Monday, November 23, 2009

Alpha Centauri Formation


The first steps of forming Alpha Centauri is by a nebula. In a nebula gas and dust particles float around. They are free to roam the insides of the nebula. After a while inside the nebula the gas and dust particles starts to collect. They float closer together. The third step is that the density pulls the gas and dust particles . The fourth step of the formation of Alpha Centauri is a protostar forms. A protostar is very small and after a while stars to expand.

The fifth step is that the core becomes very dense because gravity's pressure on the core. The gravitational pull is so strong that it is able to make the core very, very dense. Because of the heat and pressure on the core, fusion begins and creates more and more heat and more light. Fusion is when the Hydrogen and Helium atoms collide. Those atoms that collide create heat and light. When the gas and dust particles come together it's accretion. Accretion is when small objects collide and stick together just like what happens with the gas and dust particles in the nebula.

Friday, November 13, 2009

Alpha Centauri


Alpha Centauri is a Star, just like the Sun. Although the year Alpha Centauri was discovered, and who discovered it is unknown. That makes me wonder what is Alpha Centauri? Well Alpha Centauri is a triple star, which means that there are three different parts. It has two sun-like stars. Alpha C. A, and Alpha C. B. The third part of Alpha Centauri is Proxima Centauri, which is a red dwarf.

Alpha Centauri is one of the biggest stars in the constellation. The Sun may seem like a big star but is it really? Yes it is but it isn't the biggest. Alpha Centauri is 23 times bigger than The Sun. It's funny because stars seem to be so small, and we only pay attention to the sun. Alpha Centauri moves in a very wide orbit. It is the star that is closest to Earth.

Monday, November 9, 2009

Pluto A Planet?


In 2007 Pluto was classified as an object on the Kupier Belt, which meant that it was no longer a planet. To be a planet you need to orbit around the Sun, which Pluto does. It also has to have enough gravitational pull to be able to control any other objects in the orbit. Pluto also does that. To also be a planet you need to have a clear neighborhood. That is were Pluto is disqualified. Pluto doesn't have a clear neighborhood it is 0.07 times the mass of other objects in the orbit. Pluto may be considered the ninth planet after Neptune, but there is still something on the Kupier Belt that is larger then Pluto such as Eris.

However Pluto may not be a planet but my body isn't a planet either. Alpha Centauri is a star. It is the star that is closer to Earth. Alpha Centauri is not a planet because it does not orbit around a star because it is a star. It also isn't a planet because it doesn't have enough gravitational pull to be able to control any other objects in its orbit. It also isn't a planet because it is not spherical.

Wednesday, November 4, 2009

Alpha Centauri Diameter


Alpha Centauri has a diameter of 41 trillion km. The sun has a diameter of 1,391,000 km. Alpha Centauri is 23 times more than the Sun. Alpha Centauri will not really fit into the Sun. However the Sun can fit into Alpha Centauri 29,475,197 times. Wow now that's a lot. That proves many theories that they're things bigger than the Sun in the Solar System.