Is anything out there revised
... Using their knowledge of life on Earth and the characteristics of the other planets in our Solar System, astrobiologists rule out life as we know it on most new planets. One of the key requirements is liquid water. They look for planets that fall inside a habitable zone around a star – a planet must ...
... Using their knowledge of life on Earth and the characteristics of the other planets in our Solar System, astrobiologists rule out life as we know it on most new planets. One of the key requirements is liquid water. They look for planets that fall inside a habitable zone around a star – a planet must ...
Jupiter: friend or foe An answer
... from excessive bombardment dates back to when the main impact risk to the Earth was thought to arise from the Oort cloud comets. The idea probably originated in the 1960s, when craters were first widely accepted as evidence of ongoing impacts upon the Earth and far more long-period comets were known ...
... from excessive bombardment dates back to when the main impact risk to the Earth was thought to arise from the Oort cloud comets. The idea probably originated in the 1960s, when craters were first widely accepted as evidence of ongoing impacts upon the Earth and far more long-period comets were known ...
Slide 1
... In words, this means that as a becomes larger (the orbit is larger), then P becomes larger too. You would expect this. A planet in a larger orbit has further to go, so it should take longer, even if it goes at the same ...
... In words, this means that as a becomes larger (the orbit is larger), then P becomes larger too. You would expect this. A planet in a larger orbit has further to go, so it should take longer, even if it goes at the same ...
Jovian Planet Systems (Chapter 11)
... outwards each time it comes close to Europa This always happens when Io is furthest from Jupiter (“Aphelion” …) Keeps Io’s orbit elliptical ...
... outwards each time it comes close to Europa This always happens when Io is furthest from Jupiter (“Aphelion” …) Keeps Io’s orbit elliptical ...
Space Rocks Game
... spot in the Australian desert your dark coloring makes you very visible on the white ice. where you are ready to be CONGRATULATIONS! You will found, just as soon as be found and carefully studied someone comes by. . . to gain clues to the age and origin of our solar system! GOOD LUCK NEXT TIME ! ...
... spot in the Australian desert your dark coloring makes you very visible on the white ice. where you are ready to be CONGRATULATIONS! You will found, just as soon as be found and carefully studied someone comes by. . . to gain clues to the age and origin of our solar system! GOOD LUCK NEXT TIME ! ...
Here - TPS Publishing
... the orbit and – sure enough – they found Neptune! Neptune is another giant gas planet. Scientists think it has a liquid core that is as large as Earth. Neptune is tilted on its axis more than Earth is. In fact, its seasons last about 41 years, instead of the 3 months that ours last. So much of what ...
... the orbit and – sure enough – they found Neptune! Neptune is another giant gas planet. Scientists think it has a liquid core that is as large as Earth. Neptune is tilted on its axis more than Earth is. In fact, its seasons last about 41 years, instead of the 3 months that ours last. So much of what ...
Dwarf planets
... After Eris and Pluto, Makemake is the third largest known dwarf planet. Along with fellow dwarf planets Pluto and Haumea, Makemake is located in the Kuiper Belt. Pluto and Makemake are the two brightest objects that have so far been discovered in the Kuiper Belt. It takes 310 Earth years for thi ...
... After Eris and Pluto, Makemake is the third largest known dwarf planet. Along with fellow dwarf planets Pluto and Haumea, Makemake is located in the Kuiper Belt. Pluto and Makemake are the two brightest objects that have so far been discovered in the Kuiper Belt. It takes 310 Earth years for thi ...
The Dynamic Earth - University of Toronto Physics
... and how rapidly the glacial ice caps ex panded and then shrank as the earth re turned to the comparatively unglaciated stage that prevails today. Polar ice and ...
... and how rapidly the glacial ice caps ex panded and then shrank as the earth re turned to the comparatively unglaciated stage that prevails today. Polar ice and ...
What is the solar system?
... we form a model of how the solar system formed that explains the motions and mass distributions of planets, small bodies, and dust? • What are some questions we could ask? – Was the starting material uniform in composition and why is it not now evenly distributed? – What are the energy sources in ...
