Question: What Are The 7 Main Types Of Stars?

What was the first star?

The very first stars likely formed when the Universe was about 100 million years old, prior to the formation of the first galaxies.

As the elements that make up most of planet Earth had not yet formed, these primordial objects – known as population III stars – were made almost entirely of hydrogen and helium..

What is the longest living star?

red dwarfsCharacteristics of Red-Giant & White-Dwarf Stars The stars with the longest lifetimes are red dwarfs; some may be nearly as old as the universe itself.

What is the most famous G type star?

type G2VThe most famous G type star is our own Sun (type G2V), a full description of which is available in the Solar System section. This type of star typically weighs about 0.8 to 1.25 times the mass of the Sun, but, yet again, not all are typical as you will see.

What are the different types of star?

Scientists classify stars by temperature and the elements they absorb, which are called their spectra. They have divided stars into seven main types. There are seven main types of stars: O, B, A, F, G, K and M. The O stars are the bright, hot, blue stars and the M stars are the dimmer, cooler, red stars.

What is the brightest star?

Sirius ASirius, also known as the Dog Star or Sirius A, is the brightest star in Earth’s night sky. The name means “glowing” in Greek — a fitting description, as only a few planets, the full moon and the International Space Station outshine this star.

Are Blue Stars rare?

Blue Period Luminous blue variable (LBV) stars are indeed incredibly rare; astronomers have only identified about 20 (maybe) and suspect there are only a few hundred in the Milky Way, tops. … That puts their surface temperature in the 10,000 – 25,000K range; several times hotter than our own star.

What color is the hottest star?

blueThe color of a star is linked to its surface temperature. The hotter the star, the shorter the wavelength of light it will emit. The hottest ones are blue or blue-white, which are shorter wavelengths of light. Cooler ones are red or red-brown, which are longer wavelengths.

What is the hottest star in the universe?

Eta CarinaeEta Carinae could be as large as 180 times the radius of the Sun, and its surface temperature is 36,000-40,000 Kelvin. Just for comparison, 40,000 Kelvin is about 72,000 degrees F. So it’s the blue hypergiants, like Eta Carinae, which are probably the hottest stars in the Universe.

Is our sun a rare star?

The Short Answer: Our Sun is an average sized star: there are smaller stars and larger stars, even up to 100 times larger. … There are billions more stars in the Milky Way galaxy – the galaxy we call home. And there are many, many more in the rest of the universe.

What are the most common types of stars in our universe?

Red Dwarf Star Red dwarf stars are the most common kind of stars in the Universe. These are main-sequence stars but they have such low mass that they’re much cooler than stars like our Sun.

What is the rarest type of star?

Each is classified as an O-type star — and O-type stars are the rarest main sequence stars in the universe, comprising just 0.00003% of known stars. They’re extremely prone to going supernova and collapsing into black holes or neutron stars.

How many G type stars are there?

As many as 512 or more stars of spectral type “G” (not including white dwarf stellar remnants) are currently believed to be located within 100 light-years or (or 30.7 parsecs) of Sol — including Sol itself.

Which is the biggest known star?

Answer: The largest known star (in terms of mass and brightness) is called the Pistol Star. It is believed to be 100 times as massive as our Sun, and 10,000,000 times as bright! In 1990, a star named the Pistol Star was known to lie at the center of the Pistol Nebula in the Milky Way Galaxy.

Which color star is the coolest?

redStars have different colors, which are indicators of temperature. The hottest stars tend to appear blue or blue-white, whereas the coolest stars are red.

What is the closest star to our sun?

Alpha CentauriA photo of Alpha Centauri. The closest star to Earth are three stars in the Alpha Centauri system. The two main stars are Alpha Centauri A and Alpha Centauri B, which form a binary pair.