Why are ionization nebulae so bright?
These nebulae glow because ultraviolet photons from the hot stars can ionize the nebula's atoms or raise their electrons to high energy levels and the atoms emit light as the electrons return to lower energy levels.
Why do stars bob up and down as they orbit the galaxy?
Why do orbits of bulge stars bob up and down? They're stuck to the interstellar medium. Gravity of disk stars pulls toward disk. Halo stars knock them back into disk.
Where would you most likely find a nebula?
Where are nebulae? Nebulae exist in the space between the stars—also known as interstellar space. The closest known nebula to Earth is called the Helix Nebula. It is the remnant of a dying star—possibly one like the Sun.
Which part of the galaxy has gas with the hottest average temperature?
The authors also note that the hottest gas is located in clouds close to the very center of the Galaxy.
How is an ionization nebula produced?
An emission nebula is a nebula formed of ionized gases that emit light of various wavelengths. The most common source of ionization is high-energy ultraviolet photons emitted from a nearby hot star.
Is Orion an emission nebula?
One of the most famous emission nebulae is the Orion Nebula (M42) located just below Orion's belt. Another common type of emission nebula is a planetary nebula. These objects consist of a central white dwarf star surrounded by clouds of gas released as the original star evolved to the white dwarf phase.
Is the sun a disk or halo star?
Stars in the disk (the Sun, for instance) are fairly rich in heavy elements. This indicates that they are young stars, made from recycled gas into which planetary nebulae and supernovae have dumped heavy elements (carbon, oxygen, iron, and so forth).
What holds galaxies together?
Our galaxy, the Milky Way, is typical: it has hundreds of billions of stars, enough gas and dust to make billions more stars, and at least ten times as much dark matter as all the stars and gas put together. And it's all held together by gravity.
Where would you find an ionization nebula?
ionization nebulae are colorful, wispy blobs of gas found near hot star. they require the hot stars' ultraviolet light to raise the electrons in the atoms of the gas to high energy levels or to ionize the atoms completely.
Are we inside a nebula?
0:383:24What If Earth Was Inside of a Nebula? – YouTubeYouTube
Is Mars colder than Earth?
Today, Mars is warmer than Earth. See how we compare. National Air and Space Museum.
How cold is Mars?
about -81 degrees F. Temperatures on Mars average about -81 degrees F. However, temperatures range from around -220 degrees F. in the wintertime at the poles, to +70 degrees F. over the lower latitudes in the summer.
What are the 4 main types of nebulae?
These are emission nebulae, reflection nebulae, dark nebulae, planetary nebulae, and supernova remnants. Emission and reflection nebulae tend to be fuzzy in appearance and lack any noticeable shape or structure. They are also known as diffuse nebulae.
Is the Crab nebula A emission nebula?
The Crab Nebula was the first astrophysical object confirmed to emit gamma rays in the very-high-energy (VHE) band above 100 GeV in energy.
What is the name of the black hole at the heart of the Milky Way?
The black hole is often referred to as Sgr A*, pronounced sadge ay star. Its mass is about 4 million times that of the sun, and it's about 27,000 light years from Earth, according to MIT.
Why is the Milky Way Blue?
The disk of our galaxy appears blue because it has a large proportion of young, hot O and B main sequence stars. The disk contains gas and dust from which stars can form.
Is there a black hole in every galaxy?
Black holes are a class of astronomical objects that have undergone gravitational collapse, leaving behind spheroidal regions of space from which nothing can escape, not even light. Observational evidence indicates that almost every large galaxy has a supermassive black hole at its center.
Is there a black hole in the center of our galaxy?
Sagittarius A* is a massive black hole at the center of the Milky Way. Now that astronomers have imaged it, they can begin to learn more about black holes within other galaxies across the universe. This image shows Sagittarius A*, the black hole at the center of the Milky Way galaxy.
Why are ionization nebulae found near hot massive stars?
what are ionization nebulae, and why are they found near hot, massive stars? ionization nebulae are colorful, wispy blobs of gas found near hot star. they require the hot stars' ultraviolet light to raise the electrons in the atoms of the gas to high energy levels or to ionize the atoms completely.
What is the most likely place to find ionization nebulae star forming regions )?
Where are the ionization nebulae predominantly located in the galaxy M51? within or on the edges of the spiral arms of the galaxy (Like the dust clouds, ionization nebulae are located primarily within or on the edges of spiral arms. This is because spiral arms are regions of active star formation.
Can you fly through a nebula?
We're not going to fly through a nebula, not in the lifetimes of anyone alive today. Possibly not ever in anyone's lifetime. But based on data from the Hubble and Spitzer telescopes, we now have a feel for what it may be like to fly through one of the most famous ones – the Orion nebula.
What is a dying star called?
When a high-mass star has no hydrogen left to burn, it expands and becomes a red supergiant. While most stars quietly fade away, the supergiants destroy themselves in a huge explosion, called a supernova.
Does it rain on Mars?
Because of Mars' very low atmospheric pressure, any water that tried to exist on the surface would quickly boil away. atmosphere as well as around mountain peaks. No precipitation falls however.
Does it snow on Mars?
Scientists have already observed snowfall several times on Mars. With an average temperature of about minus 80 degrees Fahrenheit (minus 60 degrees Celsius), the nearby planet is certainly cold enough for snow.
What is the coldest Earth has ever gotten?
minus 128 degrees Fahrenheit The lowest air temperature ever measured by a weather station, minus 89 degrees Celsius (minus 128 degrees Fahrenheit), was recorded there at Russia's Vostok Station in July 1983.
Is the Milky Way a nebula?
The Orion Nebula (M42), is one of the most photographed celestial objects, being one of the brightest nebulae that is even visible to the naked eye. It is located within our Milky Way galaxy, like the Helix Nebula, but is about double the distance away and is about 4 times the size.
What are the 2 types of nebula?
On the basis of appearance, nebulae can be divided into two broad classes: dark nebulae and bright nebulae. Dark nebulae appear as irregularly shaped black patches in the sky and blot out the light of the stars that lie beyond them.
What is the difference between a dark nebula and an emission nebula?
Reflection Nebula – A reflection nebula differs from an emission nebula in that it does not emit radiation of its own. It is a cloud of dust and gas that reflects the light energy from a nearby star or group of stars. They usually tend to be blue in color because of the way that the light is scattered.
What’s the difference between emission nebulae and reflection nebulae?
An emission nebula is a cloud of ionized gas. The most common source for ionizations are high energy photons emitted from a nearby star. These can be among some of the most colorful objects in the sky. Reflection Nebulae are clouds of dust which are simply reflecting the light of a nearby star or stars.
Can a wormhole exist?
In the early days of research on black holes, before they even had that name, physicists did not yet know if these bizarre objects existed in the real world.