What is the closest O-type star?
Closest O type stars
| star | distance (kpc) | magnitude (V) |
|---|---|---|
| ζ Pup | 0.44 | 2.3 |
| θ Ori C (*) | 0.5 | 5.1 |
| ζ Ori | 0.5 | 1.6 |
| η Car (*) | 2.6 | -1 to 7 |
What is an example of an O-type star?
Type O Stars. One example is Zeta Orionis Aa, a type O intermediate luminous supergiant star, the primary star in the Zeta Orionis triple star system. It is destined to become a red super giant, similar to Betelgeuse, and its ultimate fate is probably to explode in a supernova within a few million years.
What stars are Type O?
Class O includes bluish white stars with surface temperatures typically of 25,000–50,000 K (although a few O-type stars with vastly greater temperatures have been described); lines of ionized helium appear in the spectra. Class B stars typically range from 10,000 K to 25,000 K and…
What is the mass of O stars?
50 solar masses
What is a 1st generation star?
Composition of the first stars The first generation of stars, also known as Population III stars, were made almost entirely of hydrogen and helium. Later generations of stars, including the Sun, contain heavier elements like oxygen, carbon, and iron, which formed in the cores of earlier stars.
Why do we think the sun is not a 1st generation star?
Astronomers assert that the sun is not a first-generation star because of the presence of heavy elements. Among astronomers, elements heavier that hydrogen and helium are labeled metals. The sun has been found to be comparatively metal-rich, meaning that it is at least a second-generation star.
What star was before sun?
At the earliest point, our solar nebula looked like the Eagle Nebula, after millions of years, it was more like the Pleiades Star Cluster, with bright stars surrounded by hazy nebulosity.
Do first generation stars have planets?
First-generation stars could only have had planets of hydrogen & helium (plus a smattering of lithium), since heavier elements were only ejected into the medium with the supernova deaths of first-generation stars; consequently, when they formed, there would have been no oxygen, silicon or magnesium to form rocky …
What came first stars or planets?
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.
Is there a star bigger than a galaxy?
But some “hypergiant” stars are much, much larger. Perhaps the biggest star known is UY Scuti, which could fit more than 1,700 of our suns. Galaxies are collections of star systems and everything that is inside those systems (such as planets, stars, asteroids, comets, dwarf planets, gas, dust and more).
How many generations old is the sun?
Sun
| Observation data | |
|---|---|
| Luminosity (Lsol) | 3.828×1026 W ≈ 3.75×1028 lm ≈ 98 lm/W efficacy |
| Color (B-V) | 0.63 |
| Mean radiance (Isol) | 2.009×107 W·m−2·sr−1 |
| Age | ≈ 4.6 billion years |
How many generations is 1 billion years?
Life began about 3.8 billion years ago so that is about 190 million human generations and about 1 to 100 billion bacterial generations.
What is the life of Sun?
This means that it is in the most stable part of its life, converting the hydrogen present in its core into helium. For a star the size of ours, this phase lasts a little over 8 billion years. Our solar system is just over 4.5 billion years old, so the sun is slightly more than halfway through its stable lifetime.
Is water older than the sun?
As much as half of the water in Earth’s oceans could be older than the Sun, a study has found. If most of the original water molecules were broken up, water would have had to reform in the early Solar System. …