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Nebulae
A nebula refers to an interstellar cloud of dust, helium gas, hydrogen gas, and other ionized gases in outer space. There are several types of nebulae categorized according to how they were formed.
410 Questions
Nebula means "Cloud" in Latin.
A nebula is an interstellar cloud of hydrogen, helium, plasma and dust. They are often called "stellar nurseries" because stars are "born" within them.
There are many types of Nebula, some stars have nebula's around them when they approach the final stages of their lives as in Wolf Rayet stars.
Diffuse nebula which are nebula which have no defining shape or boundary.
Dark nebula are so dense that it obscures the light from the background
(Such as the Horsehead Nebula),
or that it blocks out background stars
(Such as the Coalsack Nebula).
Reflection nebula are clouds of dust which are simply reflecting the light of a nearby star or stars. Such as the Witch Head Nebula.
Emission nebula is a cloud of ionized gas (plasma) emitting light of various colors. Such as the Eagle nebula.
Planetary nebula which forms from the shells of stars when they transform into white dwarfs. Such as the Cats Eye Nebula
Protoplanetary nebula which is formed from the rapid creation of a star via stellar evolution. Such as the Egg Nebula
Supernova remnants, the remains of a massive star when it explodes in a supernova explosion The resulting expanding shell of gas creates a diffuse nebula. Such as the Crab Nebula.
Are planetary nebulae sites for planet formation?
No, planetary nebulae are not sites for planet formation. Planetary nebulae are the outer layers of a dying star that have been expelled into space, while new planets form in protoplanetary disks around young stars.
In astronomy, diffuse nebulae is the general term for illuminated nebulae. The three types of diffuse nebulae are reflection nebulae, emission nebulae and supernova remnants. They are diffuse as opposed to the non-diffuse dark nebulae, i.e. the particles have spread out.
What is the difference between the Helix Nebula and the Ring Nebula?
The Helix Nebula is a planetary nebula located in the constellation Aquarius, while the Ring Nebula is a planetary nebula located in the constellation Lyra. The Helix Nebula appears more like a disk or helix shape, while the Ring Nebula appears as a ring or donut shape due to its orientation.
What is a cluster of tightly packed of older stars called?
A cluster of tightly packed older stars is called a globular cluster. These clusters can contain thousands to millions of stars, and are usually found in the outer regions of galaxies.
Why he2 exists only in discharge tubes?
He2 exists only in discharge tubes because it is an excited state of the helium atom that is created in the high-energy environment of discharge tubes. When electrical energy is passed through the tube, helium atoms are ionized and excited to create He2 molecules, which are unstable and quickly dissociate back into individual helium atoms.
How big is the helix nebula compared to earth?
The Helix Nebula is much larger than Earth. It spans about 2.5 light-years in diameter, while Earth's diameter is about 12,742 kilometers. This means the Helix Nebula is thousands of times larger than Earth.
How did the Omega Nebula get its name?
The Omega Nebula received its name due to its resemblance to the Greek letter omega when viewed through a telescope. Its shape appears to have a distinctive swirl pattern that resembles the letter omega.
What is the super nebula hypothesis?
The super nebula hypothesis proposes that massive stars can form in areas where the gas density is high enough to trigger the formation of multiple stars within a single giant molecular cloud complex. This hypothesis suggests that these super nebulas are responsible for the formation of massive star clusters seen in the universe.
Your question can not be answered exactly as it is asked. Many of the things in the universe come in various sizes. There are Galaxies and there are Super Galaxies. Super Galaxies can be bigger than clusters of galaxies. Planets and Moons come in all kinds of sizes. Some moons are the size of some minor and/or regular planets... such as Ganymede, and Titan for example. Both are larger than Mercury, and the minor planet Pluto. Pulsars are the remnants of a dying star, stars, meteors, and every thing you have asked about come in various sizes as well. I would recommend that you find and watch "The Universe" which I believe is on the Discovery Channel. There is an episode that deals with the largest things in the Universe. According to that source... the largest thing in the Universe is the "Cosmic Web". This show will deal with pretty much everything you have on your list. It is a very interesting show, and it repeats regularly.
Does a nebula have no light of its own?
It does not have visible light of its own, that lite is provided by the shine of the stars in it and or around it.
How long does it take for osteophytes to form?
