In fact, there are no two planets that orbit in exactly the same plane. The planets orbit close to the ecliptic, but not exactly on it. This is so because the planets formed from the gigantic disk of rubble and gases that formed around the young sun. Many galaxies are basically in the form of a disk as well, including the Milky Way. There are some galaxies that have different shapes. Materials gather into disks probably because of the inherent irregular shapes of the original clouds of material, and characteristics that come about as the materials begin to fall toward the center and then revolve around the cloud's center of gravity.
Planets and stars generally rotate in the same plane (ecliptic plane for planets and galactic plane for stars) because they formed from rotating disks of gas and dust. The conservation of angular momentum causes them to continue rotating in that plane. Any variations in their orbit or rotation can be attributed to gravitational interactions with other objects or external forces acting on them.
Although planets and stars rotate in these planes, there can be some slight variations due to factors like gravitational interactions with other objects, tidal forces, and galactic dynamics. However, the overall rotation in the same plane is a result of their formation processes.
1.8 degrees.
At the moment it is about 5 degrees. It is slowly decreasing. Don't worry though, it will take thousands of years to change much.
No. The Earth's orbit is absolutely parallel to the plane of the ecliptic. Of course, the Earth's orbit is DEFINED as the plane of the ecliptic, so this should be no surprise. All of the other planetary orbits are tilted to the plane of the ecliptic, but not by a whole lot. The Moon's orbit, for example, is tilted about 5 degrees to the ecliptic. The axis of the Earth's spin, however, IS tilted by 23.5 degrees to the plane of the ecliptic.
23.5 degrees
Uranus at 97.8 degrees
17 degrees.
1.8 degrees.
At the moment it is about 5 degrees. It is slowly decreasing. Don't worry though, it will take thousands of years to change much.
The plane of Pluto's orbit is inclined 17.2° to the plane of the ecliptic.
No. The Earth's orbit is absolutely parallel to the plane of the ecliptic. Of course, the Earth's orbit is DEFINED as the plane of the ecliptic, so this should be no surprise. All of the other planetary orbits are tilted to the plane of the ecliptic, but not by a whole lot. The Moon's orbit, for example, is tilted about 5 degrees to the ecliptic. The axis of the Earth's spin, however, IS tilted by 23.5 degrees to the plane of the ecliptic.
23.5 degrees
It's true that the moon and visible planets are always within a few degrees of the ecliptic. They are all on the same plane.
Eris is tilted at an angle of about 44 degrees to the ecliptic. Although it is considered a dwarf planet.
The earth's axis is tilted to 23.48 degrees to the ecliptic plane
Uranus at 97.8 degrees
Mercury, with an inclination of 7 degrees.
All of the other planets have an orbital path that is within six degrees of the ecliptic. The celestial object formerly known as planet Pluto had an orbit that was about 17 degrees off the plane.