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Stellar Structure and Evolution. Stars are the source of almost all of the light our eyes see in the sky. Nuclear fusion is what makes a star what it is: the creation of new atomic nuclei within the star’s core. Many of stars’ properties — how long they live, what color they appear, how they die — are largely determined by how massive ...
Feb 2, 2016 · 3. Gravitationally, there is little immediate effect on earth on a daily basis, though over very long periods of time, stars that pass near enough to the sun could disrupt the orbits of Oort cloud objects and send them towards the sun (and earth or other planets in our Solar System).
Oct 22, 2021 · The star Vega is about twice the mass of the Sun, and it has a temperature of ~10,000 K (compared to ~6000 K for the Sun) and is 40 times more luminous than the Sun. Stars on the main sequence. The Sun is located near the middle of the main sequence. Both the vertical and horizontal axes are on a logarithmic scale.
- Sun Kwok
- 2021
After a supernova, some stars leave behind a super dense neutron star, while the heaviest stars leave a black hole. Based on our understanding of stellar evolution, the Sun will start to run out of core hydrogen in about 5 billion years. The Sun will expand, engulfing several of the inner planets, including Earth.
Solar and Stellar Atmospheres. The atmospheres of stars are very different from those of planets. The Sun’s atmosphere, for instance, is an extremely hot shroud of plasma extending from the surface and stretching many times farther than the Sun’s diameter. “Weather” in that atmosphere can result in plumes of particles that sweep across ...
Sep 23, 2021 · Stars. A star is a sphere of gas held together by its own gravity. The closest star to Earth is our very own Sun, so we have an example nearby that astronomers can study in detail. The lessons we learn about the Sun can be applied to other stars. Tell me more about the Sun; A star's life is a constant struggle against the force of gravity.
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Mar 20, 2019 · A star is born. The life cycle of a star spans billions of years. As a general rule, the more massive the star, the shorter its life span. Birth takes place inside hydrogen-based dust clouds ...
