small ones, like our sun and smaller.
There are two kinds of "dead" stars. One, called "brown dwarfs," even though they're actually dull red, are "dead" through not being able to fuse hydrogen into helium. They generate heat through their gravity, as Jupiter does. The other kind are the remnants of supernovae, which include white dwarfs, neutron stars and black holes. The first two of these aren't dead in the same sense as brown dwarfs, since they still radiate from fusion. Black holes and dead (except for gravity) because the matter at their hearts has become so compressed, it's been "pulled out of the universe" an occupies no space at all.
There are various types of stars, such as main sequence stars (like our sun), red giants, white dwarfs, neutron stars, and black holes. These stars differ in size, mass, temperature, and lifespan. They are classified based on their characteristics and the stage of their evolution.
Stars that are cooler than the sun are classified as red dwarfs. These stars have surface temperatures between 2,600 to 4,000 degrees Celsius, compared to the sun's surface temperature of about 5,500 degrees Celsius. Red dwarfs are the most common type of star in the universe.
This star would be a white dwarf, as it has a high surface temperature of 20000 K but a low absolute magnitude of 10. White dwarfs are small, dense remnants of low to medium mass stars that have exhausted their nuclear fuel and collapsed.
Our own Sun is the closest, of course. Beyond that, the next closest star is the red dwarf Proxima Centauri, which is too dim to see with the naked eye, at 4.2 light years. Next closest are the two stars in the Alpha Centauri system, at 4.5 LY. See the link below for the list of nearer stars. The closest really bright star is Sirius A.
There are two kinds of "dead" stars. One, called "brown dwarfs," even though they're actually dull red, are "dead" through not being able to fuse hydrogen into helium. They generate heat through their gravity, as Jupiter does. The other kind are the remnants of supernovae, which include white dwarfs, neutron stars and black holes. The first two of these aren't dead in the same sense as brown dwarfs, since they still radiate from fusion. Black holes and dead (except for gravity) because the matter at their hearts has become so compressed, it's been "pulled out of the universe" an occupies no space at all.
There are various types of stars, such as main sequence stars (like our sun), red giants, white dwarfs, neutron stars, and black holes. These stars differ in size, mass, temperature, and lifespan. They are classified based on their characteristics and the stage of their evolution.
A dwarf star could form in different ways depending on what kind. Red dwarfs and brown dwarfs are formed when nebula compresses into a giant burning ball of gas, just like most stars do; white dwarfs are formed after a star became a red giant and blown off its outer layers, the remaining core became a white dwarf; black dwarfs are formed after white dwarfs cooled down and stopped emitting visible light.
Alrisha is a binary star (two stars) that are both white dwarfs. It is located at the bottom of Pisces, and is the star that binds the tails of the two Pisces fish together. Since both stars are white dwarfs, the stars are degenerate, meaning they no longer fuse energy, and are in the process of cooling down.
That's more or less the description of the so-called "main sequence". Those are the stars that get their energy by fusing hydrogen into helium.
Stars that are cooler than the sun are classified as red dwarfs. These stars have surface temperatures between 2,600 to 4,000 degrees Celsius, compared to the sun's surface temperature of about 5,500 degrees Celsius. Red dwarfs are the most common type of star in the universe.
when Dwarf Stars run out of hydrogen they form Red Giant stars, then from that they become White dwarf stars when the outer layers shed, forming a planetary nebula.when giant stars or supergiant stars run out of hydrogen they form red supergiant stars
Snow White and the Seven Dwarfs is a European fairy tale that falls under the genre of folklore. It has been popularized through various adaptations, including the famous animated film by Disney.
This star would be a white dwarf, as it has a high surface temperature of 20000 K but a low absolute magnitude of 10. White dwarfs are small, dense remnants of low to medium mass stars that have exhausted their nuclear fuel and collapsed.
Our own Sun is the closest, of course. Beyond that, the next closest star is the red dwarf Proxima Centauri, which is too dim to see with the naked eye, at 4.2 light years. Next closest are the two stars in the Alpha Centauri system, at 4.5 LY. See the link below for the list of nearer stars. The closest really bright star is Sirius A.
they can range from red for the least hot stars, through orange, yellow and eventually to white and blue for the hottest stars.
Old, low-mass stars like red dwarfs are most likely to be part of the spheroidal population. These stars are typically found in galactic spheroids, which are regions of galaxies composed of older stars in a more spherical distribution.