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.
- Where are population 1 stars found in the Milky Way?
- What is a Population 1 star?
- Which region of the Milky Way contains a population that consists mostly of old stars?
- Are there any first-generation stars left?
- Is there a star bigger than a galaxy?
- Why do the oldest stars we observe contain almost nothing but hydrogen and helium?
- Did first generation stars have planets?
- What type of galaxy has the youngest stars?
- What is older than the universe?
- Will our universe end?
- How far away is the heat death of the universe?
- What is the lifespan of the universe?
- Will entropy destroy universe?
Where are population 1 stars found in the Milky Way?
All known Population I members occur near and in the arms of the Milky Way system and other spiral galaxies. They also have been detected in some young irregular galaxies (e.g., the Magellanic Clouds).
What is a Population 1 star?
Populations I and II Stars Population I stars include the sun and tend to be luminous, hot and young, concentrated in the disks of spiral galaxies. They are particularly found in the spiral arms.
Which region of the Milky Way contains a population that consists mostly of old stars?
Are there any first-generation stars left?
Astronomers using the NASA/ESA Hubble Space Telescope have found no evidence of hypothetical first-generation stars — called Population III stars — as far back as when the Universe was just 500 million years old. An artist’s impression of the early Universe.
Is there a star bigger than a galaxy?
The sun is a G-type star, a yellow dwarf — pretty average sized on the cosmic scale. But some “hypergiant” stars are much, much larger. 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).
Why do the oldest stars we observe contain almost nothing but hydrogen and helium?
Answer: A star made of only helium and hydrogen would have to be among the first generation of stars ever born, arising out of the primordial mix of elements that came from the Big Bang.
Did 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 type of galaxy has the youngest stars?
|Term What is the shape of the Milky Way Galaxy?||Definition A huge, slowly revolving disk.|
|Term Which galaxy type has the oldest stars?||Definition Elliptical|
|Term Which galaxy types has the youngest stars?||Definition Irregular|
|Term Which galaxy type are typically the largest galaxies in the universe?||Definition Spiral|
What is older than the universe?
A constant of 67.74 km per second per megaparsec would lead to an age of 13.8 billion years, whereas one of 73, or even as high as 77 as some studies have shown, would indicate a universe age no greater than 12.7 billion years. It’s a mismatch that suggests, once again, that HD 140283 is older than the universe.
Will our universe end?
If the Universe holds enough matter, including dark matter, the combined gravitational attraction of everything will gradually halt this expansion and precipitate the ultimate collapse. Over time, galaxies, then individual stars, will smash into each other more frequently, killing off any life on nearby planets.
How far away is the heat death of the universe?
This is the timeline of the Universe from Big Bang to Heat Death scenario. The different eras of the universe are shown. The heat death will occur in 10100 years, if protons decay.
What is the lifespan of the universe?
Today, astronomers have derived two different measurements of the age of the universe: a measurement based on the observations of a distant, infant state of the universe, whose results are an age of around 13.77 billion years (as of 2018), 13.772±0.040 billion years within the Lambda-CDM concordance model as of 2018; …
Will entropy destroy universe?
Once entropy reaches its maximum, theoretical physicists believe that heat in the system will be distributed evenly. This means there would be no more room for usable energy, or heat, to exist and the Universe would die from ‘heat death’. Put simply, mechanical motion within the Universe will cease.
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