What makes galaxies possible to exist?

What makes galaxies possible to exist?

One says that galaxies were born when vast clouds of gas and dust collapsed under their own gravitational pull, allowing stars to form. The other, which has gained strength in recent years, says the young universe contained many small “lumps” of matter, which clumped together to form galaxies.

What do other galaxies have in common with the Milky Way galaxy?

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. Other galaxies have elliptical shapes, and a few have unusual shapes like toothpicks or rings.

Are there galaxies within the Milky Way?

The Milky Way has several satellite galaxies and is part of the Local Group of galaxies, which form part of the Virgo Supercluster, which is itself a component of the Laniakea Supercluster. It is estimated to contain 100–400 billion stars and at least that number of planets.

How did we discover other galaxies?

In 1923 Hubble was studying the Andromeda “Nebula” (now called the Andromeda Galaxy), when he realised that one of the objects he was observing was in fact a Cepheid variable star. This finally ended the debate on the nature of the spiral nebulae – they were indeed distant galaxies like our Milky Way.

How does Milky Way formed?

In the simplest telling, it held that our Milky Way galaxy came together nearly 14 billion years ago when enormous clouds of gas and dust coalesced under the force of gravity. Over time, two structures emerged: first, a vast spherical “halo,” and later, a dense, bright disk.

What is the possibility of finding a similar system within the Milky Way Galaxy What about an Earth like planet?

As many as six billion Earth-like planets in our galaxy, according to new estimates. Summary: There may be as many as one Earth-like planet for every five Sun-like stars in the Milky Way Galaxy, according to new estimates.

Do galaxies orbit other galaxies?

Yes, they do. Locally, our Milky Way has nearly 60 dwarf satellites within a million l.y. The brightest and most famous of the are the Large and Small Clouds of Magellan.

Who discovered that there were other galaxies besides the Milky Way?

Edwin Hubble
1923 — Edwin Hubble resolves the Shapley–Curtis debate by finding Cepheids in the Andromeda Galaxy, definitively proving that there are other galaxies beyond the Milky Way.

What is the difference between the Milky Way galaxy and universe?

Most of the stars in our galaxy are thought to host their own families of planets. The Milky Way galaxy is just one of billion of galaxies in the universe, The universe is a vast expanse of space which contains all of everything in existence. The universe contains all of the galaxies, stars, and planets.

Do most stars in our galaxy have their own families?

Most of the stars in our galaxy are thought to host their own families of planets. The Milky Way galaxy is just one of billion of galaxies in the universe. The universe is a vast expanse of space which contains all of everything in existence. The universe contains all of the galaxies, stars, and planets.

Why can’t we take pictures of the Milky Way galaxy?

It’s more like trying to take a picture of the inside of your house while you are inside it, and while your house is cluttered with a bunch of junk to boot! Because we are inside the Milky Way, we don’t get to take any pictures of it from an angle “above” the Galaxy—for example, like this beautiful picture of M31, the Andromeda Galaxy.

Why can’t we see objects on the other side of galaxies?

For example, the optical picture has a bunch of dark dust clouds that almost completely block our view of anything within the galaxy. Luckily, these dust clouds are much more transparent to other types of light (for example, infrared and radio) so we can use these wavelengths to look at objects on the other side of the galaxy from us.