Debris disks and the search for life in the universe Gianni Cataldi
... the young star. The circumstellar disk is thus also called a protoplanetary disk (figure 1.1), which typically consist of 99% gas and 1% dust. The small dust grains gradually grow and eventually form planetesimals1 that are thought to be the building blocks of planets. By definition, planetesimals a ...
... the young star. The circumstellar disk is thus also called a protoplanetary disk (figure 1.1), which typically consist of 99% gas and 1% dust. The small dust grains gradually grow and eventually form planetesimals1 that are thought to be the building blocks of planets. By definition, planetesimals a ...
Search for an exosphere around 51 Pegasi B with ISO
... have been observed to have photometric variations compatible with planetary eclipses. Only recently a transit event has been observed in HD209458 (G0V) (Henry et al. 1999). Evolution models predict that the planetary companions are able to survive the huge stellar insolation, and that they should ha ...
... have been observed to have photometric variations compatible with planetary eclipses. Only recently a transit event has been observed in HD209458 (G0V) (Henry et al. 1999). Evolution models predict that the planetary companions are able to survive the huge stellar insolation, and that they should ha ...
The Main Point Comets are
... • Ion tails (or plasma tails) are gases evaporated from the nucleus, ionized, and pushed in the anti-Sun direction by the solar wind Astro 102/104 ...
... • Ion tails (or plasma tails) are gases evaporated from the nucleus, ionized, and pushed in the anti-Sun direction by the solar wind Astro 102/104 ...
6th Grade Science
... • This interactive will allow students to view the moon, earth, and sun’s relative motion, and answer questions related to phases of the moon. http://tinyurl.com/ut6th1-1 • This interactive will allow students to test their knowledge of the phases of the moon, by dragging the phase to their place in ...
... • This interactive will allow students to view the moon, earth, and sun’s relative motion, and answer questions related to phases of the moon. http://tinyurl.com/ut6th1-1 • This interactive will allow students to test their knowledge of the phases of the moon, by dragging the phase to their place in ...
oC - Geogreenapps
... They can, therefore, be used or not, at the discretion of the teacher. To adapt the work to private learners, and to schools that cannot purchase the large maps, it is now issued with the large maps in miniature, interspersed among the leMOns. These being exact copies of the originals, though upon a ...
... They can, therefore, be used or not, at the discretion of the teacher. To adapt the work to private learners, and to schools that cannot purchase the large maps, it is now issued with the large maps in miniature, interspersed among the leMOns. These being exact copies of the originals, though upon a ...
PDF Manual
... If you have the HP-48GX with a large (512kB or more) RAM card in slot 2 or a HP-49G, you can also upload up to three more libraries which allow you to access the data of the Revised New General Catalogue: RNGC1.lib, RNGC2.lib and RNGC2.lib. The first and smallest contains the most important data lik ...
... If you have the HP-48GX with a large (512kB or more) RAM card in slot 2 or a HP-49G, you can also upload up to three more libraries which allow you to access the data of the Revised New General Catalogue: RNGC1.lib, RNGC2.lib and RNGC2.lib. The first and smallest contains the most important data lik ...
ASTRONOMICAL REFERENCE SYSTEMS AND FRAMES
... obvious necessity of two others, describing the motion of a conventionally chosen intermediary axis with respect to both systems; P This axis must be naturally chosen so that: ‚ it is close to instantaneous axis of rotation, ‚ its motion in terrestrial and celestial systems is ...
... obvious necessity of two others, describing the motion of a conventionally chosen intermediary axis with respect to both systems; P This axis must be naturally chosen so that: ‚ it is close to instantaneous axis of rotation, ‚ its motion in terrestrial and celestial systems is ...
Thinking Outside the Sphere
... 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 the earth. By adjusting the size and speed of these orbits, ...
... 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 the earth. By adjusting the size and speed of these orbits, ...
Course Materials - Weber State University
... One of the simplest and yet most confusing astronomical issues is the 'reason for the seasons'. Years ago, a group of film-makers went to a graduation ceremony at Harvard University, and asked students AND FACULTY! what caused the seasons. Clearly, this would not be interesting if they all got it ri ...
... One of the simplest and yet most confusing astronomical issues is the 'reason for the seasons'. Years ago, a group of film-makers went to a graduation ceremony at Harvard University, and asked students AND FACULTY! what caused the seasons. Clearly, this would not be interesting if they all got it ri ...
Origin and loss of nebula-captured hydrogen envelopes from `sub`
... gas giant. Therefore, the common view is that giant planets must form on time-scales which are <10 Myr (Montmerle et al. 2006, and references therein). Because of this fact, one can expect that cores with masses from ‘sub’- to ‘super-Earths’ can also be formed during the time before the nebula gas e ...
