Which Best Describe the Shape and Massed of Galaxies

Current understanding holds that a galaxys type spiral elliptical or irregular _____. The appropriate answer is C.

Trappist 1 Planet Lineup Planets Orbital Period Our Solar System

The Hubble classification has proven to be immensely valuable to the study of galaxies.

. Hubble quickly realized that the vast majority of galaxies have only a small number of shapes. The first shape to be known was spiral because milky way is a spiral galaxy. The thin disk of our galaxy formed at the same time as the bulge.

A galaxy is a gravitationally bound system of stars stellar remnants interstellar gas dust and dark matter. Spirals are large rotating disks of stars and nebulae which are bounded by a shell of dark matter. Three types of galaxies are discussed below.

Spiral type C Sc galaxies are spiral galaxies that have a very small central bulge as well as narrow and well-defined central arms. Artists concept of the Milky Way galaxy with the galactic bar visible in the. Elliptical galaxies are almost egg-shaped.

This classification system is known as Hubble sequence and the four types are. A low mass galaxy that only has young stars but is making a lot of them. The stars and gas in almost all galaxies move much quicker than expected from the luminosity of the galaxies.

NGC 4321 which you see now is a type of Sc galaxy. The famous astronomer Edwin Hubble studied the galaxies for many years and found that there are four shapes in which the galaxies expand. And there are also galaxies that arent spirals or ovals.

The mass of the Galaxy can be determined by measuring the orbital velocities of stars and interstellar matter. Which of the following best describes the size shape and distance of the Andromeda Galaxy on the same scale. See answer 1 Best Answer.

The elliptical galaxys mass k velocity dispersion 2 the distance the stars are from the galaxy centerG where k is a factor that depends on the shape of the galaxy and the angle the galaxy is from Earth. They are generally round but can stretch longer along one axis than along the other so much so that some take on a cigar-like appearance. An elliptical galaxy looks like a partly flattened luminous sphere.

They have curved arms that make it look like a pinwheel. Key Concepts and Summary. Cut the pictures out.

And some galaxies are neither spiral nor elliptical they are irregular. However if you look at the scale on the plot the galaxies it contains only extend to a redshift of z 02 which is equivalent to a distance of about 750 Mpc. Collisions are commonplace in the universe and cause a lot of the irregular and misshaped galaxies.

The cloud of gas from which our galaxy formed was originally spheroidal in shape. Some galaxies are spiral-shaped like ours. Most galaxies if left undisturbed should form spiral galaxies and its thought that these galaxies will eventually form elliptical galaxies as they age.

A galaxy with a mix of old and new stars is making some new stars. Group the pictures using the classification explained by your teacher. Most of the mass of our galaxy is located at the galactic center in the form of a massive black hole.

These galaxies can be round nearly spherical or flattened disks. The word is derived from the Greek galaxias γαλαξίας literally milky a reference to the Milky Way galaxy that contains the Solar SystemGalaxies range in size from dwarfs with just a few hundred million 10 8 stars to giants with one hundred trillion 10 14 stars. Lenticular or Barred spiral.

A compact disk a few meters away. On the following pages there are actual pictures of different galaxies. Then the groups began combining to form clusters and eventually superclusters.

New stars are currently being born throughout the entire galaxy. The wave pattern spins like a propeller about the galactic center continually adding new stars into its pattern and leaving old ones behind. It is instead an odd sort of wave pattern that pulls and pushes large groups of stars into the shape of a candy bar.

In other words the galaxies in one direction are not distributed in exactly the same way as the galaxies in another direction. The stars in a spiral galaxy are concentrated in the central nucleus and in. The first attempts to map out our Galaxy were done by William Herschel.

Elliptical galaxies are shaped as their name suggests. They are the most familiar type in the universe. First a few galaxies came together to form groups much like our own Local Group.

Clusters of galaxies then formed as individual galaxies congregated drawn together by their mutual gravitational attraction Figure 4. Globular clusters formed before the gas from which our galaxy formed had time to collapse into a disk. Elliptical galaxies are generally smooth and oval.

A classification based on their optical appearance or morphology is limited to four fundamental types of galaxiesellipticals spirals irregulars and S0s. The Sun revolves completely around the galactic center in about 225 million years a galactic year. A large weirdly-shaped galaxy that has old stars but is also making lots of new ones.

Even though the shape of our Galaxy is still pretty fuzzily mapped weve made great strides in determining its appearance. Theyre called elliptical galaxies. Other galaxies are smooth and oval shaped.

Spiral galaxies look like pinwheel. They have irregular shapes and look like blobs. The universe is a very big place.

Our Milky Way is an example of a spiral galaxy. The three different types of galaxies are the Spiral galaxy the Elliptical galaxy and the Irregular galaxy. The first picture shows an elliptical galaxy.

The galaxies are usually classified on the basis of their shape. Spiral galaxies have the shape of a flattened disc with a small spherical nucleus bulging out of the centre. Most galaxies are spiral milky way elliptical lenticular and irregular shape.

Label the following diagram using the terms stars arms dust and nucleus. Both are formed by gravitational forces. They contain very little dust or gas and the stars contained here are.

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