... we form a model of how the solar system formed that explains the motions and mass distributions of planets, small bodies, and dust? • What are some questions we could ask? – Was the starting material uniform in composition and why is it not now evenly distributed? – What are the energy sources in ...
Riding Big Waves
... climate and cloud formation (a hotly debated topic) • The strength of solar wind and WIM density strongly influence the cosmic ray flux and hence likely also climate and life on Earth. H. Falcke ...
... climate and cloud formation (a hotly debated topic) • The strength of solar wind and WIM density strongly influence the cosmic ray flux and hence likely also climate and life on Earth. H. Falcke ...
Solar System: ground-based
... planet formation timescale - Time scale for dust settling and grain growth? - Planet formation mechanism: core accretion vs. disk instability - Physical structure disks (T, n, v, ….)? ...
... planet formation timescale - Time scale for dust settling and grain growth? - Planet formation mechanism: core accretion vs. disk instability - Physical structure disks (T, n, v, ….)? ...
Practice test - astronomy
... how the planets of the solar system formed? A. They are condensed rings of matter thrown off by the young Sun. B. They are the remains of an exploded star once paired with the Sun. C. The Sun captured them from smaller, older nearby stars. D. They formed from a nebular cloud of dust and gas. ...
... how the planets of the solar system formed? A. They are condensed rings of matter thrown off by the young Sun. B. They are the remains of an exploded star once paired with the Sun. C. The Sun captured them from smaller, older nearby stars. D. They formed from a nebular cloud of dust and gas. ...
here
... 34) Which of the following statements correctly describes the law of conservation of energy? A) The fact that you can fuse hydrogen into helium to produce energy means that helium can be turned into hydrogen to produce energy. B) An object always has the same amount of energy. C) Energy can change ...
... 34) Which of the following statements correctly describes the law of conservation of energy? A) The fact that you can fuse hydrogen into helium to produce energy means that helium can be turned into hydrogen to produce energy. B) An object always has the same amount of energy. C) Energy can change ...
Earth at Aphelion - Stargazers Lounge
... orbit around the Moon, and so on. You’ll hear the words apijove and perijove bandied about this week a bit, as NASA’s Juno spacecraft enters orbit around Jupiter tonight. And there are crazier and even more obscure counterparts out there, such as peribothron and apobothron (orbiting a black hole) an ...
... orbit around the Moon, and so on. You’ll hear the words apijove and perijove bandied about this week a bit, as NASA’s Juno spacecraft enters orbit around Jupiter tonight. And there are crazier and even more obscure counterparts out there, such as peribothron and apobothron (orbiting a black hole) an ...
ph507lecnote07
... 2. Gravitational torques from planet try to open gap wider. 3. Gap edge set by a balance: -> Internal viscous torque = planetary torque 4. Planet acts as an angular momentum ‘bridge’: • Inside gap, outward angular momentum flux transported by viscosity within disc • At gap edge, flux transferred to ...
... 2. Gravitational torques from planet try to open gap wider. 3. Gap edge set by a balance: -> Internal viscous torque = planetary torque 4. Planet acts as an angular momentum ‘bridge’: • Inside gap, outward angular momentum flux transported by viscosity within disc • At gap edge, flux transferred to ...
Rockets and Space Travel
... To carry larger payloads it is common to stack several rockets to form a multi stage rocket. Each stage is successively jettisoned as they run out of the propellant. – Thus reducing the mass and allowing the thrust of the remaining stages to be used more effectively to accelerate the rocket to its f ...
... To carry larger payloads it is common to stack several rockets to form a multi stage rocket. Each stage is successively jettisoned as they run out of the propellant. – Thus reducing the mass and allowing the thrust of the remaining stages to be used more effectively to accelerate the rocket to its f ...