... gas giant. Therefore, the common view is that giant planets must form on time-scales which are <10 Myr (Montmerle et al. 2006, and references therein). Because of this fact, one can expect that cores with masses from ‘sub’- to ‘super-Earths’ can also be formed during the time before the nebula gas e ...
Multiple scattering polarization
... source of energy and the thermal radiation from brown dwarfs arises from the release of gravitational potential energy during their formation and governed by the interaction with the atmospheric material [5]. The distinct features of the spectra of brown dwarfs, e.g., gradual disappearance of VO, Ti ...
... source of energy and the thermal radiation from brown dwarfs arises from the release of gravitational potential energy during their formation and governed by the interaction with the atmospheric material [5]. The distinct features of the spectra of brown dwarfs, e.g., gradual disappearance of VO, Ti ...
Grade 9 Space Review 50KB Nov 18 2009 10:52:00 AM
... 31. The Sun emits not only visible light but also other forms of radiation. List some of these other forms and their effect on living things on Earth. Write your answer in complete sentences. 32. What advice would you give to dedicated sunbathers? Why? Publish your advice in the school newspaper. 33 ...
... 31. The Sun emits not only visible light but also other forms of radiation. List some of these other forms and their effect on living things on Earth. Write your answer in complete sentences. 32. What advice would you give to dedicated sunbathers? Why? Publish your advice in the school newspaper. 33 ...
Near-Earth Objects - The Koschny Family
... Since several centuries we know that the Earth is orbiting about the Sun, as one out of several planets. Currently, there are eight planets known – Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Neptune was discovered 1781. Its orbit was such that scientists thought they may be a ...
... Since several centuries we know that the Earth is orbiting about the Sun, as one out of several planets. Currently, there are eight planets known – Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Neptune was discovered 1781. Its orbit was such that scientists thought they may be a ...
A S T R O N O M Y 1 1 0 - the Home Page for Voyager2.DVC.edu.
... can tell that the conversion is correct if the units (just the names like parsec or km) cancel top and bottom. Find these “same” values from a textbook or the work book. You do not need to memorize the number values. Often, you will not find a single equation relating the original units to the final ...
... can tell that the conversion is correct if the units (just the names like parsec or km) cancel top and bottom. Find these “same” values from a textbook or the work book. You do not need to memorize the number values. Often, you will not find a single equation relating the original units to the final ...
Specification Topic 1 – Earth, Moon and Sun 1.1 Planet Earth
... 1.1o describe where infrared, ultra-violet and X-ray observatories are sited and explain the reasons why 1.1p describe the nature and discovery of the Van Allen Belts ...
... 1.1o describe where infrared, ultra-violet and X-ray observatories are sited and explain the reasons why 1.1p describe the nature and discovery of the Van Allen Belts ...
3. What are the intrinsic and extrinsic environments of exoplanets?
... carefully vetted information on both the stars themselves and their immediate environments. The compilation will focus on the nearest stars, but will include all known exoplanetary systems, including new results from ground and space based observations (e.g., microlensing surveys, high precision sp ...
... carefully vetted information on both the stars themselves and their immediate environments. The compilation will focus on the nearest stars, but will include all known exoplanetary systems, including new results from ground and space based observations (e.g., microlensing surveys, high precision sp ...
course objectives - Metropolitan Community College
... Chapter 12 Predicting the Violent End of the Largest Stars 1. Describe the helium flash. 2. Describe two models to explain planetary nebulae. 3. Describe the properties of white dwarfs. 4. Describe the difference between a Type I supernova and a nova. 5. Describe the general processes taking place i ...
... Chapter 12 Predicting the Violent End of the Largest Stars 1. Describe the helium flash. 2. Describe two models to explain planetary nebulae. 3. Describe the properties of white dwarfs. 4. Describe the difference between a Type I supernova and a nova. 5. Describe the general processes taking place i ...
Unravelling the Origin and Evolution of Our Galaxy
... than our Sun. These are all within a distance of about 100 light-years. The planets detectable by this method are rather massive, comparable to Jupiter (which has about 300 times the mass of Earth). The systems have some surprising properties: two thirds of these giant planets are orbiting their hos ...
... than our Sun. These are all within a distance of about 100 light-years. The planets detectable by this method are rather massive, comparable to Jupiter (which has about 300 times the mass of Earth). The systems have some surprising properties: two thirds of these giant planets are orbiting their hos ...
Chapter 10
... 3. Describe the appearance of Jupiter’s surface and explain the belts and zones and the Great Red Spot. 4. Describe the interior of Jupiter and draw a labeled sketch of a cross section through Jupiter. 5. Be able to identify by sight, and to describe the Galilean satellites of Jupiter, including the ...