Ostiophytes can be caused by many different problems in many different parts of the body. however they usually take some years to form and become a problem.
Bone spurs form due to the increase in a damaged joint's surface area. This is most commonly from the onset of arthritis. Bone spurs usually limit joint movement and typically cause pain.
Bone spurs form naturally on the back of spine as a person ages and are a sign of degeneration in the spine. In this case the spurs are not the source of back pains, but instead are the common symptom of a deeper problem. However, bone spurs on the spine can impinge on nerves that leave the spine for other parts of the body. This impingement can cause pain in both upper and lower limbs and a numbness or tingling sensations in the hands and feet due to the nerves supplying sensation to their dermatomes.
Spurs can also appear on the feet, either along toes or the heel, as well as on the hands. In extreme cases bone spurs have grown along a person's entire skeletal structure: along the knees, hips, shoulders, ribs, arms and ankles. Such cases are only exhibited with multiple exostoses.
Osteophytes on the fingers or toes are known as Heberden's nodes (if on the DIP joint) or Bouchard's nodes (if on the PIP joints).
Bone spurs may also be the end result of certain disease processes. Osteomyelitis, a bone infection, may leave the adjacent bone with a spur formation. Charcot foot, the neuropathic breakdown of the feet seen primarily in diabetics, will also leave bone spurs which may then become symptomatic.
Osteophyte formation has been classically related to any sequential and consequential changes in bone formation due to aging, degeneration, mechanical instability, and disease. Often osteophytes form in osteoarthritic joints due to damage and wear from inflammation. Calcification and new bone formation can also occur in response to mechanical damage in joints, or at the attachment points for ligaments and tendons.( this is an article sourced from Wikipedia)
How long does it take for crystals to form?
The time it takes for crystals to form can vary greatly depending on factors such as temperature, concentration of the solution, and type of crystal. In some cases, crystals can form within hours, while in other cases it may take days or even weeks. The process of crystal formation can be influenced by various factors that affect the rate of nucleation and crystal growth.
How long will take for form I 129 F to be processed?
It depends, today if it is a VSC (in Vermont ) is about 9 months, in California oficce is 6 months(CSV), but the I 130 takes a few days more!!!!!!!, it was designed to accelarate the process of uniting families!!!! JAJAJAJAJA1
Nebula are an accumulation of gas particles.
Bearing in mind that there untold billions of atoms in the cosmos.
Any two atoms have a gravitational attraction between them. they come together, thus attracting more gas particles by gravitational attraction.
These gas particles become so crowded that they begin to glow, (the nebula).
The analogy, is a dance hall/disco; maybe two people will statr to dance. Eventually a lot more people arrive on the dance floor, and it becomes hot and crowded.
Under further gravitational attraction these hot crowded gas particles keep accumulating into a hot glowing ball. Because partiucles are now so crowded nuclear fusion starts, and releases energy. Hence a Star/Sun.
Because this process takes billions of years we do not instantaneously see it going on.
NB All stars are nuclear reactors in space.
What two events can upset the balance between gravity and pressure in a nebula?
Two events that can upset the balance between gravity and pressure in a nebula are a supernova explosion or the collision of two nebulae. A supernova explosion releases an enormous amount of energy and can disrupt the delicate equilibrium between gravity and pressure. The collision of two nebulae can also disturb the balance by introducing additional gravitational forces and increasing the overall pressure within the system.
What two factors cause a nebula to develop into a star?
The two main factors that cause a nebula to develop into a star are gravity and heat. Gravity pulls the gas and dust in the nebula together, causing it to collapse under its own gravity. As the collapse continues, the temperature and pressure in the core of the collapsing nebula increase, eventually reaching a point where nuclear fusion ignites, and a star is born.
What does the nebula look like As the matter collapses and what does it do?
the nebula starts getting smaller, smaller and smaller and slowly dis a pears it then explodes and gives nutrients to the stars around it.
No. A neutron star is quite small, generally only a few miles across. A nebula is light years across.
What is a star called that a star left at the core of a planetary nebula?
The remnant star left at the core of a planetary nebula is called a white dwarf. After a star like the Sun exhausts its nuclear fuel, it expels its outer layers, forming a planetary nebula, while the hot core remains as a white dwarf. This stellar remnant is primarily composed of carbon and oxygen and gradually cools and dims over time.
