PLANETS
... brown dwarf type masses, not massive planets. Smaller gaps definitely tend to circularize the orbit instead. • Seems unlikely to give very large eccentricities (B) Protoplanetary disc itself is eccentric Assumption: why should discs have circular orbits anyway? Eccentric disc -> eccentric planet? No ...
... brown dwarf type masses, not massive planets. Smaller gaps definitely tend to circularize the orbit instead. • Seems unlikely to give very large eccentricities (B) Protoplanetary disc itself is eccentric Assumption: why should discs have circular orbits anyway? Eccentric disc -> eccentric planet? No ...
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... © 2014 by McGraw-Hill Education. This is proprietary material solely for authorized instructor use. Not authorized for sale or distribution in any manner. This document may not be copied, scanned, duplicated, forwarded, distributed, or posted on a website, in whole or part ...
... © 2014 by McGraw-Hill Education. This is proprietary material solely for authorized instructor use. Not authorized for sale or distribution in any manner. This document may not be copied, scanned, duplicated, forwarded, distributed, or posted on a website, in whole or part ...
Earth - Harding University
... Secondly, the sun is not an average star, it ranks in the top 10% of all stars in size. The average star is a small, very cool M class star. The sun also has a high metal content. Stars with low metal content will not have rocky planets. The sun is also unusually stable for a main sequence ...
... Secondly, the sun is not an average star, it ranks in the top 10% of all stars in size. The average star is a small, very cool M class star. The sun also has a high metal content. Stars with low metal content will not have rocky planets. The sun is also unusually stable for a main sequence ...
Planets - Cardinal Hayes High School
... How do we describe the Inner Planets? Inner Planets separated intoare two planets • Small size The Planets are Inner groups, the Inner and Outercalled planets. Mercury, Terrestrial • Rocky composition (mostly Venus, Planetsplanets solid) Earth, and Mars, are the closest to the sun. These four plane ...
... How do we describe the Inner Planets? Inner Planets separated intoare two planets • Small size The Planets are Inner groups, the Inner and Outercalled planets. Mercury, Terrestrial • Rocky composition (mostly Venus, Planetsplanets solid) Earth, and Mars, are the closest to the sun. These four plane ...
Question 1
... supported the ideas of Copernicus. • He observed that Venus went through phases like the Moon’s. • He also saw moons in orbit around Jupiter. ...
... supported the ideas of Copernicus. • He observed that Venus went through phases like the Moon’s. • He also saw moons in orbit around Jupiter. ...
Document
... Radial Velocity Measurements of CoRoT-7b with HARPS. CoRoT-7b is a transiting planet discovered by CoRoT. The additional planets were found from the radial velocity follow up. ...
... Radial Velocity Measurements of CoRoT-7b with HARPS. CoRoT-7b is a transiting planet discovered by CoRoT. The additional planets were found from the radial velocity follow up. ...
New Worlds - Universiteit Leiden
... which is half the mass of Jupiter, turned out not to be at a respectable distance from the star, but instead orbits very close to the star. Jupiter takes some twelve years to orbit our Sun; this exoplanet circles 51 Pegasi in just four days! Theoreticians had for decades come up with wonderful expla ...
... which is half the mass of Jupiter, turned out not to be at a respectable distance from the star, but instead orbits very close to the star. Jupiter takes some twelve years to orbit our Sun; this exoplanet circles 51 Pegasi in just four days! Theoreticians had for decades come up with wonderful expla ...
ph507lecnote06
... • Solar System prototypes: Jupiter, Saturn, Uranus... • Substantial gaseous envelopes • Masses of the order of Jupiter mass • In the Solar System, NOT same composition as Sun • Presence of gas implies formation while gas was still prevelant ...
... • Solar System prototypes: Jupiter, Saturn, Uranus... • Substantial gaseous envelopes • Masses of the order of Jupiter mass • In the Solar System, NOT same composition as Sun • Presence of gas implies formation while gas was still prevelant ...
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... present. These locations are in resonance with Jupiter . The role of Jupiter has been to eject the bodies in resonance with the planet. The 3:2 resonance with Neptune plays the inverse role. At the location of this resonance, numerous bodies piled up, including Pluto. This resonance is stable. The r ...
... present. These locations are in resonance with Jupiter . The role of Jupiter has been to eject the bodies in resonance with the planet. The 3:2 resonance with Neptune plays the inverse role. At the location of this resonance, numerous bodies piled up, including Pluto. This resonance is stable. The r ...
Circumstellar habitable zone
In astronomy and astrobiology, the circumstellar habitable zone (CHZ), or simply the habitable zone, is the region around a star within which planetary-mass objects with sufficient atmospheric pressure can support liquid water at their surfaces. The bounds of the CHZ are calculated using the known requirements of Earth's biosphere, its position in the Solar System and the amount of radiant energy it receives from the Sun. Due to the importance of liquid water to life as it exists on Earth, the nature of the CHZ and the objects within is believed to be instrumental in determining the scope and distribution of Earth-like extraterrestrial life and intelligence.The habitable zone is also called the Goldilocks zone, a metaphor of the children's fairy tale of Goldilocks and the Three Bears, in which a little girl chooses from sets of three items, ignoring the ones that are too extreme (large or small, hot or cold, etc.), and settling on the one in the middle, which is ""just right"".Since the concept was first presented in 1953, stars have been confirmed to possess a CHZ planet, including some systems that consist of multiple CHZ planets. Most such planets, being super-Earths or gas giants, are more massive than Earth, because such planets are easier to detect. On November 4, 2013, astronomers reported, based on Kepler 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 in the Milky Way. 11 billion of these may be orbiting Sun-like stars. The nearest such planet may be 12 light-years away, according to the scientists. The CHZ is also of particular interest to the emerging field of habitability of natural satellites, because planetary-mass moons in the CHZ might outnumber planets.In subsequent decades, the CHZ concept began to be challenged as a primary criterion for life. Since the discovery of evidence for extraterrestrial liquid water, substantial quantities of it are now believed to occur outside the circumstellar habitable zone. Sustained by other energy sources, such as tidal heating or radioactive decay or pressurized by other non-atmospheric means, the basic conditions for water-dependent life may be found even in interstellar space, on rogue planets, or their moons. In addition, other circumstellar zones, where non-water solvents favorable to hypothetical life based on alternative biochemistries could exist in liquid form at the surface, have been proposed.