... 3. Describe the appearance of Jupiter’s surface and explain the belts and zones and the Great Red Spot. 4. Describe the interior of Jupiter and draw a labeled sketch of a cross section through Jupiter. 5. Be able to identify by sight, and to describe the Galilean satellites of Jupiter, including the ...
SPIRou Science Case
... exoplanets & exoplanetary systems, engaging the imagination not just of the astronomical community but of the general population. Since the pioneering discovery of a giant planet around 51 Peg (Mayor & Queloz 1995, Nature 378, 355), about 1,000 extra-solar planets have now been detected, revolutioni ...
... exoplanets & exoplanetary systems, engaging the imagination not just of the astronomical community but of the general population. Since the pioneering discovery of a giant planet around 51 Peg (Mayor & Queloz 1995, Nature 378, 355), about 1,000 extra-solar planets have now been detected, revolutioni ...
Magnificent Cosmos - Academic Program Pages at Evergreen
... because of a closely orbiting planet, which revolves around the star fully every 4.2 days—at a whopping speed of 482,000 kilometers (299,000 miles) an hour, more than four times faster than Earth orbits the sun. Another survey of 107 sunlike stars, performed by our team at San Francisco State Univer ...
... because of a closely orbiting planet, which revolves around the star fully every 4.2 days—at a whopping speed of 482,000 kilometers (299,000 miles) an hour, more than four times faster than Earth orbits the sun. Another survey of 107 sunlike stars, performed by our team at San Francisco State Univer ...
Observations of the asteroid 4844 Matsuyama
... Astrometrical observations, in which equatorial coordinates of the asteroids and comets are calculated with the purpose of defining their orbits. Orbit elements are: the length of the semi-major axis of the ellipse, perihelionical distance, eccentricity of the orbit, inclination of the orbit, length ...
... Astrometrical observations, in which equatorial coordinates of the asteroids and comets are calculated with the purpose of defining their orbits. Orbit elements are: the length of the semi-major axis of the ellipse, perihelionical distance, eccentricity of the orbit, inclination of the orbit, length ...
Unit 1: The Foundations of Astronomy
... 1. Science builds upon itself over time. As new evidence arises and we acquire new understandings, old theories are revised or replaced by new ones. 2. Early astronomers tracked the motion of objects in the sky and used that information to describe the universe. 3. Mathematical tools and the use of ...
... 1. Science builds upon itself over time. As new evidence arises and we acquire new understandings, old theories are revised or replaced by new ones. 2. Early astronomers tracked the motion of objects in the sky and used that information to describe the universe. 3. Mathematical tools and the use of ...
silicon and oxygen abundances in planet-host stars
... of various other metals are enhanced in these stars compared to stars with no known planets. This comes as no surprise, however, given the known positive correlation between host star iron abundance and planet detection rate. Since planet hosts are found to have higher overall iron content (which se ...
... of various other metals are enhanced in these stars compared to stars with no known planets. This comes as no surprise, however, given the known positive correlation between host star iron abundance and planet detection rate. Since planet hosts are found to have higher overall iron content (which se ...
Constraining tidal dissipation in F-type main
... tidal frequency in that frame, Ψlm the amplitude of the component of degree l and azimuthal order m, and t the time. The tidal frequency is given by ω̂lm = ln − mΩ, where n = 2π/Porb is the mean motion of the binary, Porb being its orbital period. Waves are expected to be excited with the different f ...
... tidal frequency in that frame, Ψlm the amplitude of the component of degree l and azimuthal order m, and t the time. The tidal frequency is given by ω̂lm = ln − mΩ, where n = 2π/Porb is the mean motion of the binary, Porb being its orbital period. Waves are expected to be excited with the different f ...
IAU definition of planet
The definition of planet set in Prague in 2006 by the International Astronomical Union (IAU) states that, in the Solar System, a planet is a celestial body which: is in orbit around the Sun, has sufficient mass to assume hydrostatic equilibrium (a nearly round shape), and has ""cleared the neighborhood"" around its orbit.A non-satellite body fulfilling only the first two of these criteria is classified as a ""dwarf planet"". According to the IAU, ""planets and dwarf planets are two distinct classes of objects"". A non-satellite body fulfilling only the first criterion is termed a ""small Solar System body"" (SSSB). Initial drafts planned to include dwarf planets as a subcategory of planets, but because this could potentially have led to the addition of several dozens of planets into the Solar System, this draft was eventually dropped. The definition was a controversial one and has drawn both support and criticism from different astronomers, but has remained in use.According to this definition, there are eight planets in the Solar System. The definition distinguishes planets from smaller bodies and is not useful outside the Solar System, where smaller bodies cannot be found yet. Extrasolar planets, or exoplanets, are covered separately under a complementary 2003 draft guideline for the definition of planets, which distinguishes them from dwarf stars, which are larger.