Just a recap, there are currently eight planets in our solar system. The outermost planet in our solar system is Neptune. Beyond Neptune is Pluto which is now considered as a “dwarf planet”. This was declared by International Astronomical Union way back 2006.
You have to know that Spanish and British astronomers are saying that there are at least two planets in the Solar System waiting to be revealed. This article is published in the British Journal’s Monthly Notices of the Royal Astronomical Society.
Singaporean astronomers are delighted of the news. The research is based on the calculations of trans-Neptunian objects (TNO). What is TNO? Here are some things that you need to know about TNO:
- Principle: TNO refers to any minor planet (in the Solar System) that orbits the sun. Its average distance is greater than Neptune which is 30 astronomical unit (AU).
- Classification: TNOs are classified according to two groups – Kuiper Belt and the Scattered Disk. The Kuiper Belt encompasses objects with average distance of 30 to 55 AU to the sun. Scattered disk on the other hand includes objects that are farthest from the sun.
- Famous trans-Neptunian objects: The most famous trans-Neptunian object is 132340 Pluto followed by 1992 QB1, 1998 WW31, 1996 TL66, 1995 TL8, 1993 RO, 20000 Varuna, 50000 Quaoar and many more.
The space has limitless possibilities and this is why many people are attracted to it. Here in Singapore, there are many conservatories that you can consider if you want to learn more of the space you live in. You can be an astronomer anytime you want.