What explosive cosmic event was seen with the naked eye in 1987 for the first time 383 years?
The explosive cosmic event seen with the naked eye in 1987 after 383 years was the supernova SN 1987A. It occurred in the Large Magellanic Cloud, a neighboring dwarf galaxy of the Milky Way. It was the closest observed supernova since the invention of the telescope.
Location of starter on 1996 cadillac north star?
On a 1996 Cadillac Northstar engine, the starter is located underneath the intake manifold. It is not in a typical location, so accessing it may require removing other components to reach it. Be sure to disconnect the battery before attempting to replace the starter.
Simple answer:
It is a star that is not massive enough to initiate helium fusion, instead it just burns hydrogen at a very slow rate. Red dwarf's are the most common and longest lived stars known. [See related link for more information]
More complex answer:
According to the Hertzsprung-Russell diagram, a red dwarf star is a small and relatively cool star, of the main sequence, either late K or M spectral type. They constitute the vast majority of stars and have a diameter and mass of less than one third that of the Sun (down to 0.08 solar masses, which are brown dwarfs) and a surface temperature of less than 3,500 K. They emit little light, sometimes as little as 1/10,000th that of the sun. Due to the slow rate at which they burn hydrogen, red dwarfs have an enormous estimated lifespan; estimates range from tens of billions up to trillions of years. Red dwarfs never initiate helium fusion and so cannot become red giants; the stars slowly contract and heat up until all the hydrogen is consumed. In any event, there has not been sufficient time since the Big Bang for red dwarfs to evolve off the main sequence.
The fact that red dwarfs remain on the main sequence while older stars have moved off the main sequence allows one to date star clusters by finding the mass at which the stars turn off the main sequence. In addition, the fact that no red dwarfs have evolved off the main sequence has been observed as evidence that the universe has a finite age.
One mystery which has not been solved as of 2004 is the lack of red dwarf stars with no metals (in astronomy a metal is any element other than hydrogen and helium). The Big Bang model predicts the first generation of stars should have only hydrogen, helium, and lithium. If such stars included red dwarfs, they should still be observable today, but are not. The conventional explanation is that without heavy elements, low mass stars cannot form. Since a low mass star fuses hydrogen in the presence of metals, then an early protostar of such a low mass devoid of metals would not 'go nuclear', it would simply sit around as a clump of gas until more material came along. This supports the theory that the first stars were extremely high mass population III stars which died quickly and produced the metals necessary for low mass stars to form later.
Red dwarf stars are believed to be the most common star type in the universe. Proxima Centauri, the nearest star to the Sun, is a red dwarf (Type M5, magnitude 11.0), as are twenty of the next thirty nearest. However, due to their low luminosity, few are known.
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Red dwarf is also a British sci fi TV series.
Where is the North Star today?
According to Scientific American: "The North Star, or Polaris, is the brightest star in the constellation Ursa Minor, the little bear (also known as the Little Dipper)."
Click on the link to the right for their full article (with a picture showing the location).
AnswerAnother way to find Polaris is to locate the Big Dipper (Ursa Major) which is usually easy to find from the Northern hemisphere, and then look at the two stars on the lip, or front side of the cup. These are Merak, on the bottom, and Dubhe on the tip of the lip. If you estimate the distance between these two and then follow a line straight up from Merak through Dubhe about three times that distance, you will find Polaris. It will appear to be approximately due North from any place it can be seen (which is nice for orienting yourself at night). As mentioned above, Polaris is also part of the Little Dipper (Ursa Minor) and is the star at the end of the handle.Because Polaris lies nearly in a direct line with the axis of the Earth's rotation "above" the North Pole - the north celestial pole - Polaris stands almost motionless on the sky, and all the stars of the Northern sky appear to rotate around it. Therefore, it makes an excellent fixed point from which to draw measurements for celestial navigation and for astrometry.
Additional AnswerIf you mean where in space is the star, relative to earth, it is 431 light years away from earth, about 2 degrees away from a line going from the south pole through the north pole.The web site in the related links also shows the direction of Polaris relative to Earth in the galaxy.
What is the order of the white camelia?
The Order of the White Camelia was formed during the reconstruction period in Louisiana. It was not the Ku Klux Klan, as that organization was founded in Tennesee. The Camelia was far more brutal than the Ku Klux Klan and in large part helped bring the reconstruction era to a close after the Colfax riot in Louisiana. A good book referencing the White Camelia is Ted Tunnel's "The Crucible of Reconstruction".
How long can a white dwarf shine?
White dwarf stars are calculated to continue emitting energy for incredibly long amounts of time. It is believed that they can do so for longer than the age of the universe, hence, none have cooled off to black dwarf status yet. Some white dwarfs have been found around 100 light years from Earth and are thought to be the oldest known stars at 11 to 12 billion years old.
