What is the basic assumption of jeans Jeffreys tidal theory?
Space and AstronomyThe second theory, the tidal theory, was first proposed by Jeans (1916). This postulated that the passage of a massive star past the Sun would raise a huge solar tidal bulge from which matter would escape in the form of a filament.
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What is the tidal hypothesis of James Jeans?
ADVERTISEMENTS: James Jeans postulated that due to massive gravitational force of the ‘intruding star’, huge amount of matter was ejected from the primitive sun, which later on became the building material of future planets.
Who proposed gaseous tidal hypothesis?
Sir James Jeans
Sir James Jeans, a British scientist, proposed his ‘tidal hypothesis’ to explain the origin of the earth in 1919, while Harold Jeffreys, another British scientist, suggested modifications to the ‘tidal hypothesis’ in 1929. Hence statement 2 is incorrect.
What is the meaning of tidal theory?
Definition of tidal theory
1 : a theory of the evolution of a celestial body that is based on the action of tidal forces specifically : such a theory explaining the moon’s evolution. 2 : the theory of the present ocean tides.
What are the two theories of solar system?
Two of them, the Solar Nebula Theory and the Capture Theory, will be described in more detail, emphasizing what they have and have not explained and what their remaining difficulties are.
What is the solar nebula theory?
solar nebula, gaseous cloud from which, in the so-called nebular hypothesis of the origin of the solar system, the Sun and planets formed by condensation. Swedish philosopher Emanuel Swedenborg in 1734 proposed that the planets formed out of a nebular crust that had surrounded the Sun and then broken apart.
What is nebula theory?
Currently the best theory is the Nebular Theory . This states that the solar system developed out of an interstellar cloud of dust and gas, called a nebula . This theory best accounts for the objects we currently find in the Solar System and the distribution of these objects.
What are the first 4 planets called?
terrestrial planets
The planets Mercury, Venus, Earth, and Mars, are called terrestrial because they have a compact, rocky surface like Earth’s terra firma. The terrestrial planets are the four innermost planets in the solar system.
How do the atmospheres of the terrestrial and the Jovian planets differ?
When considering the size, the jovian planets are much larger than the terrestrial planets. While the atmosphere of terrestrial planets is composed mainly of carbon dioxide and nitrogen gases, hydrogen and helium gases are found in abundance in the atmosphere of jovian planets.
What is Jupiter’s main ingredient?
Jupiter is made up predominantly of hydrogen. The simple, basic gas, a prime ingredient on the sun, accounts for 90 percent of the atmosphere. Nearly 10 percent is composed of helium. A very small fraction of the atmosphere is made up of compounds such as ammonia, sulfur, methane, and water vapor.
Is Saturn the only planet with a ring?
Like fellow gas giant Jupiter, Saturn is a massive ball made mostly of hydrogen and helium. Saturn is not the only planet to have rings, but none are as spectacular or as complex as Saturn’s. Saturn also has dozens of moons.
What causes the belts and zones in Jupiter’s atmosphere?
What causes the belts and zones in Jupiter’s atmosphere? The belts and zones result from convection in Jupiter’s atmosphere combined with it’s fast rotation.
What planet is Uranus?
Uranus is the seventh planet from the Sun, and has the third-largest diameter in our solar system. It was the first planet found with the aid of a telescope, Uranus was discovered in 1781 by astronomer William Herschel, although he originally thought it was either a comet or a star.
What planet is green?
Uranus
Uranus is blue-green in color, as a result of the methane in its mostly hydrogen-helium atmosphere. The planet is often dubbed an ice giant, since at least 80% of its mass is a fluid mix of water, methane and ammonia ice.
How is Uranus blue?
Uranus gets its blue-green color from methane gas in the atmosphere. Sunlight passes through the atmosphere and is reflected back out by Uranus’ cloud tops. Methane gas absorbs the red portion of the light, resulting in a blue-green color.
Do all planets rotate?
The planets all revolve around the sun in the same direction and in virtually the same plane. In addition, they all rotate in the same general direction, with the exceptions of Venus and Uranus. These differences are believed to stem from collisions that occurred late in the planets’ formation.
Does Sun rotate?
The Sun rotates on its axis once in about 27 days. This rotation was first detected by observing the motion of sunspots. The Sun’s rotation axis is tilted by about 7.25 degrees from the axis of the Earth’s orbit so we see more of the Sun’s north pole in September of each year and more of its south pole in March.
Does our moon rotate?
It made so much sense now! The moon does rotate on its axis. One rotation takes nearly as much time as one revolution around Earth. If the moon were to rotate quickly (several times each month) or not rotate at all, Earth would be exposed to all sides of the moon (i.e. multiple different views).
Does a solar nebula spin?
The slowly rotating solar nebula collapsed under its own gravity to form a rapidly rotating disk, with the Sun at the center. Collisions of gas and dust within the disk concentrated the material into a thin plane.
Why do nebulas spin faster?
Why does a nebula spin faster as it contracts? A nebula spins faster as it contracts because of the conservation of angular momentum.
Can moons have atmospheres active volcanoes or liquid water?
Moons cannot have atmospheres, active volcanoes, or liquid water. No, Jupiter, Uranus, and Neptune also have rings along with Saturn. We could probably learn more about Mars by sending a new spacecraft on a flyby than by any other method of studying the planet.
Is Jupiter solid in the middle?
Because there is no solid ground, the surface of Jupiter is defined as the point where the atmospheric pressure is equal to that of Earth. At this point, the pull of gravity is almost two and a half times stronger than it is on our planet.
Is Saturn hot?
Saturn’s interior is hot! At the core, the temperature is at least 15,000 degrees Fahrenheit. That’s hotter than the surface of the Sun!
Is Uranus solid or gas?
The surface of Uranus
Like the other gas giants, Uranus lacks a solid, well-defined surface. Instead, the gas, liquid, and icy atmosphere extends to the planet’s interior.
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