability
Planetary habitability is the measure of a planet's or a natural satellite's potential to develop and sustain life. Life may develop directly on a planet or satellite or be transferred to it from another body, a theoretical process known as panspermia. As the existence of life beyond Earth is unknown, planetary habitability is largely an extrapolation of conditions on Earth and the characteristics of the Sun and Solar System which appear favourable to life's flourishing—in particular those factors that have sustained complex, multicellular organisms and not just simpler, unicellular creatures. Research and theory in this regard is a component of planetary science and the emerging discipline of astrobiology.An absolute requirement for life is an energy source, and the notion of planetary habitability implies that many other geophysical, geochemical, and astrophysical criteria must be met before an astronomical body can support life. In its astrobiology roadmap, NASA has defined the principal habitability criteria as ""extended regions of liquid water, conditions favourable for the assembly of complex organic molecules, and energy sources to sustain metabolism.""In determining the habitability potential of a body, studies focus on its bulk composition, orbital properties, atmosphere, and potential chemical interactions. Stellar characteristics of importance include mass and luminosity, stable variability, and high metallicity. Rocky, terrestrial-type planets and moons with the potential for Earth-like chemistry are a primary focus of astrobiological research, although more speculative habitability theories occasionally examine alternative biochemistries and other types of astronomical bodies.The idea that planets beyond Earth might host life is an ancient one, though historically it was framed by philosophy as much as physical science. The late 20th century saw two breakthroughs in the field. The observation and robotic spacecraft exploration of other planets and moons within the Solar System has provided critical information on defining habitability criteria and allowed for substantial geophysical comparisons between the Earth and other bodies. The discovery of extrasolar planets, beginning in the early 1990s and accelerating thereafter, has provided further information for the study of possible extraterrestrial life. These findings confirm that the Sun is not unique among stars in hosting planets and expands the habitability research horizon beyond the Solar System.The chemistry of life may have begun shortly after the Big Bang, 13.8 billion years ago, during a habitable epoch when the Universe was only 10–17 million years old. According to the panspermia hypothesis, microscopic life—distributed by meteoroids, asteroids and other small Solar System bodies—may exist throughout the universe. Nonetheless, Earth is the only place in the universe known to harbor life. Estimates of habitable zones around other stars, along with the discovery of hundreds of extrasolar planets and new insights into the extreme habitats here on Earth, suggest that there may be many more habitable places in the universe than considered possible until very recently. On 4 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. 11 billion of these estimated planets may be orbiting Sun-like stars. The nearest such planet may be 12 light-years away, according to the scientists.