Yes, stars can explode and die, a process often referred to as a supernova. This typically occurs at the end of a massive star's life cycle when it exhausts its nuclear fuel, leading to a catastrophic collapse of its core followed by an explosive outburst. Smaller stars end their lives more quietly, shedding their outer layers to form planetary nebulae, while the core remains as a white dwarf. These stellar deaths play a crucial role in enriching the universe with elements necessary for the formation of new stars and planets.
What is the fate of an isolated brown dwarf?
The fate of an isolated brown dwarf depends on its mass. If the brown dwarf is below a certain threshold (about 13 times the mass of Jupiter), it will cool and fade over time, eventually becoming a cold, dark object called a "rogue planet." If the brown dwarf is more massive, it may undergo fusion reactions and become a star, though this is rare for isolated brown dwarfs.
S-U-P-E-R The word "super" (colloquial for excellent, superb, or great) is not capitalized. As a prefix, "super-" has the reinforcing meaning "over" or "above". Sometimes used with a hyphen to create neologisms inferring a superior ability. (e.g. "super-strong" glue)
What does Nova Brittania mean?
It might be something to do with, Nova Britannia, a provincia of Nova Roma.
See related web site
How do you describe a nebula such as the Crab Nebula?
The Crab Nebula is a supernova remnant and pulsar wind nebula.
What are the names of stars in our galaxy?
It has been estimated that there are over a hundred billion galaxies. Not all of them have been named.
The most famous galaxies are:
Milky Way Galaxy: The galaxy where our Solar System resides.
Andromeda Galaxy: Our nearest large galaxy.
Large Magellanic Cloud: Brightest patch of nebulosity in the sky.
Canis Major Dwarf: Our nearest galaxy at 0.025 Mly
Others are named for their shape.
Cigar galaxy.
Comet galaxy.
Cartwheel galaxy.
Whirlpool galaxy.
See link for more information.
What stage follows the white dwarf stage of star development red giant prostar neutron black dwarf?
The Neutron stage follows the White Dwarf stage of star development.
What is the difference of a nebula and a supernova?
A nebula contains stars and other matter; a supernova is just a large enough nova, or star that explodes at the end of its life cycle due to spent fuel
How are the sun and a red dwarf similar?
Both the sun and a red dwarf are main sequence stars that produce heat and light by fusing hydrogen in their core and turning it into helium.
How is the sun and red dwarf different?
1. The sun is bigger then the red dwarf.2. The sun produces bright electric-like light unlike the red dwarfs dim elctric-like light.3. The sun is highly recognized in our solar system, but the red dwarf is not.
What are all of the elements found in the core of a star?
For stars on the main sequence, Hydrogen and helium.
What do you call the big explosion that ends the life of a massive star?
The name of the explosion that happens when a massive star dies is called a supernova (-novae, plural). Some stars that have an unusually energetic explosion or are extremely large stars that are subclassified as hypernova (-novae plual).
The reason this explosion only occurs with massive stars (At least 20 solar masses) is because larger stars, when they start to run out of fuel, begin fusing much heavier elements than the smaller star is capable of. The difference between the two is a white dwarf and a neutron star or gravitational singularity.
A star's core is extremely dense, so dense that the only way for a star to counterbalance it's own gravitational pull from collapsing the star into itself is to fuse helium. The star uses the helium to create pressure that causes enough outward pressure on the star that it balances out the star's own gravity.
When a large star is running out of fuel, it starts to collapse. However, this collapse causes the star to become hot enough to fuse the helium that built up in the core when it was young into carbon and oxygen. Once it starts running out of helium, it collapses a little bit again but now hot enough to fuse the carbon in the core into neon, then the neon into more oxygen and, then the oxygen into silicon and finally silicon into nickel which decays into iron. At this point the star is dead, the only thing preventing total collapse is electron degeneracy. If the star's Fe-Ni core is small, under 1.4 solar masses, it will be just a dead star that's hot enough to emit light and solar winds will blow away it's "atmosphere," forming a planetary nebula. This phase is called the red giant.
If the Fe-Ni core is over 1.4 solar masses, it will be too dense and collapses into itself. This collapse happens extremely quickly and when it's a few hundred kilometers in radius, it stops shrinking instantly due to electron degeneracy and all the matter it was taking with it is shot back like a shockwave, That is a supernova. Even denser results in a gravitational singularity with a large accretion disc of the star's remnant matter.
Is a white dwarf smaller than a red dwarf?
Yes, far smaller. A red dwarf is a whole star in and of itself. A white dwarf is the collapsed remnant of the core of a low-to medium mass star. A white dwarf may be about the size of Earth.
What is a neutron star left after a supernova explosion?
The name is a bit of a give away really. A neutron star is a lump of matter composed entirely of neutrons, thus containing a large mass (typically between 1.4 and 3.2 solar masses in a very small volume. This matter is so dense that typically one teaspoon of neutron star (5 ml) would have a mass of about 5 and a half billion tons.
What does nova and white dwarf mean?
A drying star that has collapsed to the size of the earth and is slowly cooling off; located are lower left of the H-R diagram.