Where are O and B type stars most likely to be found?
O-type main-sequence stars tend to appear in the arms of spiral galaxies. This is because, as a spiral arm moves through space, it compresses any molecular clouds in its way. The initial compression of these molecular clouds leads to the formation of stars, some of which are O- and B-type stars.
What is most of the mass in the galaxy made of?
And it’s tiny on the scale of the most abundant, mysterious matter in the galaxy: the dark stuff. Again: 84 percent of the galaxy is made up of dark matter.
What keeps nuclear fusion from going out of control in a main sequence star?
Energy is generated in the star’s hot core, then carried outward to the cooler surface. Inside a star, the inward force of gravity is balanced by the outward force of pressure. The star is stabilized (i.e., nuclear reactions are kept under control) by a pressure-temperature thermostat.
Which is the oldest component of the Milky Way galaxy?
the stellar halo
As the oldest visible component of the galaxy, the stellar halo holds important clues to the formation of the Milky Way.
What is the rarest star in the universe?
Each is classified as an O-type star — and O-type stars are the rarest main sequence stars in the universe, comprising just 0.00003% of known stars.
Can B-type stars have planets?
B-type stars known to have planets include the main-sequence B-types HIP 78530, the subgiants Kappa Andromedae and a few (19 are now known) B-type subdwarfs.
How many black holes are in the Milky Way?
Related Stories. Astronomers estimate that 100 million black holes roam among the stars in our Milky Way galaxy, but they have never conclusively identified an isolated black hole.
Can a galaxy have two suns?
“Surely not impossible, but it seems unlikely.” Although the solar system has only one sun, most stars like Earth’s sun are binaries— two stars orbiting each other as a pair. Increasingly, astronomers are discovering planetary systems with twin suns (like Luke Skywalker’s fictional home planet Tatooine in “Star Wars”).
What happens when a star runs out of hydrogen?
Eventually the core of the star runs out of hydrogen. When that happens, the star can no longer hold up against gravity. Its inner layers start to collapse, which squishes the core, increasing the pressure and temperature in the core of the star.
What will happen if a low mass main sequence star runs out of hydrogen fuel?
When a main sequence star begins to run out of hydrogen fuel, the star becomes a red giant or a red supergiant. After a low- or medium-mass star has become a red giant, the outer parts grow bigger and drift into space, forming a cloud of gas called a planetary nebula.
Is the Sun in the halo or disk?
The disk of the Galaxy is a flattened, rotating system which contains the Sun and other intermediate-to-young stars. The sun sits about 2/3 of the way from the center to the edge of the disk (about 25,000l.y. by the most modern estimates).
How many suns are in the Milky Way?
How many suns are there in this universe? There are an estimated 100 billion stars in our Milky Way galaxy alone making up about 100 billion suns. So, there are likely billions of other galaxies with billions of suns.
What is the weirdest star name?
Two stars in theDelphinus diamond have rather odd names: Sualocin (Alpha Delphini) and Rotanev(Beta Delphini). They first appeared in the Palermo Star Catalogue in 1814,but nobody seemed to have a clue as to their origin.
What is a corrupt star?
Corrupt stars are stars which became corrupted. Their origin is unknown. Currently, only 3 corrupt stars have appeared in Season 2. Gray corrupt stars are worse than colored corrupt stars.
Can B stars support life?
Because of these two statements, most of the stars that are being searched for life-bearing planets are F, G, K, or M stars. O, B, and most A stars live such short lifetimes that we expect that their planets will not be able to develop complex life forms.
Can B-type stars go supernova?
A well-known B-type star is Rigel, the brightest star in Orion. Fun fact: When O-type and B-type stars die, the explosion is so massive that it triggers a supernova, and its remnants become either a neutron star or a black hole.
Where is the closest black hole to Earth?
Researchers believe that black holes and galaxies grow alongside each other: the larger the galaxy, the larger its black hole. The closest supermassive black hole is the one at the center of our own Milky Way galaxy, Sagittarius A*, some 50,000 light-years away. So far, no intermediate black holes have been measured.
Is there an actual photo of the Milky Way galaxy?
We can only take pictures of the Milky Way from inside the galaxy, which means we don’t have an image of the Milky Way as a whole.
Is Tatooine possible?
Desert planet Tatooine isn’t the most inviting world in the Star Wars galaxy, but its twin suns offer a visually stunning end to each day and keep inhabitants warm. It also seemed firmly rooted in the realm of science fiction, but scientists have found evidence that habitable worlds with multiple stars might exist.
How long would we live if the Sun burned out?
With no sunlight, photosynthesis would stop, but that would only kill some of the plants—there are some larger trees that can survive for decades without it. Within a few days, however, the temperatures would begin to drop, and any humans left on the planet’s surface would die soon after.
What is a dead star called?
In a new study published in Nature, we show a glimpse of the possible future of our Solar System, when the Sun burns through all its hydrogen fuel and becomes a dead star called a white dwarf.
What is a dying star called?
And the most massive stars die by exploding as supernovae.
How will a low mass star end its life?
Low mass stars simply die by burning up their fuel to leave behind white dwarfs (contracted low mass stars about the size of the Earth) which themselves cool and contract further to black dwarfs.
Which is better low mass star or heavy mass star?
Low mass stars are cooler, and are reddish. High mass stars are hotter, and are white or blue white. Extremely high mass stars may even shine a pale violet, which is more “blue” than blue white. High mass stars are also much brighter than low mass stars, because they produce much more energy.
Is there a barrier at the edge of the galaxy?
But the map also revealed the mysterious “barrier,” a clear point where the density of cosmic rays drops off significantly at the edge of the galactic center. The source of this phenomenon is harder to pinpoint, the researchers said, but it may involve the jumble of magnetic fields near our galaxy’s dense core.