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What is called the lazy planet?
Uranus, because unlike the other planets whose equators are more or less oriented towards the Sun, it orbits the Sun on its side.
Who discovered that planets have elliptical orbits not circular orbits?
It was known by the ancient Greeks that the orbits were not perfectly circular, but it was Johannes Kepler with his 'Laws of Planetary Motion' published in 1618 that finally described them correctly as ellipses. Later these provided Newton with the information needed to formulate his law of gravity as an inverse-square law, but to do that Newton had to invent what we call calculus. For over 1000 years astronomers described the orbits by using circular orbits and epicycles. An epicycle was a small circle whose centre travelled round a large circle while the planet lay on the epicycle. As the centre of the epicycle went round a full circle, the planet also travelled once round the epicycle. This explained very well (almost correctly) the planetary orbits, with each planet going closer to and further from the Sun once during each rotation. The difference between an ellipse and an orbit that uses an epicycle is extremely small when the ellipse's eccentricity is low, as it is for most of the planets, hence the long-lasting difficulty with this problem.
What is the difference between inner and outer planets?
The four inner planets are smaller, denser and warmer than the four outer gas planets. The four gas planets don't have clear surfaces like the four inner rocky planets. Because they are further away, the out gas planets orbit the sun at slower speeds and at slower rates - taking much longer in general. The four outer planets have a very different composition to the inner planets.The inner planets and the outer plants are divided by the asteroid belt.The inner planets are small and comprised mainly of rock and metals.The outer planets are large and are comprised mainly of gases and ices.However, it was believed that other planets close to another star couldn't be gas giants, but the discovery of a "hot Jupiter" extrasolar planet whose mass is close to or exceeds that of Jupiter orbits within 0.05 AU of it's parent stars, about one eighth of the distance that Mercury orbits the Sun.the inner planets are rocky and within the aesteroid belt. the outer planets are made from gas and ice and are outside the belt.The inner planets are between the Sun and the Asteroid Belt, while the outer planets are farther from the Sun than the Belt.The "inner planets" are the four rocky or "terrestrial" (Earth-like) planets closer to the Sun. The outer planets are the four larger "gas giants".Inner planets : Mercury, Venus, Earth, MarsOuter planets : Jupiter, Saturn, Uranus, Neptune
What is the Name for planets whose atmosphere is made up of mostly gases?
atmosphere is made up of gases in all planets. But if you mean planets that are mostly atmosphere, then those are gas giants (Jupiter, Saturn, Neptune, Uranus)
Which object orbits earth in both the earth centered and sun centered models?
That would be the moon. We've never thought of it that way ... the only object whose status didn't change between the geocentric and heliocentric model. Thanks for showing it to us.
Does any planet cross the earth's orbit?
There are no planets that cross the earth's orbit. Pluto (dwarf, or minor planet) and Neptune are the only planets whose orbits cross. However there are over 100 asteroids (minor planets) that cross the earth's orbit.
What are the names of the asteroids that cross Earth's orbit and Jupiter's orbit?
Main Belt asteroids -- a band of asteroids located in the "missing planet" gap between Mars and Jupiter. None of these are economically attractive in a near term program because they are too far from Earth.Amor asteroids -- asteroids whose orbits approach but do not cross Earth orbit, and whose orbits are further from the Sun than Earth's orbit (i.e., "outside-t" Earth orbit). Many have orbits which reside entirely between Earth and Mars. Some of these are economically attractive in the near term.Apollo asteroids -- asteroids whose orbits cross Earth's orbit. Apollo asteroids spend most of their time outside Earth orbit. Many of these are economically attractive in the near term.Aten asteroids -- asteroids whose orbits cross Earth's orbit. Unlike Apollos, Atens spend most of their time inside Earth orbit. A large percentage of known Atens are economically attractive in the near term.
What are the planets between the earth and the moon?
There are no "planets" between the Earth and its Moon (the closest astronomical body to our planet). Earth has no natural satellites other than the Moon, although some Sun-orbiting asteroids (notably 3753 Cruithne) have orbits that intersect the Earth's orbit and have moon-like resonances with Earth and other inner planets.There are two planets whose orbits are between the Earth and the Sun : Mercury and Venus.
Why are some asteroid called neo's?
In dicussing asteroids, NEO stands for Near-Earth Object. NEOs are asteroids whose orbits come close to or cross Earth's. This creates a potential hazard for a collision.
Is Venus's a rocky or a gas planet?
The four planets whose orbits are nearest the sun are all rocky planets. They include Mercury, Venus, Earth and Mars.
Whose laws of motion keeps planets in their orbit?
Gravity keeps planets in their orbits.Newton's laws of motion and universal gravitation explain how orbits work, but have no influence whatsoeveron causing it to work that way.
What is called the lazy planet?
Uranus, because unlike the other planets whose equators are more or less oriented towards the Sun, it orbits the Sun on its side.
What are nearly round bodies whose orbits cross other planet's orbits?
Dwarf Planets are bodies that both orbit the sun directly and which are large enough to be approximately spherical in shape. They are not the dominant objects in their orbit though, crossing other orbits of other large bodies. If they were to be found not to do this, being the dominant body at that orbit, then they would be classed as a planet.
Is a dwarf planet a moon?
No, a dwarf planet is not a moon. A moon is a body which orbits a large body. However, dwarf planets don't orbit any larger bodies and just orbit the sun in their solar system. Most dwarf planets are failed planets that were forming, but were to close to a gas giant whose gravity messed up the formation of the planet.
Which planet is closest to eath?
Which planet is closest to Earth varies depending on where the planets are in their orbits. At different times the closest planet may be Mercury, Venus, or Mars. The planet whose orbit comes closest to Earth's is Venus.
Who discovered that planets have elliptical orbits not circular orbits?
It was known by the ancient Greeks that the orbits were not perfectly circular, but it was Johannes Kepler with his 'Laws of Planetary Motion' published in 1618 that finally described them correctly as ellipses. Later these provided Newton with the information needed to formulate his law of gravity as an inverse-square law, but to do that Newton had to invent what we call calculus. For over 1000 years astronomers described the orbits by using circular orbits and epicycles. An epicycle was a small circle whose centre travelled round a large circle while the planet lay on the epicycle. As the centre of the epicycle went round a full circle, the planet also travelled once round the epicycle. This explained very well (almost correctly) the planetary orbits, with each planet going closer to and further from the Sun once during each rotation. The difference between an ellipse and an orbit that uses an epicycle is extremely small when the ellipse's eccentricity is low, as it is for most of the planets, hence the long-lasting difficulty with this problem.
Who discovered that planets have elliptical orbits not circular orbits.?
It was known by the ancient Greeks that the orbits were not perfectly circular, but it was Johannes Kepler with his 'Laws of Planetary Motion' published in 1618 that finally described them correctly as ellipses. Later these provided Newton with the information needed to formulate his law of gravity as an inverse-square law, but to do that Newton had to invent what we call calculus. For over 1000 years astronomers described the orbits by using circular orbits and epicycles. An epicycle was a small circle whose centre travelled round a large circle while the planet lay on the epicycle. As the centre of the epicycle went round a full circle, the planet also travelled once round the epicycle. This explained very well (almost correctly) the planetary orbits, with each planet going closer to and further from the Sun once during each rotation. The difference between an ellipse and an orbit that uses an epicycle is extremely small when the ellipse's eccentricity is low, as it is for most of the planets, hence the long-lasting difficulty with this problem.
