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This "answer" comes with some caveats;
1. We haven't been able to study any other stars in detail to really examine the local conditions before and after a star's death.
2. All of our mathematical models on how a star works when it's a star often fail to really predict how the star works and what changes, so our models of stellar "death" are even less refined.
With that said; one of the changes that we believe may indicate "incipient" stellar demise is a shrinking of the star's physical size. A star is in a tenuous balance between the nuclear fusion energy that powers the star and attempts to blow it apart, and the gravitational forces that would crush it into a point. When the star's fusion energy begins to wane - for example, when the proportion of helium "ash" in the stellar core increases to the point where it interferes with hydrogen fusion, the gravity will begin to tip the balance and the star will collapse.
This collapse causes the pressure and temperature of the Star to increase. At some point, the temperature and pressure become SO high that the helium "ash" becomes fuel for a more energetic fusion of helium into carbon, nitrogen and oxygen. This new burst of energy can cause the star to expand into a red giant, or blow it apart as a nova.
For example, the star Betelgeuse, the red giant at the shoulder of Orion, appears to be shrinking. We suspect that Betelgeuse will go supernova "Real Soon Now", which in stellar terms means "Probably less than 100,000 years". When it does, it will probably outshine the full Moon - for a month or so. Fortunately for us, it's over 500 light-years away, so it should be safe enough for us to enjoy the fireworks.
What else can I help you with?
What are physical properties of stars?
This is a hard question but stars have their own personality and are all different
What properties does the sun have in common with other stars?
The Sun is similar to other stars in that it is a massive ball of hot gas fueled by nuclear fusion, emitting light and heat. It also has a magnetic field, sunspots, and solar flares like other stars. Additionally, the Sun follows the same lifecycle stages as other stars, starting as a protostar, then becoming a main sequence star, and eventually ending its life as a white dwarf.
What properties do scientists use to group stars?
Scientists use properties such as luminosity, temperature, mass, size, and spectral characteristics to group stars. These properties help categorize stars into different classes based on their similarities and differences.
What is a stars apparent magnitude?
An apparent magnitude is a measure of how bright a star appears from Earth. The lower the apparent magnitude, the brighter the star appears in the night sky. Negative values indicate very bright stars, while positive values indicate fainter stars.
What is a person who studies stars as a career?
An astronomer is a person who studies stars as a career. They use telescopes and other observation methods to study the properties of stars, their formation, evolution, and behavior.
What do the little stars mean in Super Smash Bros melee?
Little stars indicate how many KO's you have made in Melee mode. The stars change if you change your name to one of your created names. Try to get as many stars as you can.
What are physical properties of stars?
This is a hard question but stars have their own personality and are all different
What are some properties of stars?
This is a hard question but stars have their own personality and are all different
What does the color of a galaxy indicate?
It indicates the brightness of all the stars.
What do scientist use to learn about the properties of stars?
spectroscope
What do astronomers study to learn the properties of stars?
The Spectra.
What do a scientist use to study the properties of stars?
Telescope
What properties does the sun have in common with other stars?
The Sun is similar to other stars in that it is a massive ball of hot gas fueled by nuclear fusion, emitting light and heat. It also has a magnetic field, sunspots, and solar flares like other stars. Additionally, the Sun follows the same lifecycle stages as other stars, starting as a protostar, then becoming a main sequence star, and eventually ending its life as a white dwarf.
What properties do scientists use to group stars?
Scientists use properties such as luminosity, temperature, mass, size, and spectral characteristics to group stars. These properties help categorize stars into different classes based on their similarities and differences.
What does the three stars in a book mean?
The three stars in a book typically indicate a rating or review system, where three stars may represent an average or satisfactory rating. It could vary depending on the specific system or platform being used.
What do bronze stars on a European African middle eastern ribbon mean?
Battle stars indicate campaign battles
How does a stars mass indicate?
When a star is at the end of its lifetime its mass increases.
