Galaxies

There is no such thing as a "130 light-year galaxy". A typical galaxy has a diameter of 100,000 light-years (dwarf galaxies can be somewhat smaller); the nearest dwarf galaxy is at a distance of perhaps 100,000 light-years.

If another object (say, a star) is at a distance of 130 light-years, that means that light takes 130 years to travel from here to there, or from there to here.

There is no such thing as a "130 light-year galaxy". A typical galaxy has a diameter of 100,000 light-years (dwarf galaxies can be somewhat smaller); the nearest dwarf galaxy is at a distance of perhaps 100,000 light-years.

If another object (say, a star) is at a distance of 130 light-years, that means that light takes 130 years to travel from here to there, or from there to here.

There is no such thing as a "130 light-year galaxy". A typical galaxy has a diameter of 100,000 light-years (dwarf galaxies can be somewhat smaller); the nearest dwarf galaxy is at a distance of perhaps 100,000 light-years.

If another object (say, a star) is at a distance of 130 light-years, that means that light takes 130 years to travel from here to there, or from there to here.

There is no such thing as a "130 light-year galaxy". A typical galaxy has a diameter of 100,000 light-years (dwarf galaxies can be somewhat smaller); the nearest dwarf galaxy is at a distance of perhaps 100,000 light-years.

If another object (say, a star) is at a distance of 130 light-years, that means that light takes 130 years to travel from here to there, or from there to here.

Every year the earth orbits the sun in the same plane as the galactic disk so it is closer to the galactic center by the diameter of the earth's orbit late June- July than it is in January when the sun is between the earth and the galactic center.

That is also the time the earth is 5 million miles further from the sun (perhaps because it is the gravity from the galaxy that is distorting the orbit). One can not argue that the gravity of the galaxy is not keeping the solar system and all the othe stars in orbit around it! I would like to calculate what that gravitational force must be to balance the solar systems centripetal force acting to fling it outward.

The Earth is closest to the center of the galaxy late June. We are perhaps not coincidentally both 5 million miles further away from the sun at that time, and at the same time we are on the side of the orbit that faces the galactic center. is it perhaps the gravity of the galaxy that is pulling on our earths orbit as well, making it slightly elliptic?

The size of our orbit is less than one billionth the distance to the center of the galaxy, so comparatively we really aren't much closer.

My astrophysicists friends say that we are too far from the center of the galaxy for it's gravity to have any significant influence upon us, although it is evident that the gravitational forces are strong enough to keep us and all the other stars in orbit around it.

We have no idea of what still unknown other forces and energies might be emitted as the super black hole at the galaxies center as it slowly consumes the surrounding galaxy sucking the surrounding stars down the super massive black hole as the rest of the galaxy slowly turn about in the same way water turns as it's going down the drain pipe.

The earths not quite circular orbit around the sun is in the same plane as galactic orbit.

If any gravity or other influence from this super massive black hole and the combined mass of the rest of the galaxy arrives as far as we are, this field might vary when the sun and the galactic center are together overhead in January compared to when the sun and the galactic center are on opposite sides of us in late June early July.

By coincidence, that the sun opposes the galactic center at around the same time the as the summer solstice, when the Northern Hemisphere is tipped toward the sun during the end of June. Therefore the Southern Hemisphere would be tilted toward the collect the center.

Summer solstice

This puts the galactic center square overhead and the sun behind us once a year for a few days around the June 23 solstace, at midnight, 0000hours, anywhere near the tropic of Capricorn (23.5 deg South) This latitude includes South Africa, Australia and Argentina. If there were to be any attempt to look for any galactic gravitational or 'radiation' variation, from a terrestrial viewpoint, this would be the best time and the best locations for observation.

Most galaxies are known to us only by index numbers assigned by astronomers, and a great number of the newly-discovered ones don't even have numbers yet. One of the earliest lists including galaxies were developed by the French astronomer Messier. Messier was primarily a comet-hunter; he wasn't much interested in things that weren't comets, but he kept re-discovering the same comet-like objects in his telescope. So he compiled an index of "comet-like things that aren't comets". The 31st item in Messier's list, called (unimaginatively enough) "M31", is what we now call the Andromeda galaxy, or sometimes the "Great Nebula in Andromeda".

Some of the not-too-far-distant ones have interesting names suggested by their shape or appearance; for example, M104, the Sombrero Galaxy, or M82, the Cigar Galaxy.

Our galaxy is the Milky way. Andromeda is the nearest galaxy to our milky way.

Another word for milky is cream. You could said it was milk like or it had the texture of milk.

• M32 - Dwarf
• M49
• M59
• M60 (NGC 4649)
• M87 (NGC 4486) - Supergiant
• M89
• M105 (NGC 3379)
• Maffei 1, the closest giant elliptical galaxy.

Sun

The NGC 5247 galaxy is a spiral galaxy 60 million light-years from Earth in the Virgo constellation, and is 100,000 light-years in diameter (same size as the Milky Way), and contains about 100 billion stars (same number of stars as the Milky Way). It emitted its light 60 million years ago when the universe was nearly 14 billion years old.

Click the desired player, select 'trade', click. Then select the desired items from your inventory.

All galaxies have a dense core of stars. Spiral galaxies, however, have arms that are often visible. There are two kinds of spiral galaxies: barred, where there appears to be a line running from arm to arm through the core, and ordinary, where there is no bar.

spiral barred is SB dont know what bc stands for

I know where it is. You have to get all the way to the top of the tower. On the way up, I swear my life you will hear the twinkling sound of a gold star which is hidden. ENJOY!

Spiral galaxies tend to have concentrations of heavier elements. This is because the spiral arms are "density waves" that sweep through the galaxy, disturbing gaseous nebula and fostering active star formation. As stars age, they create heavier elements (anything more complex than hydrogen and helium) and as the die they spread them around, to be used in the next generation.

Elliptical galaxies have star formation, but not nearly as active as spiral galaxies. As such they have much more basic compositions, almost entirely hydrogen and helium.

Yes. See related question.

It is a 'sister' galaxy, visible with the naked eye. Very similar to our own and part of the local group.

No, it has no atmosphere.

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Hope this helped!

Most galaxies, even our own, are found in groups or clusters. For example, the Local Group contains several galaxies including the Milky Way, Andromeda, and the Magellanic clouds.

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Its mass - the larger its mass the shorter its life.

The smallest and least massive stars can last for trillions of years, whereas a massive star may end its life in millions of years.

1924

Because it IS a supernova remnant.

It's the visial remains of a star that expolded and was seen in 1054. Designated SN 1054.

A galaxy is made up of many, many things - some incredibly hot and some incredibly cold. A galaxy cannot be "hot or cold" - it is not simply one thing....

Spiral galaxies look like flat white disks with yellowish bulges at the center and disks filled with cool gas and dust, interspersed with hotter ionized gas and usually display beautiful spiral arms