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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
Diameter of the milky way in kilometers?
Ok you asked for it
Our Sun is 1,400 light years from the galactic center of the Milky-way now given that the sun and all of us here are on a trip around the Milky way for the next 220 million years it takes to do one cycle of the Milky-way and also the Milky way is on a trip which takes 50 million years to rotate, thus this answer is variable ( not, I am sure, that this matters in our daily lives)
This equates to 300,000 (the speed at which light travels in near kms) x 60 ( to make one minute) x60 ( to make the hour) x 24 ( to make the day) x 1400 (the distance of the sun to the galactic center) x 364.25 (to turn days into years) =132,179,040,000,000,000,000,000 kms from the galactic center or about 130 thousand billion billion kilometers
or 130 billion trillion kilometers
or 130 thousand million million million kilometers
or better still 1,400 light years
How many stars in the milky way galaxy have earth like planets?
It is estimated that there are billions of stars in the Milky Way galaxy that could potentially have Earth-like planets within their habitable zones. The exact number is difficult to determine with certainty due to the vastness of our galaxy and the limitations of current technology.
Why have no pictures been taken outside of the milky way galaxy?
We are inside the Milky Way galaxy, and so it is difficult to tell exactly what it looks like from the outside - because we aren't "outside."
Think of it like this: If you are inside your house and never went outside, you could still look out the windows and see other houses. But you wouldn't be able to SEE your house. You could figure it out, by drawing a diagram - but it isn't the same thing as seeing it from the outside.
From Earth, we see thousands upon thousands of stars. With big telescopes, we can also see other things between the stars, and some of those things are other galaxies.
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Some galaxies are hard to see because dense groupings of stars and nebulae in the Milky Way are in the way. But given that, we can see a dozen or so "satellite" galaxies of the Milky Way, and the next closest galaxies are those in the Andromeda group, some 2 million light-years away. This means that the light we see left Andromeda more than two million years ago. We are seeing them as they were that long ago. However, galaxies persist for billions of years, so they are likely very little changed from what they looked like then.
Who is better galaxy pegasis or lightnig l drago in beyblade?
It ultimately depends on personal preference and play style. Galaxy Pegasis is known for its speed and attack while Lightning L-Drago focuses on power and aggressive moves. Both have their strengths and weaknesses, so it's best to try both and see which one suits your playing style better.
To see the entire Milky Way galaxy and its two satellite galaxies, the Large Magellanic Cloud and the Small Magellanic Cloud, your field of view would need to be at least 100,000 light-years across. This distance is much larger than what is measurable in meters, as the Milky Way is estimated to be about 100,000-120,000 light-years in diameter.
Is milky way larger than Jupiter?
Yes. The Milky Way is a Galaxy which contains many many many solar systems. The stellar disk of the Milky Way galaxy is approximately 100,000 light years in diameter, and is believed to be, on average, about 1,000 light years thick. It is estimated to contain at least 200 billion stars and possibly up to 400 billion stars, the exact figure depending on the number of very low-mass stars, which is highly uncertain. Extending beyond the stellar disk is a much thicker disk of gas. Recent observations indicate that the gaseous disk of the Milky Way has a thickness of around 12,000 light years - twice the previously accepted value. As a guide to the relative physical scale of the Milky Way, if it were reduced to 130 km (80 mi) in diameter, the Solar System would be a mere 2 mm (0.08 inches) in width
Is local group larger than galaxy?
No, a galaxy is larger than a local group. A local group typically contains a small number of galaxies, while a galaxy is a massive collection of stars, gas, dust, and dark matter held together by gravity. Examples of local groups include the Local Group which contains the Milky Way and Andromeda galaxies.
What will happen if the red giant star explodes?
If a red giant star explodes, it can result in a supernova event where the star releases an enormous amount of energy and material into space. This explosion can lead to the formation of elements heavier than iron and can also result in the formation of a neutron star or a black hole, depending on the size of the star.
How fast is a galaxy 10 billion light years from earth moving away from us?
The Hubble Constant ... relating distance to speed of expansion ... is currently estimated
as 71 kilometers per second per megaparsec. (Plus or minus 10 percent. The number
has been hotly debated and actively researched for the past 80 years.)
1 parsec = 3.26 light years.
10 billion LY = 3,067.5 million parsecs (rounded)
Speed of recession = (3,067.5 million parsecs) x (71 kilometers per second per megaparsec) =
217,800 kilometers per second (rounded)
= 72.5 percent of the speed of light (rounded)
What constellation is the galaxy M74 in?
Difficult to say. There are no fixed markers in space, no road signs, nothing that everyone might agree on as the "starting point" for measurement. It appears - to US - that the Milky Way Galaxy is here, and almost everything else is moving away from us. (Curiously, the Andromeda Galaxy is coming CLOSER, and we expect Andromeda to collide with the Milky Way in about 4 billion years, more or less.)
People who live on planets orbiting stars in any other galaxy would see the same thing; their galaxy would be in the middle, and everything else would be moving away from THEM.
