Where in the Milky Way would you most likely find a globular cluster?
Globular clusters orbit
in the halo of our galaxy
, centered on the galaxy’s center and expanding above and below the galactic disk. Open star clusters tend to orbit within the disk.
What is an ionization nebula quizlet?
What is an ionization nebula?
A colorful cloud of gas that glows because it is heated by light from nearby hot stars
.
Where does most star formation occur in the Milky Way galaxy?
Star formation occurs most rapidly in
the spiral arms
, where the density of interstellar matter is highest. The Galaxy captured (and still is capturing) additional stars and globular clusters from small galaxies that ventured too close to the Milky Way.
Where are most of the Milky Way globular cluster found quizlet?
open clusters contain up to several thousand stars and are found in the disk of the galaxy. Globular clusters contain thousands of stars, all closely packed together. They are found mainly in
the halo of the galaxy
.
What is ionization nebula?
What is an ionization nebula?
A colorful cloud of gas that glows because it is heated by light from nearby hot stars
.
Why are ionization nebulae found near hot massive stars?
Near hot stars we often find colorful, wispy blobs of glowing gas known as ionization nebulae. 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.
What is found almost exclusively in the disk of the Milky Way?
Schematic diagram of the Milky Way.
The O, B, and open cluster stars
are population I stars, and are found almost exclusively in the Galactic disk. The Galactic Bulge, Galactic Halo, and globular clusters are dominated by population II stars. A kiloparsec (kpc) is about 3,262 light years.
What type of galaxy is the Milky Way?
The Milky Way is a huge collection of stars, dust and gas. It’s called
a spiral galaxy
because if you could view it from the top or bottom, it would look like a spinning pinwheel. The Sun is located on one of the spiral arms, about 25,000 light-years away from the center of the galaxy.
What kinds of objects are found in the Milky Way disk?
The disk contains
all the gas and young stars
, although old stars are also found there. The bulge is dominated by old stars and a violent core. The halo contains very old stars and globular clusters. The reason for this separation of stellar types is a clue to how the Galaxy formed.
In which component of the Milky Way galaxy is the Sun located?
Bottom line: The sun is about 1/3 the distance from the center of the Milky Way galaxy to its outer edges. It’s located in a smaller spiral arm, between two large arms, called
the Orion Arm
.
Why do we see ionization nebulae the pink regions in the spiral arms of spiral galaxies see the image for an example?
Why do we see ionization nebulae (the pink regions) in the spiral arms of spiral galaxies? ...
They are in the center of their observable universe, with galaxies moving away from them.
Which telescope discovered these bubbles?
They’re called Fermi Bubbles becasue they were discovered in 2010 by
the Fermi Gamma-Ray Space Telescope
. These bubbles are enormous, extending a total of about 50,000 light years from the disk of the Milky Way, and they’re travelling at millions of miles per hour.
Why are the ionization nebulae so bright?
Why are the ionization nebulae so bright? They are
regions where gas is ionized by hot, young stars
. The gas in ionization nebulae is ionized by hot, young stars. ... A stands out in a photo of a galaxy because it shines brightly with light from massive young stars and glowing clouds of gas and dust.
Where in our galaxy are you likely to see the star formation?
The clouds and interstellar gas and dust. Where does most star formation occur in the Milky Way galaxy today?
In the spiral arms
.
Where in the galaxy would you expect to find Type I supernovae?
Since a white dwarf is involved, Type Ia supernovas are expected to be found among old star systems, such as globular clusters,
the central bulges of galaxies and elliptical galaxies
.
How are globular clusters distributed in our Milky Way galaxy?
How are globular clusters distributed in our Milky Way Galaxy?
Mostly in a large spherical halo surrounding the flat disk of the Galaxy
. ... Dust in the space between stars builds up over large distances and blocks the light of stars behind the dustier parts of the Milky Way.
Where would you expect to find globular clusters quizlet?
B. Globular star clusters is located
in the halo or bulge of a galaxy
and not in the spiral arms. they are old stars formed at the beginning of the universe.
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
.
How are emission nebulae produce?
Emission Nebula – An emission nebula is a cloud of high temperature gas. Within this type of nebula, a star energizes the atoms in the cloud with
ultraviolet radiation
. As these atoms fall back to lower energy states, they emit radiation. ... This causes the nebula to glow.
