PPT - El Camino College
... – Collisions can destroy small planetesimals. – What’s left at the end? – What’s the temperature like near the Sun? • Gases won’t stay on the planets ...
... – Collisions can destroy small planetesimals. – What’s left at the end? – What’s the temperature like near the Sun? • Gases won’t stay on the planets ...
Document
... • The mission will yield a variety of data to calibrate dynamo models, sampling many different sets of physical conditions and evolutionary phases. ...
... • The mission will yield a variety of data to calibrate dynamo models, sampling many different sets of physical conditions and evolutionary phases. ...
Phys 214. Planets and Life
... The solar nebula heats up <- law of energy conservation. Large gravitational potential energy -> kinetic energy & heat as they fall inward and collide. The cloud becomes hotter near the center, where the star forms. Spin faster <- conservation of angular momentum. The total amount of circling motion ...
... The solar nebula heats up <- law of energy conservation. Large gravitational potential energy -> kinetic energy & heat as they fall inward and collide. The cloud becomes hotter near the center, where the star forms. Spin faster <- conservation of angular momentum. The total amount of circling motion ...
Tidal Mechanism as an Impossible Cause of the Observed Secular
... apsidal motion constant, denoted as k in Schwarzschild (1965) or k2 in Torres et al. (2009).] Table 1 gives the values of aP p for the 5 inner-most planets. For all of those planets, aP p is well below the reported value of the increase in AU. Note that the value of aP p for Earth is about 100-times ...
... apsidal motion constant, denoted as k in Schwarzschild (1965) or k2 in Torres et al. (2009).] Table 1 gives the values of aP p for the 5 inner-most planets. For all of those planets, aP p is well below the reported value of the increase in AU. Note that the value of aP p for Earth is about 100-times ...
DTU 8e Chap 5 Formation of the Solar System
... (a) A planet and its star both orbit around their common center of mass, always staying on opposite sides of that point. The star’s motion around the center of mass provides astronomers with the information that a planet is present. (b) As a planet moves toward or away from us, its star moves in the ...
... (a) A planet and its star both orbit around their common center of mass, always staying on opposite sides of that point. The star’s motion around the center of mass provides astronomers with the information that a planet is present. (b) As a planet moves toward or away from us, its star moves in the ...
Objects In Space -- research questions
... 5. Can we see them from Earth? If so, what do they look like? ...
... 5. Can we see them from Earth? If so, what do they look like? ...
File
... inner planets, the only one known to have current geological activity, and the only place where life is known to exist. Its liquid hydrosphere is unique among the terrestrial planets, and it is also the only planet where plate tectonics has been observed. Earth's atmosphere is radically different fr ...
... inner planets, the only one known to have current geological activity, and the only place where life is known to exist. Its liquid hydrosphere is unique among the terrestrial planets, and it is also the only planet where plate tectonics has been observed. Earth's atmosphere is radically different fr ...
What is a planet?
... • 3 of 4 terrestrial planets and 3 of 4 giant planets have obliquities (angle between spin and orbital angular momentum) < 30o; but Uranus is tipped at 98o • interplanetary space is virtually empty, except for the asteroid belt and the Kuiper belt • planets account for < 0.2% of mass of solar sys ...
... • 3 of 4 terrestrial planets and 3 of 4 giant planets have obliquities (angle between spin and orbital angular momentum) < 30o; but Uranus is tipped at 98o • interplanetary space is virtually empty, except for the asteroid belt and the Kuiper belt • planets account for < 0.2% of mass of solar sys ...
What is a pulsar planet ? How do planets form ?
... • A massive star having planets explodes and becomes a pulsar with planets. • Explosion energy is injected from supernovae to planets. If the star has a jupiter-like planet, about 1046 erg is injected to the planet. This energy is enough to strip the atmosphere from the planet. Therefore only a core ...
... • A massive star having planets explodes and becomes a pulsar with planets. • Explosion energy is injected from supernovae to planets. If the star has a jupiter-like planet, about 1046 erg is injected to the planet. This energy is enough to strip the atmosphere from the planet. Therefore only a core ...
Your Birthday on Another Planet
... the Sun. If we could live on another planet, our birthdays would occur more or less frequently depending on the planet’s revolution period (the time taken to complete one full trip around the Sun). On a few planets, we couldn’t even celebrate our first birthday because we wouldn’t live long enough t ...
... the Sun. If we could live on another planet, our birthdays would occur more or less frequently depending on the planet’s revolution period (the time taken to complete one full trip around the Sun). On a few planets, we couldn’t even celebrate our first birthday because we wouldn’t live long enough t ...
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.