Chapter 1 – Plate Tectonics
... ~ When magma (molten rock containing minerals and gases) cools to form a solid rock, minerals like magnetite will line up with Earth’s magnetic field. The magnetite minerals in some of the bands were lined up with the current position of Earth’s magnetic north and south poles. These rocks had norm ...
... ~ When magma (molten rock containing minerals and gases) cools to form a solid rock, minerals like magnetite will line up with Earth’s magnetic field. The magnetite minerals in some of the bands were lined up with the current position of Earth’s magnetic north and south poles. These rocks had norm ...
document
... • Can deduce the true “sidereal” (as opposed to readily measured “synodic”) orbital periods of each of the planets [see textbook BOX 4-1 and Table 4-1] • Can deduce the distance that each planet is from the Sun, relative to the Earth’s distance from the Sun (1 AU); [see textbook discussion associate ...
... • Can deduce the true “sidereal” (as opposed to readily measured “synodic”) orbital periods of each of the planets [see textbook BOX 4-1 and Table 4-1] • Can deduce the distance that each planet is from the Sun, relative to the Earth’s distance from the Sun (1 AU); [see textbook discussion associate ...
The formation of stars and planets
... Typically this is reached at 10-6..10-5 M. From here on: gravitational influence of protoplanet determines random velocities, not the self-stirring of the planetesimals. ‘Oligarchic growth’. ...
... Typically this is reached at 10-6..10-5 M. From here on: gravitational influence of protoplanet determines random velocities, not the self-stirring of the planetesimals. ‘Oligarchic growth’. ...
Saturn – “The Lord of the Rings”
... Pluto is no longer a planet Differs very much from the others • Mostly composed of rock with a water-ice mantle • Its atmosphere contains methane ice (and perhaps N2, CO, CO2) • Other outer planets mainly composed of gas • Higher density than the other planets • Biggest moon (Charon) very large in c ...
... Pluto is no longer a planet Differs very much from the others • Mostly composed of rock with a water-ice mantle • Its atmosphere contains methane ice (and perhaps N2, CO, CO2) • Other outer planets mainly composed of gas • Higher density than the other planets • Biggest moon (Charon) very large in c ...
Chapter 15 The Formation of Planetary Systems
... •! The solar system is orderly, not random; yet strong evidence for catastrophic collisions. Need formation theory that explains this. •! Condensation theory is the current favorite—large cloud of interstellar gas and dust starts to collapse, the Sun forms at the center, residual gas and dust remain ...
... •! The solar system is orderly, not random; yet strong evidence for catastrophic collisions. Need formation theory that explains this. •! Condensation theory is the current favorite—large cloud of interstellar gas and dust starts to collapse, the Sun forms at the center, residual gas and dust remain ...
Late Heavy Bombardment
The Late Heavy Bombardment (abbreviated LHB and also known as the lunar cataclysm) is a hypothetical event thought to have occurred approximately 4.1 to 3.8 billion years (Ga) ago, corresponding to the Neohadean and Eoarchean eras on Earth. During this interval, a disproportionately large number of asteroids apparently collided with the early terrestrial planets in the inner Solar System, including Mercury, Venus, Earth, and Mars. The LHB happened after the Earth and other rocky planets had formed and accreted most of their mass, but still quite early in Earth's history.Evidence for the LHB derives from lunar samples brought back by the Apollo astronauts. Isotopic dating of Moon rocks implies that most impact melts occurred in a rather narrow interval of time. Several hypotheses are now offered to explain the apparent spike in the flux of impactors (i.e. asteroids and comets) in the inner Solar System, but no consensus yet exists. The Nice model is popular among planetary scientists; it postulates that the gas giant planets underwent orbital migration and scattered objects in the asteroid and/or Kuiper belts into eccentric orbits, and thereby into the path of the terrestrial planets. Other researchers argue that the lunar sample data do not require a cataclysmic cratering event near 3.9 Ga, and that the apparent clustering of impact melt ages near this time is an artifact of sampling materials retrieved from a single large impact basin. They also note that the rate of impact cratering could be significantly different between the outer and inner zones of the Solar System.