How are reflection nebulae formed?
A reflection nebula is created
when light from a star is scattered or reflected off a neighbouring dust cloud
. The scattered light is slightly polarised and has a spectrum similar to that of the illuminating star, only bluer.
What creates a bubble of hot ionized gas?
Bubbles of hot, ionized gas are created by
supernova explosions and powerful stellar winds
. As the bubbles expand, they create shock waves in the interstellar medium that drain away their energy. Eventually, the bubbles’ expansions slow and the bubbles merge with interstellar gas.
What evidence suggests that the Milky Way formed from the merger of smaller Protogalactic clouds?
What evidence suggests that the Milky Way formed from the merger of several smaller protogalactic clouds?
Stars belonging to different globular clusters in the halo differ in age and heavy element content
. This suggest that the Milky Way might not have formed from a single protogalactic cloud.
Which of these galaxies is most likely to be oldest?
|
Which of these galaxies is most likely to be oldest?
A galaxy observed at
a distance of 5 billion light-years
|
If earths orbital radius doubled in size, the parallax shifts of nearby stars would double in size
|
Does the sun orbit the center of the Milky Way?
Bottom line: The planets in our solar system orbit (revolve) around the sun, and
the sun orbits
(revolves) around the center of the Milky Way galaxy. We take about 225-250 million years to revolve once around the galaxy’s center.
Where in the Milky Way is the Sun located quizlet?
Where is the sun located? The sun is located in
one of the spiral arms of the Milky Way galaxy about three-fifths of the way from the centre to the edge of the galaxy
(p. 60).
Where is the Milky Way?
Our solar system sits in the disk,
about 27,000 light-years from the galactic center, near the inner rim of the Orion Arm
. Beyond the disk of the Milky Way is its halo, which is a spherical region with a radius of about 100,000 light-years.
Which kind of star is most likely to be found in the halo?
Old stars with few heavy elements are referred to as
population II stars
and are found in the halo and in globular clusters. Population I stars contain more heavy elements than globular cluster and halo stars, are typically younger and found in the disk, and are especially concentrated in the spiral arms.
What is the most common form of gas in the Milky Way?
Hydrogen
is the most abundant in the Milky Way galaxy and our solar system.
How do we know where we are in the Milky Way?
“There is no short answer to this question, because astronomers have followed many lines of evidence to determine the location of the solar system in the Milky Way. ... That observation indicates that our Milky Way Galaxy is a flattened disk of stars, with us
located somewhere near the plane of the disk
.
Is the Milky Way orbiting something?
No,
the Milky Way is not orbiting anything else
, such as the center of the universe, so it has no orbital period. The Milky Way is spinning like a frisbee as it heads out in a straight line from the Big Bang, which happened 14 billion years ago.
What makes the Milky Way Milky?
Our Sun (a star) and all the planets around it are part of a galaxy known as the Milky Way Galaxy. A galaxy is a large group of stars, gas, and dust bound together by gravity. ... Our galaxy is called the Milky Way
because it appears as a milky band of light in the sky when you see it in a really dark area
.
What’s outside of the Milky Way?
|
Common Name Alternative Name
|
Cygnus Arm Outer Arm
|
Where most of the dust and gas are located in the Milky Way?
At the centre of the Milky Way is what’s called
the Galactic Bulge
, a region densely packed with stars, dust and gas.
What are the three main regions of the Milky Way galaxy?
The Milky Way, like most spiral galaxies, can be separated into different regions:
the halo, bulge and disk
. Each of these regions is slightly different from the other two in where it is located, the kinds of objects it contains, and its shape. Halo: The halo surrounds the galaxy.
In what part of the galaxy are you most likely to find emission nebulae?
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.
Where are HII regions emission nebulae found?
Some of the most beautiful extended objects that we can see are HII regions, or diffuse or emission nebulae. So-named because they contain mostly ionized hydrogen (H+ or HII), HII regions are found
throughout the interstellar medium in the Galaxy and in other galaxies
.
Are planetary nebulae emission or absorption nebulae?
A planetary nebula (PN, plural PNe), is a
type of emission nebula
consisting of an expanding, glowing shell of ionized gas ejected from red giant stars late in their lives. The term “planetary nebula” is a misnomer because they are unrelated to planets.