We're here, and all of our measurements are measured relative to the Earth, or our Sun, or our Galaxy. That's all we know.
How many planets are there in the triangulum galaxy?
We have no idea. Since the Triangulum galaxy is quite distant, we certainly cannot see any individual planets; we cannot even see individual STARS at that distance unless they are quite bright.
We can GUESS; for the nearby stars that we have studied using the Kepler Space Telescope, we seem to be averaging about one planet per star. The Triangulum Galaxy, M33, is somewhat smaller than the Milky Way or the Andromeda Galaxy, and Wikipedia estimates it at perhaps 40 billion stars, and estimate that is probably quite low. (We are discovering that there are far more of the small dim stars around than we had expected.) So a reasonable first approximation for the number of planets present there would probably be somewhere on the order of 100 billion.
But that's a GUESS.
What is the importance of variable stars in determining the size and shape of your Galaxy?
It's difficult to know exactly how far away a star is. We can't go there and measure it, for example. And different sized stars all have different brightnesses, so we can't always go by the brightness, either. Some bright stars are close; some bright stars are just bright, but far away.
There's a special class of stars called "Cephid Variables" whose brightness slowly changes. And we know (or at least, we THINK we know) that we can use the periodicity of the change to calculate the mass of the star - and if we know the mass, we know how bright the star really is. And if we know what its actual brightness is, we can measure the observed brightness, and figure out how far away the star must be.
How many quasars are in a galaxy?
Typically, a galaxy may contain one or a few quasars. Quasars are incredibly luminous objects powered by supermassive black holes at the centers of galaxies. They are rare and only occur under specific conditions, so it is not common for a galaxy to have multiple quasars.
Are constellations bigger than galaxies?
Contrary to popular belief, constellations are actually very spread out. They are not simply flat against the sky. Rather, the stars may be very different distances apart. The reason they all appear the same is because they are so far away that only a point of light makes it to the earth. With this in mind, it is very difficult to answer this question. The stars that we see with the naked eye are all within 1000 light years.
Who was the first astronomer to get a reasonable idea of the size and shape of the galaxy?
The first astronomer to propose a reasonable idea of the size and shape of the galaxy was Harlow Shapley in the early 20th century. He used the variable stars known as Cepheid variables to estimate the size of the Milky Way and its position within it. His work helped establish the notion of the galaxy as a vast, spiral-shaped structure.
When you see a galaxy 8 billion light-years away you are looking how many years into the past?
When you see a galaxy that is 8 billion light years away, the light that's dribbling into your eye
left that galaxy 8 billion years ago, and has been traveling toward you ever since then.
If you just happen to see the galaxy explode or turn blue while you're watching it, you'll know
that it actually exploded or turned blue 8 billion years ago.
Similarly, if the galaxy explodes or turns green tonight, you won't know about that for another
8 billion years from tonight.
Importance or usefulness of chemical composition?
Understanding the chemical composition of a substance is crucial for determining its properties, behavior, and potential uses. It provides insight into its reactivity, toxicity, stability, and compatibility with other substances, guiding decisions in fields like manufacturing, environmental protection, and healthcare. Ultimately, knowing the chemical composition helps in optimizing processes, designing new materials, and ensuring safety.
In what constellation is the center of the galaxy?
Not "the" quasar, but "a" quasar - there are many. A quasar is associated with a supermassive black hole, and those are generally at the center of galaxies.
The very fastest human-made spacecraft ever aren't out of this solar system yet, and they were launched in the 70s.
"Billions of years" is, if anything, an understatement.
Is there more galaxies in the world or more grains of sand on a beach?
in the world, there are zero galaxies, so the answer is grains of sand.
if your actual question was about the number of galaxies in the universe:
there are more galaxies in 1% of 1/10 of the visible sky than on all the beaches of all the worlds oceans
What population stars are found in a sprial galaxy?
Population I (High metal content) stars are generally found in the arms of spiral galaxies, whereas population II (Medium metal content) are generally found towards the centre of the galaxies.
How many players is Mario galaxy 2?
Super Mario galaxy 2 can be played as a 1 or 2 player game.
You can play with 2 players simply by plugging in another wii remote. When you play with 2 players, player 1 steers Mario, and the other a luma. The luma can stop enemies in their tracks and then spin to make them fall over. Player 2 can in addition pick up coins and starbits. Also if both players point at Mario at the same time and press the A button at the same time, he does a super jump.
What is the closest spiral galaxy to the Milky Way Galaxy?
The closest galaxy to our galaxy the Sagittarius galaxy but its Dwarf Galaxy, Andromeda is the Complete Galaxy and yet classified as the Galaxy which is closest to our galaxy. Facts : There are 12 Dwarf galaxies and 1 complete galaxy within the distance of 500,000 light years. Andromeda Galaxy is moving towards our galaxy at the speed 300,000 Kilometers per hour, but its so far that i would take millions of year to have a clash.
