In our solar system, do all planets revolve around the sun in the same plane. Why/Why not ?
Do the planetary moons also revolve around the planet in a similar way ? Justify your answer.
Answers
Question 1
Answer : Because of the way the Sun formed, explains David DeVorkin, a senior curator in the space history division at the Air and Space Museum. ... The faster rotation flattened the cloud into a pancake, with the Sun at the center and planets forming within that plane.
Question 2
Answer: 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.
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Answer :1
Here’s the yes part of the answer, beginning with another astronomy definition; the Earth-sun plane is called the ecliptic. Most major planets in our solar system stay within 3 degrees of the ecliptic. Mercury is the exception; its orbit is inclined to the ecliptic by 7 degrees. The dwarf planet Pluto is a widely known exception to this rule. Its orbit is inclined to the ecliptic by more than 17 degrees.
It makes sense that most large planets in our solar system stay near the ecliptic plane. Our solar system is believed to be about 4 1/2 billion years old. It’s thought to have arisen from an amorphous cloud of gas and dust in space. The original cloud was spinning, and this spin caused it to flatten out into a disk shape. The sun and planets are believed to have formed out of this disk, which is why, today, the planets still orbit in a single plane around our sun.
According to astronomers, distant stars and planets also form from spinning clouds of gas and dust in space. In recent years, astronomers have captured images of some protoplanetary disks – new solar systems in the process of formation – plus they see distant, already-formed solar systems, whose planets do orbit, as ours does, more or less in a single plane.
On these worlds, yes, you would see planets crossing the sky along a pathway similar to our zodiac, the same pathway traveled by the local star.
On the other hand, it seems, astronomers recently learned that not all planet-forming disks lie in the plane of their stars’ equators, as our solar system’s must have. In early 2019, astronomers announced a newly discovered double star system where the planetary disk has somehow been kicked up over the expected equatorial plane, and now appears oriented over the plane of the stars’ poles.
Answer :2
Moons – also known as natural satellites – orbit planets and asteroids in our solar system. ... Pluto and some other dwarf planets, as well as many asteroids, also have small moons. Saturn and Jupiter have the most moons, with dozens orbiting each of the two giant planets. Moons come in many shapes, sizes, and types.
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