Pluto still one of the planet in Solar System???

Brian Wong Hui Ong

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Pluto still one of the planet in Solar System???

« on: October 03, 2010, 10:33:19 AM »

The International Astronomical Union (IAU) is a collection of professional astronomers, at the Ph.D. level and beyond, active in professional research and education in astronomy.

1930 until 2006, Pluto was considered the Solar System's ninth planet. In the late 1970s, following the discovery of minor planet 2060 Chiron in the outer Solar System and the recognition of Pluto's very low mass, its status as a major planet began to be questioned.

On August 24, 2006, the International Astronomical Union (IAU) defined what it means to be a "planet" within the Solar System. This definition excluded Pluto as a planet and added it as a member of the new category "dwarf planet" along with Eris and Ceres. After the reclassification, Pluto was added to the list of minor planets and given the number 134340.

Primary Science Text Book continue to hold that Pluto should be classified as a planet. Who is right??? IAU or Textbook Science Malaysia?


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Erwan bin Roslan

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Re: Pluto still one of the planet in Solar System???

« Reply #1 on: October 03, 2010, 12:56:00 PM »

Saya tak bersetuju dengan keputusan IAU. Pluto adalah sebuah planet sebab jasadnya stabil, orbitnya mengelilingi matahari dan mempunyai tiga bulan iaitu Charon, Nix dan Hydra.

Sebagai warga sistem solar, kita patut berbangga dengan keunikan dan kepelbagaian planet-planet kita. Ada yang kecil, ada yang besar. Ada berjasad gas, ada yang berbatu, bahkan ada yang berais.

Tindakan menukar status planet kepada minor planet seperti dalam kes Pluto ini tidak ubah seperti mengasingkan sebuah kaum minoriti dalam sesuatu masyarakat. Saintis IAU tidak sepatutnya berfikiran begitu.

Siapa yang betul? IAU atau Textbook Science Malaysia?
Sebenarnya Clyde W. Tombaugh yang betul!