is the blue-white star, white dwarf star, sun, neutron star, black dwarf star, and protostar rare or common in outer space? which ones are rare in outer space?? which ones are common in outer space?
2007-01-23 11:29:54 · 4 answers · asked by Eee 1 in Science & Mathematics ➔ Astronomy & Space
Of the stars you've listed, sun-like stars are the most common. G dwarfs such as the Sun are abundant and long-lived. Black dwarfs are the rarest - theory says there aren't any. A black dwarf is a white dwarf that has gone cold - 13.7 billion years (the age of the universe) is not long enough for that to happen!
Blue-white stars are the rarest of both main-sequence and giant stars, because they burn out quickly (in a few million years).
I don't know what the relative abundance of the other varieties of star are. Neutron stars, except for pulsars, are very hard to detect. They and white dwarfs are the common forms of dead stars. Protostars are probably relatively scarce, but easy enough to find because they clump together in stellar nurseries.
2007-01-23 12:30:20 · answer #1 · answered by injanier 7 · 0⤊ 0⤋
The cooler and smaller the star, the more of them there are. For example, there are more planets, 8 now, than suns,1, and more moons than planets in our solar system. In order of hottest to coolest, astronomers use the letters O,B,A,F,G,K,M to classify the stars. Our sun is a G type star so there are more of our type suns than O (blue-white) type suns. M is the lowest classification so there are more M type stars (red dwarfs) than any other. It is very hard to see the cooler brown dwarfs so they are not sure there are more of these than M stars.
As to neutron stars, even the biggest and hottest stars have enough fuel to last for millions of years and enough mass to form a black hole after a supernova. The smaller stars like ours have only enough mass to form white dwarfs. The stars cooler than our sun have less mass and burn it so slowly that few of them have yet died within the life time of our galaxy.
So, in order of less to more common, the objects you have listed are blue white type O stars, sun type G stars, white dwarfs, neutron stars and protostars. And M type stars are the most common. We don't know yet about brown dwarfs.
2007-01-23 12:39:17 · answer #2 · answered by Twizard113 5 · 0⤊ 0⤋
well considering how vast space is I doubt that there is anything rare in space even life
2007-01-23 12:09:20 · answer #3 · answered by Concorde 4 · 0⤊ 0⤋
Concord said exactly what i was going to say...he gets the points.
2007-01-23 13:03:15 · answer #4 · answered by captsnuf 7 · 0⤊ 0⤋