Galaxies

Yes

Yes. Some dwarf galaxies contain at least 1 billion stars.

All galaxies are massive clusters of stars scattered across the universe. Many galaxies take the same form, for instance, spiral and elliptical galaxies. Some galaxies also have a black hole in their center.

This is an excellent question!

All the heavier elements past hydrogen and helium (and traces of lithium, beryllium, and boron) are NOT as old as the universe. Instead they have been synthesized inside stars; it is energy from nuclear fusion of light elements into heavier ones that powers stars. Stars on the main sequence, like the Sun, take hydrogen and fuze it into helium; once the Sun has sun out of hydrogen in its core it will begin turning helium into carbon, nitrogen,and oxygen, and become a red giant.

Our sun will not evolve past burning helium into carbon, but higher-mass stars will continue to synthesize heavier and heavier elements, and explode as supernovae once they have converted a mass of more than 1.4 times the mass of the Sun into iron. Pull out a periodic table; the elements up to iron are made in stars, and release energy when they are made. Everything past iron costs energy to make, and so is only produced in supernovae, and in the neutron-capture reactions in a special type of red giant star called an asymptotic giant branch (AGB) star.

When a high-mass star explodes as a supernova, it throws most of its mass back in to interstellar space. The same is true of AGB stars, which puff off their outer layers, forming so-called planetary nebulae. In either case, there are heavy elements (metals) being put in the interstellar medium. New stars are formed out of the gravitational collapse of cold gas and dust clouds which are just regions of denser interstellar medium. So, the heavy elements made in old stars get recycled into new stars! We know that the material that makes up the Earth was once inside a massive star; our solar system is 'recycled' from several previous generations of massive stars. Old stars formed much earlier in our galaxy's history are made of material that hasn't been recycled through as many generations of stars, so these stars contain less metals. We call these old stars 'Population II" stars, while metal-rich stars like our Sun are "Population I". There is active research trying to find primordial "Population III" stars, which are first-generation stars that contain no material that has been through a supernova.

By they way, note that this means YOU are made out of stars! They hydrogen in you is from the beginning of the universe ~13 billion years ago, while the carbon, oxygen, nitrogen, calcium, phosphorous, potassium, etc. are all from the interior of long-dead stars.

The last one was last year. There will be one this year, and another one next year.

As the earth goes in a circle around the sun, at some point the earth, sun, and the center of the galaxy line up.

ore than a million. A galaxy with tens of millions of starts would be considered small. Out own galaxy has 200 billion to 400 billion stars. Some galaxies may contain more than 100 trillion stars.

The center of the elliptical galaxy is very dense with many stars, and density decreases farther out.

Both structures contain huge numbers of stars.

The Milky Way Galaxy has a mass of 5.8 × 10^11 solar masses.

Elliptical galaxies.

The same stellar materials and dust any other galaxy is made of - it just hasn't taken on a coherent shape - yet, or possibly it had a collision encounter with another galaxy, leaving it "irregular" - either is possible.

there is just more space no one has seen is before so no one knows what is beyond the galaxies.

hmm i think beyond the galaxies there are no spacetime so nothing exist but time doesn't ends so there is no end to space so there might be vacum beyond the galaxies.

there are 3 types of galaxies. 1.spiral 2.elliptical 3.irregular

the main galaxy in our universe would be a spiral galaxy

Galaxies are vast collections of stars. So I guess you could say that a big group of stars forms a galaxy. Our galaxy has many big clusters of stars within it, so not all star clusters are galaxies. If you have a cluster of several million or billion (or trillion) stars surrounded by a lot of empty space, that is probably a galaxy.

The milky way

To be bright you need to be hot, close or have a large surface area.

The brightest coolest stars are red super giants. They have such a large surface area, that even though their surface temperature is cool - in star terms - their large surface area makes them appear bright.

It's a barred spiral.

There's a supermassive black hole at its heart.

It's a cannibal.

You can only see 0.000003% percent of it

90% of it is invisible.

It has the same proportion as a stack of four DVDs

...sorry that's all i could find

who ever wrote this is stupid and don't got no brain get a life!!!!!!!!!

catch it with a master ball malamang seeds

The spiral galaxy's.

Canis Major Dwarf and Small Magellanic Cloud are irregular satellite galaxies of the Milky Way.
The two irregular galaxies that orbit the Milky Way are the Large and Small Magellanic Clouds.

The visible universe. I'm a bit of a space buff and to my knowledge there aren't any celestial

structures that are larger than a galaxy cluster. The only one I've come upon is the visible universe itself. I could be wrong about that but then again, I could be right. That tends to be how celestial questions like that one go. Hope this helps.

Answer 2:

Galaxy clusters are clusters of galaxies and therefore larger than individual galaxies. Superclusters are clusters of galaxy clusters and so are larger then galaxy clusters. Filaments are collections of superclusters and are the largest known structures in the universe.

The closest Galaxy to us (apart form the Milkyway in which we sit), is the The Canis Major Dwarf Galaxy (an irregular galaxy) located about 25,000 light-years away from our Solar System. Then there are the two satellite galaxies to ours, the large and small Magellanic Clouds. The LMC lies about 160,000 light years away and while the SMC is around 200,000 light years away.

After these comes the Andromeda Galaxy, which is a separate spiral galaxy approximately 2.5 million light-years from Earth.

Note, there may be some closer remnants of galaxies that the Milky Way has consumed that could be argued to be closer.