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Galaxies

Galaxies are large systems of stars and interstellar matter, and they contain billions of stars. Our own galaxy, the Milky Way, has 200 to 400 billion stars, and there are over one billion known galaxies. Questions that have to do with galaxies in general and specific galaxies are perfect for this category!

2,392 Questions

Why does a planet's distance from the sun affect the solar radiation a planet receives?

The further one is from the sun the less radiation is received, according to an inverse square root law.

This means that if you increase your distance by 2 the solar radiation will decrease by 2.

if you increase your distance by 3 the solar radiation will decrease by 9

and so forth.

What happens if you go close to a milky way?

If you were to get close to the Milky Way galaxy, you would continue to see more stars and gas clouds as you approach it. Ultimately, you would not be in any danger as the Milky Way is a collection of stars, gas, and dust held together by gravity.

What do the constellations look like?

There are 88 different constellations, each looks different. Basically, what you see is a group of stars.

There are 88 different constellations, each looks different. Basically, what you see is a group of stars.

There are 88 different constellations, each looks different. Basically, what you see is a group of stars.

There are 88 different constellations, each looks different. Basically, what you see is a group of stars.

Which galaxy is bigger a elliptical or irregular?

Elliptical galaxies are typically larger than irregular galaxies. Elliptical galaxies are shaped like ellipsoids and often contain more stars and stellar mass compared to irregular galaxies, which have a more irregular and chaotic shape and structure.

What does the point on the point star mean?

The point on a star typically symbolizes inspiration, guidance, or direction. It can also represent a goal or aspiration to strive towards. In some contexts, it may signify achievement, success, or excellence.

If you cant observe the milkyway directly how do you know its structure and shape?

Scientists study the Milky Way using various methods, such as radio waves, infrared, and X-ray observations as well as mapping the distribution of stars and gas clouds. By combining data from these different techniques, they can infer the structure and shape of the Milky Way, including its spiral arms, central bulge, and disk. These methods allow scientists to build a comprehensive understanding of our galaxy.

Closet galaxy to the milky way galaxy?

The nearest known is the very small Canis Major Dwarf Galaxy at 25,000 light years, a 'satellite' galaxy that orbits the Milky Way. This was only discovered in 2003, so there may be an unknown small galaxy closer.

If you want the closest galaxy that is not a Milky Way satellite, that seems to be NGC 185 at just over 2 million light years, though this is in turn a satellite of the Andromeda Galaxy (M31).

Finally, M31 is the nearest galaxy that is anything like the Milky Way, a large spiral with its own satellites. It's about 2.5 million light years away.

What is the nearest galexy?

The nearest major galaxy is Andromeda which is only 2.5 million light years away. There are two dwarf galaxies near the Milky Way called the Large Magellanic Cloud and the Small Magellanic Cloud roughly 75,000 light years away.

In about 2.5 billion years, Andromeda and the Milky Way will merge.

Is the Black Eye galaxy moving toward away or neither from Earth?

The Black Eye Galaxy [See Link] has a redshift of 0.001361, so it is moving away from us. Currently at 24 million light years from Earth

What is the advantage and disadvantage of a buzzer?

Advantages: * Electrically operated device that is good for drawing attention to a condition that requires attention. Disadvantages: * Annoying sound to those that don't know its significance. * Requires training to know what the buzzer means, and how to repair the condition without just shutting off the buzzer. * Could trigger a fire in an explosive atmosphere. * Most likely device to receive "emotional outbursts" like misguided forklift strikes, stray bullets, and attacks by roving wire cutters.

If the other suns stars in your galaxy have names does our sun have a name or is it just sun?

Names have been assigned to celestial bodies by astronomers and others. That does not mean that every celestial body has been given its own name. The Sun is what we call the body that Earth revolves around. That name is not usually gtiven to any other celestial body.

What are some physical characteristics of elliptical galaxies?

Elliptical galaxies are generally round or oval in shape, lacking the distinctive spiral arms seen in spiral galaxies. They typically have a smooth and featureless appearance, with older star populations and little ongoing star formation. Elliptical galaxies also tend to be more massive and contain mainly older stars.

Compare and contrast the three types of galaxies?

Galaxies that appear to have a bulge in the middle and arms that spherical outward, like pinwheels, are spherical. Elliptical galaxies look like round or flattened balls. Galaxies that do not have regular shapes are known as irregular galaxies.

True or false a quasar is a type of globular cluster?

False. A quasar is not a type of globular cluster. Quasars are extremely energetic and remote celestial objects powered by supermassive black holes, while globular clusters are tightly bound groups of stars that orbit galaxies.

Are there two blackholes in the center of milky way galaxy?

To understand the 'how' of the presence of a supermassive black hole believed to be in the center of the Milky Way, one would need to know of the mechanism of its origin, which is tied to the origin of the galaxy itself. If sufficient matter is present in a given location, gravitational forces cause the matter to 'clump' and if sufficiently strong, it will continue to accrete and gain in mass; above a certain mass, given favorable conditions, a black hole will form. This is believed to have happened during the formation of our galaxy. In the case of the black hole at the galactic center, calculations indicate it has managed to acquire over four million solar masses.

If the sun were the size of a grapefruit how big would the milky way galaxy be?

Well if the sun were the size of a grapefruit we would not have anything in this solar system to compare it to, so lets make the sun the size of a grain of sand (2mm), the milky way would then be the size of our Sun, which is just over 109 the size of earth... however we are basing this off width, being that the Milky Way is disk shaped.

What slows down gravity?

Yes. Objects deeper in a gravity well see things further away as moving faster; likewise, objects far away see objects deep in the well moving more slowly.

This has real consequences here on Earth: a plane flying high in the sky is in a shallower region of Earth's gravitational well, while a ground station is deeper. We can place perfectly synchoronized clocks on the station and on the plane, and send the plane round the world, and actually see that the clocks have shifted out of sync.

What is the diameter of the local group?

The diameter of the local group, which is a cluster of galaxies that includes the Milky Way, is estimated to be around 10 million light-years. This means that from one end of the local group to the other, it spans a distance of approximately 10 million light-years.

The more spectral lines of a star are shifted to the red end of the spectrum the?

The more spectral lines of a star are shifted to the red end of the spectrum, the more it indicates that the star is moving away from us. This phenomenon is known as redshift, and it is a result of the Doppler effect caused by the expansion of the universe.

What is intergalactic space?

We know that "inter" is used to mean between and "galactic" is used to mean something about galaxies.

It is common to apply the term "intergalactic space" to refer to the space between galaxies. Scientists once thought that space between the galaxies would be empty indeed, without the dust and trace gasses that exist between the planets. Now scientists aren't so sure.

What is in the center of the milkey way?

We cannot see the center of the Milky Way Galaxy because of the dense clouds of dust and gas in the way, but there are interesting indications that our galaxy, like many large galaxies, may contain a supermassive black hole in its center.

Where is the star Kochab located on the little dipper?

The star Polaris is at the tip of the handle of the little dipper or Ursa Minor. Kochab is at the end of the ladle.