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What else can I help you with?
Why have no white dwarfs cooled to form black dwarfs in the galaxy?
According to astronomers and authors Jonathan Weiner and Carl Sagan, white dwarfs - which have been an accepted entities by all astronomers for decades - require an amount of time to "cool down" that well exceeds the current age of the universe - hence there hasn't been enough time for any of them to cool down yet and become "black dwarfs".
What is more common in our galaxy white dwarfs or stellar mass black holes?
There are more white dwarfs. Only the most massive stars can form black holes. White dwarfs form from low to medium mass stars, which far outnumber the supermassive ones.
What type f stars are in the milky way galaxy?
The Milky Way galaxy contains a variety of stars, including main sequence stars (like our Sun), giants, supergiants, white dwarfs, and neutron stars. The most common stars are red dwarfs, making up about 70-80% of all stars in the Milky Way. There are also many other types of stars, such as yellow dwarfs (like our Sun), blue giants, and red giants.
Does the supermassive blackhole at the center of your galaxy contain most of the mass of the galaxy?
No. The super massive black hole at the center of the galaxy has about 4 million times the mass of the sun while the galaxy as a whole has at leas 1 trillion solar masses. In other words the black hole at the center of the galaxy accounts for about one twenty-fifth of one percent of the galaxy's mass.
Explain why astronomers use white dwarfs to date the universe?
They use them to determine the distances of galaxies through the "standard candle" called a type Ia supernova, which are always caused by white dwarfs. They are so bright that they will outshine the galaxy they are in. Because the universe is expanding, the greater a galaxy's distance from us, the greater its red shift. If we know that a certain event has a standard brighteness and we know that the red shift increases at a predictable rate as well, we can use these type Ia supernovae to measure how far off these galaxies are and from this, how long they've had to travel away from a common centre. It is estimated that the universe is about 13.8 billion years old.
What galaxy is a white dwarf in?
There are white dwarfs in every galaxy.
Are red dwarfs in the Milky Way galaxy?
Yes. Loads of them.
What color is most of the stars in your galaxy?
the color of most of the stars in our galaxy are white. They are concered white dwarfs
What does a elliptical galaxy have in it?
mostley lower-main stars and gases and dwarfs
How many percent the spiral galaxy?
how maby percent is the spiral galaxy? {75%}
Why have no white dwarfs cooled to form black dwarfs in the galaxy?
According to astronomers and authors Jonathan Weiner and Carl Sagan, white dwarfs - which have been an accepted entities by all astronomers for decades - require an amount of time to "cool down" that well exceeds the current age of the universe - hence there hasn't been enough time for any of them to cool down yet and become "black dwarfs".
What is the earths percent of the galaxy?
20 percent sikw
What galaxy comprises two or three percent of the total numbers of galaxy?
Guardians of the Galaxy
What is more common in our galaxy white dwarfs or stellar mass black holes?
There are more white dwarfs. Only the most massive stars can form black holes. White dwarfs form from low to medium mass stars, which far outnumber the supermassive ones.
Which stars are most common in the Milky Way Galaxy Why don't you see many of them in H-R diagrams?
The most common stars are Red Dwarfs. It is probable that up to 80% of all stars in the universe are red dwarfs. They are not visible on the on the H-R Diagram because they are hard to observe from Earth due to their low-luminosity. In contrast O-type and B-type supergiants are extremely rare. The reason for this is because they evolve and die quickly.
How many percent of the galaxy have been mapped?
most of it
The majority of stars in our galaxy are?
The majority of stars in our galaxy are red dwarfs, which are smaller and cooler than our sun. They make up about 70-80% of the stars in the Milky Way.
