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How are the inner planets believed to have been formed?
The explosions of supernovas
Where is the inner planets located?
The inner planets have been known about since ancient times. Astronomers in Ancient Egypt, Greece and Persia all would have studied the skies and noticed the inner planets. The planets, of course, are completely different to stars, as stars are 'fixed' in the sky (as we look at them, anyway), while planets seem to meander around going nowhere in particular. The odd behaviour led astronomers to attribute this to godly doings...
Is Venus an inner planet or outer planet?
Venus is one of the "Inner" planets, along with Mercury, Earth and Mars. The "Outer" planets are Jupiter, Saturn, Uranus, Neptune and Pluto (which has recently been stripped of it's true "planet" status!) Inner planets are also known as "Terrestrial Planets" because they have a rocky surface. The difference between inner and outer planets is there location within or beyond the asteroid belt. Of course, inner planets are within the belt, while the outer ones are beyond the belt.
Why do you have terrestrial planets and gas giants?
As the Sun came into life, the lighter elements (hydrogen and helium etc) were "blasted" away from the Sun, while the heavier elements (iron and rock) stayed closer to the Sun. These heavier elements coalesced into the inner or terrestrial planets, while the lighter elements, now further from the Sun, passed, what is known as the ice line [See related link]. The reduction in temperature allowed the lighter elements to condense into solid particles and the gas giants or Jovian planets began to form. Many of the exoplanets that have been found are too close to their star to have formed in this manner but it is believed that they were formed outside of the ice line and have subsequently been drawn closer to their host star.
Who discovered inner planets?
The inner planets Mercury, Venus, and Mars have been known since ancient times, before history was written down. It wasn't until much later that Earth was found to be a planet as well, and it took a number of people to demonstrate this truth.
How are the inner planets believed to have been formed?
The explosions of supernovas
When did Mars form?
It is believed, and all suggests that the entire solar system was formed at the same time. There is no reason to believe that Mars has been formed before or afterwards the other planets.
How hot are the inner planets?
how would we know? have we been there?
Where is the inner planets located?
The inner planets have been known about since ancient times. Astronomers in Ancient Egypt, Greece and Persia all would have studied the skies and noticed the inner planets. The planets, of course, are completely different to stars, as stars are 'fixed' in the sky (as we look at them, anyway), while planets seem to meander around going nowhere in particular. The odd behaviour led astronomers to attribute this to godly doings...
Why the the sun and all the planets are believed to have been formed at the same time?
It has been believed that there was a big unknown mass of material.It collided with some other thing and broke into pieces which are the planets.The middle part remained as it was and it is called the Sun.
Is Venus an inner planet or outer planet?
Venus is one of the "Inner" planets, along with Mercury, Earth and Mars. The "Outer" planets are Jupiter, Saturn, Uranus, Neptune and Pluto (which has recently been stripped of it's true "planet" status!) Inner planets are also known as "Terrestrial Planets" because they have a rocky surface. The difference between inner and outer planets is there location within or beyond the asteroid belt. Of course, inner planets are within the belt, while the outer ones are beyond the belt.
Once the planets were formed were there any more major collisions on the terrestial planets?
Yes, as a matter of fact it is believed that Venus was hit with a massive asteroid and that's why it spins retrograde(opposite) of the other planets. Our very own Earth has been struck by hundreds of asteroids.
Are there four inner planets and four outer planets in the solar system?
Yes. Mercury, Venus, Earth, & Mars are inner planets while jupitar, saturn, uranus, and neptune are outer planets. NB For technical reasons, Pluto is not a planet nor has it been since 2006.
What evidence has been used to show that the Earth and all the planets of the solar system were formed simultaneously?
when told that let a solar system be formed it was formed
When was the sun believed to have been formed?
About 10 billion years ago.
How was your planet thought to have been formed?
Earth, like all planets, was formed by clumps of matter joining together due to gravity.
Why do you have terrestrial planets and gas giants?
As the Sun came into life, the lighter elements (hydrogen and helium etc) were "blasted" away from the Sun, while the heavier elements (iron and rock) stayed closer to the Sun. These heavier elements coalesced into the inner or terrestrial planets, while the lighter elements, now further from the Sun, passed, what is known as the ice line [See related link]. The reduction in temperature allowed the lighter elements to condense into solid particles and the gas giants or Jovian planets began to form. Many of the exoplanets that have been found are too close to their star to have formed in this manner but it is believed that they were formed outside of the ice line and have subsequently been drawn closer to their host star.
