Galaxies

Cepheid variables

The milky way. and if this is incorrect I'm sorry. and if it is right like my answer please?

Elliptical galaxies, Lenticular galaxies and Irregular galaxies.

There are elliptical, spirals, and irregulars. non of them are circular persay.

Yes, much bigger. There are many stars in our galaxy, thousands of millions of them. Everything you see in the night sky is in our galaxy, including the Moon, so the galaxy is much bigger.

there are as many galaxies as their is grains of sand all over earth and mars so it really does not matter but the answer:spiral but the least common is oval

The Large Magellanic Cloud is the larger of two irregular galaxies that orbit our own galaxy.

yes they can and if that happens the galaxy will be destroyes :)

There are about 400 billion stars in galaxies

The Milky Way Galaxy is located within the Local Group of the Virgo Supercluster.

See related link for a pictorial of our location (Red arrow)

Both - all galaxies contain young and old stars.

See related questions

It is the SOLAR SYSTEM where the Earth is part of it( A Solar System Consists of Planets, Moon, Stars like SUN, Asteroids, Meteors, Comets and sometimes Black Hole).Above the surface of the Milky Way, Millions and Billions of Cluster of Stars are Scattered around it. A Cluster of Stars are made up of Looking-Young Stars but, They are actually old since the Milky Way was formed around 12 Billion Yrs. old.

All of them. Any star you can see with the naked eye is within the Milky Way Galaxy.

Travelling at the speed of light, It would take about 2.5 million years. Travelling at conventional rocket speeds, it would take billions of years.

What you are looking at is just one spiral arm of the galaxy. The stars in it are so distant that they cannot be seen individually. Rather, their light melds together into a seemingly continuous haze.

There is not much solid information known about planets in other galaxies. Most planets discovered so far are in our own galaxy. This is because it is easier to discover a relatively near-by planet than one that is much farther away. However, the planets found so far make it likely that in our own Milky Way, and therefore other galaxies as well, have at least as many planets as stars.

There are usually 4 classifications:

Elliptical, spiral, (including barred spiral), lenticular, and irregular.

(However some classifications do have only 3 types.)

Considering the fact that a spiral galaxy is indeed a spiral, I will say no.

Definitely not. There are bigger stars in our Milky Way Galaxy. There is also suspected to be a Super Massive Black Hole in the middle of our galaxy too (which is way bigger). The Sun is a medium sized star.

I'm not sure of your question, but in astronomy, there is a "Local Group" of more than 20 galaxies to which the Milky Way belongs. About half are elliptical, with the remainder being of the spiral or irregular type. As in other clusters of galaxies, members are probably kept from separating by their mutual gravitational attraction. The Milky Way system is near one end of the volume of space occupied by the Local Group, and the great Andromeda galaxy (M31) is near the other end, about 2,000,000 light-years away.

If you know where Canis Major is, then you cannot miss Sirius. It is not only the brightest star in Canis Major, but the brightest in the night sky. Find Orion in the south, during the winter months in the northern hemisphere. Then find Orion's Belt, and follow its line of stars down to the left and you will find Sirius. It is unmistakeable. It is now April, but it is still visible in the early part of the night, but by next month it will be harder to see and won't be easily visible again until next winter.

Into Elliptical and Spiral galaxy.

Yes. There are two types of spiral galaxies: "S" (normal spiral) and the less common "SB" (barred spiral, with an elongated center).

All of them are.

Generally elliptical galaxies are the oldest.