Pluto and Beyond
- Before 2006, students discovered that our planetary group had nine planets, not eight. The one considered the 10th, Pluto, circles uttermost from our Sun.
- In any case, in 2006, the International Astronomical Union proclaimed that Pluto doesn’t consider a planet. It is more smaller than Earth’s Moon.
- It circles far out in a belt of space rocks past Neptune (however Pluto occasionally draws nearer to the Sun than Neptune), and needs more gravity to clear the area around its way.
- In this way, it was downsized to a “dwarf planet,” or a planetesimal.
Formation of Solar System
The formation of solar system was very energetic and unique. The Sun and the planets produced the solar nebula, made of cloud of gas and dust, some 4.6 billion years ago. The collapse of the solar nebula was mostly due to a supernova explosion. The planets formed in a thin disk circling the Sun, which formed at its center. Moons evolved around the gas giant planets in a similar way. In the outer regions of the solar system, comets consolidated and were propelled to considerable distances by near gravitational collisions with the massive planets. A powerful solar wind removed gas and dust from the system after the Sun began. The stony remains are represented by the asteroids.
We will answer a few of the questions in this article, such as what are planets? from where did they originate? why are some things gaseous and some stony? How does our planet look like?
Table of Content
- History:
- Formation:
- Subsequent evolution:
- The Birth of the Sun:
- The Birth of the Planets:
- Earth’s Moon:
- Pluto and Beyond: