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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
Do scientists still explore the Milky Way Galaxy and find new things?
Most of the observation astronomers make are inside our Galaxy. Of course we still find new things. The Milky Way is a very complex and diverse collection of celestial objects. We still have much to learn!
What is the name of the local cluster earth belongs to?
Earth belongs to the Milky Way Galaxy, which belongs to the The Local Group, which is part of the Virgo Super Cluster
What galaxy and star system is closest to the US?
You might as well say, closest to the Earth, or to the Solar System - since distances within the Solar System are insignificant compared to the distances to other star systems.
The closest star system is Toliman, also known as Rigil Kentaurus, or Alpha Centauri.
The closest known galaxy is a dwarf galaxy, the Canis Maior Dwarf Galaxy - a satellite of our galaxy.
You might as well say, closest to the Earth, or to the Solar System - since distances within the Solar System are insignificant compared to the distances to other star systems.
The closest star system is Toliman, also known as Rigil Kentaurus, or Alpha Centauri.
The closest known galaxy is a dwarf galaxy, the Canis Maior Dwarf Galaxy - a satellite of our galaxy.
You might as well say, closest to the Earth, or to the Solar System - since distances within the Solar System are insignificant compared to the distances to other star systems.
The closest star system is Toliman, also known as Rigil Kentaurus, or Alpha Centauri.
The closest known galaxy is a dwarf galaxy, the Canis Maior Dwarf Galaxy - a satellite of our galaxy.
You might as well say, closest to the Earth, or to the Solar System - since distances within the Solar System are insignificant compared to the distances to other star systems.
The closest star system is Toliman, also known as Rigil Kentaurus, or Alpha Centauri.
The closest known galaxy is a dwarf galaxy, the Canis Maior Dwarf Galaxy - a satellite of our galaxy.
What color is the dwarf galaxy?
Hard to say. A blue dwarf star is theoretically what a red dwarf with 0.25 solar masses will become, but the universe is not currently old enough to form any, so no one knows for sure, but considering a star is blue because it is hotter than the others, and when a red dwarf turns into one it would increase its surface temperature, I would say it would be blue or a bluish-white.
Where in the milky way galaxy is castor star found?
Present estimates of the dimensions of the Milky Way galaxy place its diameter at roughly 100,000 light years.
The star "Castor" in the constellation of Gemini is about 50 light years distant from our solar system,
or roughly 0.05 percent of the distance across the galaxy.
Castor is closer to us than your average next-door neighbor.
What is significant about the Milky Way galaxy?
For several decades, astronomers believed that the Milky Way galaxy was a spiral galaxy similar to M31 in Andromeda. But recent observations indicate that the Milky Way may actually be a "barred spiral" galaxy.
In either event, the Sun and our solar system are about 2/3 of the way out on one of the spiral arms, a very long way from the center of the Milky Way. Which is probably just as well, as recent research indicates that many galaxies including ours may have supermassive black holes at the center. So anywhere near the center of the galaxy would probably be a very nasty place to be!
How far away is Canis Major Dwarf in light years?
VY Canis Majoris has a radius about 2,100 times that of the Sun.
This means that about 9 billion Suns could fit inside it.
See related link for a picture of the difference in size.
What is the shape and structure of a meteor in space?
Technically, a "meteor" is the streak of light caused by a space rock fallingthroughthe atmosphere and being heated to incandescence by friction and compression. So there are no meteors in space.
You're probably wondering about a "meteoroid", which is a space rock drifting through space, which would become a meteor if it ever hits the atmosphere. We don't know, because we've never had a chance to examine one close-up in space. But we expect that they would all be different, depending on how and where they were formed - or were blasted apart by the collision of other larger space rocks.
Where can young metal-rich stars be found in the milky way?
The so-called "Population I" stars are found in the galactic suburbs, which is where we live. Population II stars are concentrated toward the galactic bulge.
What is a galaxy that has a pinwheel shape?
A Spiral Galaxy or a Barred Spiral. These are two of the main types of Galaxies.
Who discovered the pinwheel galaxy?
Do you want the name of a specific one or just something that sounds more intellectual than "You know, those PINWHEEL shaped ones"? The correct terminology is spiral galaxy. As for an example, the Milky Way is a barred spiral galaxy.
What is bigger the galaxy universe solar system?
No, the solar system is just the same give to the system of planets which orbit the Sun. There are millions of similar systems in this galaxy and there are millions of galaxies in the universe.
What is the surface of neutron star?
Let me see. Although theoretical, neutron stars do not retain the same plasma like properties of regular stars (which are nuclear powerhouses composed of plasma through a critical balancing act of fusion and gravity).
Neutron stars are almost entirely made up of highly compacted neutrons and typically have a solar mass of 1.35 to 2.1. The surface of a neutron star is composed of ordinary atomic nuclei crushed into a solid lattice with a sea of electrons dlowing through the gaps between them.
The surface is known to be a fluid which has been theorized to be a phenomena known as "super fluid" or a fluid which has no flow or viscosity. below the atmosphere is known to be an extremely hard yet smooth crust due to its gravitational field. It has also been discussed that the core of the neutron star also contains super fluid and has been theorized to contain a matter known as crystal carbonite.
Are quasars and active galaxies cosmic cannibals?
well actually all galaxies are active, and yes they do combine after a dance across the sky, and the center of the galaxies combine, I wouldn't call it eating though because all they do is combine with each other.
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The Andromeda galaxy is approaching our Galaxy at about 300 Km/s, and the collision between both galaxies will take place in about 4.5 billion years.
Andromeda galaxy is larger in both astronomical size and number of stars than the Milky Way, although Andromeda may not be the most massive, as recent findings suggest that the Milky Way may contain more Dark Matter, and so could be most massive than Andromeda (galaxy Messier 31 or National General Catalog 224).
Who will «eat» who?
Bets are accepted...
Why do scientist measure the distance from earth to near galaxies?
To measure the Doppler shift. This tells if the galaxies are moving towards us or away from us and a what rate. They want to see if the universe is slowing down its expansion or continuing to expand more rapidly. If its slowing down then eventually it would theoretically be able to collapse back on its self starting the whole process again. If not then the universe would just continue to expand. Either way they want to see whats happening.
How many galaxies do scientists believe exist in your universe?
NASA's estimates of how many planets are in the galaxy are probably horribly low. But based on the recent discoveries by the Kepler space telescope, it's likely that many, perhaps even most, star systems have one or more planets. Since there are somewhere between 500 billion and a trillion stars in the Milky Way (and perhaps far more than that!) it's likely that there are between 1 trillion and ten trillion planets in the galaxy.
However, it is literally impossible to ever know if this estimate was even close to accurate. It's a Wild-Eyed Guess!THIS IS NOT THE WRIGHT ANSWER!!!!!!!!!!!!!!!!
Why is your galaxy called the milk way?
The Greek word Galaxy is "milk". The name Milky Way Galaxy is derived from the way intra-galaxy dust and clouds appear as they stream across the night sky.
How many stars are in outer space and the galaxy?
Astronomers estimate that there is about a centillion (10^303) stars in the observable
Universe. That is to say the portion of the Universe that we can see. More than likely,
there are even more than that, but we are still counting.
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Answer #2:
I was in the neighborhood, happened to see Answer #1, and stopped in to say that
I have a problem with that number.
-- Estimates of the number of stars in the Milky Way (our galaxy) are in the range of
200-400 billion.
-- Compared to other galaxies that we can observe, the Milky Way (our galaxy) seems
to be bigger than average, and have more stars than average.
-- Estimates of the number of galaxies that we can see range up to maybe 100 billion.
Let's generate an unreasonably huge estimate of the total number of stars in the presently
observable universe ... one that we can be sure is too big. Let's assume that ...
-- The number of stars in the Milky Way (our galaxy) is at the highest end of the estimated
range ... 400 billion.
-- Instead of the Milky Way (our galaxy) being bigger than average, assume that every galaxy
has as many stars as the Milky Way (our galaxy) has ... 400 billion.
-- Instead of only maybe 100 billion galaxies, let's assume that there are as many other galaxies
as there are stars in every galaxy ... 400 billion.
Then the total number of stars would be (400 billion)2 = only a mere 1.6 x 1023, NOT 10303 .
And besides that ... How can Answer #1 start by saying "Astronomers estimate that . . ."
and then go on to say "More than likely there are even more than that ..." ? Who says ?
Another answer: I more or less agree with the previous answer. The estimate
I am familiar with is "about 1022 stars".
We can not take a photo of the Milky Way as if we were at some distance from it. However we do know that the Milky Way is a Bard Spiral Galaxy with, we believe, 4 distinct spiral arms. This information enables artists to depict what the Milky Way would look like form a distance but these depictions are not photographs.
Some good photographs of how the Milky Way looks from Earth are linked to below.
Which of the following types of galaxy is the Milky Way an example an example of?
Please don't write "the following" if you don't provide a list - it just doesn't make sense.The Milky Way is a spiral galaxy.
Which of these galaxies would you most likely find at the center of a large cluster of galaxies?
At the center of a large cluster, you'll usually find large and massive galaxies.
Where do galaxies get their names?
Some galaxies are named for the constellations they are in, like Andromeda. Some are named for a shape that they might, perhaps, resemble; the "Sombrero Galaxy", for example. More are not named as such, but are referred to by their Messier Catalog number.
Charles Messier was a French comet hunter; comets were all he really cared about. He built a very nice observatory to find comets, but kept finding these cloudy-looking, vaguely comet-like things that weren't comets. So he devised a catalog of these "Messier objects", things that looked a little like comets but were not.
Many of his "Messier objects" turned out to be galaxies, and we refer to them by number; for example the Andromeda Galaxy is M87.
