What is the Milky Way classified as?

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. They come in a variety of shapes and sizes. The Milky Way is a large barred spiral galaxy.

What is a galaxy and how is it classified as?

Licensed for NEALS. A galaxy is a massive conglomeration of. stars, stellar remnants, interstellar gases, dust and dark matter, held together by gravitational forces. There are probably more than 170 billion (1.7 × 1011) galaxies in the observable Universe.

What can galaxies be classified as?

Astronomers classify galaxies into three major categories: elliptical, spiral and irregular. These galaxies span a wide range of sizes, from dwarf galaxies containing as few as 100 million stars to giant galaxies with more than a trillion stars.

What type of galaxy are the Milky Way and the Andromeda classified into?

spiral galaxies

A good example of this type is the Andromeda galaxy. Around two-thirds of all spiral galaxies have a bar-like structure – thus they are classified as barred spiral galaxies. Our galaxy, the Milky Way is an example of this type of galaxy. The rarest type of galaxies is the elliptical double-ringed galaxy.

What is the classification of the Milky Way galaxy quizlet?

How might the Milky Way galaxy be classified? Why is it’s classifica uncertain? It’s a spiral galaxy.

What is the Hubble classification of the Milky Way galaxy?

Our own Milky Way is generally classed as Sc or SBc, making it a barred spiral with well-defined arms.

What are the two classifications for spiral galaxies and how do they differ?

Spiral galaxies are further classified by how tightly their spiral arms are wound. A galaxy with very tightly wound arms, such the left galaxy in the list above, would be called “type a.” galaxy A “type b” galaxy has more loosely wound arms. A “type c” galaxy (such as the middle one above) has very loosely wound arms.

What is the classification for a spiral galaxy with a large nuclear region and tightly wound arms?

Both the arms and the disk of a spiral system are blue in color, whereas its central areas are red like an elliptical galaxy. The Hubble sequence classifies spirals on the amount of winding in their spiral arms, tightly wound spirals are type Sa, more open spirals are classed Sc.

What is the classification for a spiral galaxy with a large nuclear region and tightly wound arms quizlet?

12- Spiral galaxies are classified in terms of increasing tightness of their spiral arms as types Sa, Sb, and Sc. However, many spiral galaxies are aligned edge-on to Earth and their spiral arms cannot be seen.

Is the Milky Way an active galaxy?

Our Milky Way galaxy has one of these supermassive black holes at its center, but our galaxy is not an active one. Active galaxies require that gas and dust are in the act of falling into the black hole and glowing brightly on the way in.

What is the Hubble classification for a spiral galaxy with a small nuclear bulge and wide loosely wound spiral arms?

Type Sa (early) spiral galaxies have prominent bulges (bulge to disk luminosity ~0.3), tightly wound arms (pitch angle ~ 0.6), and the stars in the spiral arms are distributed very smoothly.

How did Edwin Hubble classify spiral galaxies quizlet?

Terms in this set (32) Edwin Hubble classify according to the texture of their spiral arms and the relative size of their central bulges. – Sa galaxies have smooth, broad spiral arms and the largest central bulges. – Hubble classified barred spirals according to the texture of their spiral arms.

Is Earth in the Milky Way?

Our solar system—which includes the sun, Earth, and seven other planets—is part of this galaxy, called … you guessed it … the Milky Way. The Milky Way contains hundreds of billions of stars like our sun.

What is the largest galaxy in the universe?

IC 1101

The biggest known galaxy, first described in a 1990 study from the journal Science, is IC 1101, which stretches as wide as 4 million light-years across, according to NASA. Galaxies are often bound to each other gravitationally in groups that are called galaxy clusters.

Is black hole in Milky Way?

It’s now well known that supermassive black holes are common in the centers of galaxies, including our own Milky Way. They have millions or billions of times our sun’s mass.

Can a wormhole exist?

Einstein’s theory of general relativity mathematically predicts the existence of wormholes, but none have been discovered to date. A negative mass wormhole might be spotted by the way its gravity affects light that passes by.

What is a white hole in space?

White holes are theoretical cosmic regions that function in the opposite way to black holes. Just as nothing can escape a black hole, nothing can enter a white hole. White holes were long thought to be a figment of general relativity born from the same equations as their collapsed star brethren, black holes.

What did Einstein think of black holes?

Black holes are regions of spacetime where gravity’s pull is so strong that nothing, not even light, can escape from being dragged in and “eaten.” Einstein’s theory of general relativity predicted the existence of black holes and that, no matter what such an object “eats,” black holes are characterized only by their …

Could a white hole exist?

White holes cannot exist, since they violate the second law of thermodynamics. General Relativity is time symmetric. It does not know about the second law of thermodynamics, and it does not know about which way cause and effect go.

Which is the nearest black hole to Earth?

In 2020, a team of astronomers with the European Southern Observatory (ESO) discovered the closest black hole to Earth in the HR 6819 system, just 1,000 light-years away, only to have other scientists dispute the findings.

What is the largest known black hole?

They can fit multiple solar systems inside of them. Ton 618, the largest ultramassive black hole, appears at the very end of the video, which, at 66 billion times the mass of the Sun, is going to weigh very heavily on how we daydream about the cosmos moving forward.

What is on the other side of a Blackhole?

The discovery of light from the other side of a black hole was predicted by Einstein’s theory of general relativity. But it has never actually happened before, and the discovery marks the first time that light has ever been directly observed coming from behind a black hole.

How big would the Earth be if it was a black hole?

After just a few minutes more — 21 to 22 minutes total — the entire mass of the Earth would have collapsed into a black hole just 1.75 centimeters (0.69”) in diameter: the inevitable result of an Earth’s mass worth of material collapsing into a black hole.