Yes, the sun is considered a middle-aged star, around 4.6 billion years old. It is classified as a main-sequence star in the later stages of its life cycle.
No, Vega is a main-sequence star, meaning it is currently fusing hydrogen into helium in its core. The star is relatively young compared to our Sun, so it still has a long life ahead of it on the main sequence.
A big ball of hot gases in space is called a star.
A group of stars that form when a lot of gases and dust come together is called a star cluster. Star clusters can be either open clusters, which are loosely bound and contain young stars, or globular clusters, which are tightly bound and contain older stars.
A nebula is a cloud of substances and gases that can form into a star. A star is a ball of hydrogen and helium with trace amounts of other gases. A supernova is the death of a star.
Hydrogen and Helium
Hydrogen and helium
Dance because its my favorite
Hydrogen and helium
All of them, that's how a star gets to be "old" ... it converts its hydrogen into helium.
The star's mass. More mass will make the star hotter, and will increase the pressure in the center; this will make the star burn its fuel faster.When a star is on the "main sequence", it burns hydrogen-1, converting it into helium-4.
Yes, the sun is considered a middle-aged star, around 4.6 billion years old. It is classified as a main-sequence star in the later stages of its life cycle.
As the gases in a protostar begin to collapse, the central core begins to heat up due to pressure. As more gases are absorbed, the greater the pressure. Once the temperature of the core reaches 10 million degrees K, hydrogen fusion begins, and the star begins it's life on the main sequence. The star will stay on the main sequence whilst it still has hydrogen to fuse. Once all the hydrogen has been used, the star will drop out of the main sequence. Protostar stage in the stellar evolution. [See related question]
The Moon is not a star because a star is made of a gases.
Wikipedia lists it as a main sequence star. That means that it still has significant amounts of hydrogen. Main sequence stars also typically have a smaller amount of helium (remember, the hydrogen gradually converts to helium), and even smaller amounts of the so-called "metals" (i.e., all other elements).
All of the forces act to make a star. Gravity is the main force, which pulls everything together, and the other forces ignite the star.
A big ball of hot gases in space is called a star.