what is the shape of our galaxy
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Galaxy Our own galaxy, the Milky Way, is a large disk-shaped barred-spiral galaxy about 30 kiloparsecs in diameter and a kiloparsec thick. It contains about two hundred billion (2×1011) stars and has a total mass of about six hundred billion (6×1011) times the mass of the Sun.
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Milky Way The term Milky Way is a translation of the Latin via lactea, from the Greek γαλαξίας κύκλος (galaxías kýklos, milky circle). From Earth, the Milky Way appears as a band because its disk-shaped structure is viewed from within. Galileo Galilei first resolved the band of light into individual stars with his telescope in 1610.
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Chapter 26 Stars and Galaxies Most common type, most of these are dwarf galaxies (too small and too dim to be easily seen). Shaped like large, 3-dimensional ellipses (football shaped). Giant elliptical galaxies can be over 9 million light-years across and contain trillions of stars.. Dwarf elliptical galaxies- only about 3,000 light-years across and contain fewer than a million stars. Most contain little gas and dust and cannot make new stars. Irregular galaxies can take many different shapes and contain 100 million to 10 billion stars, Less common than elliptical or spiral. a. Larger than Dwarf ellipticals but smaller than spiral galaxies. a galaxy that does not have a regular shape, typically smaller than other types or galaxies, generally have bright, young stars and lots of gas and dust to form new stars.
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Milky Way The Milky Way is a barred spiral galaxy and is part of the Local Group of galaxies. Ours is merely is one of billions of galaxies in the observable universe. Our sun is 25,000 light years from the center of the Milky Way. The oldest star in the galaxy is 13.2 billion years old. The stellar disk of the Milky Way Galaxy is approximately 100,000 light years in diameter and is about 1,000 light years thick. It is estimated to contain up to 400 billion stars. The exact figure depends on the number of very low-mass stars, which is difficult to determine.
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Galactic Center The nature of the Milky Way's bar, which extends across the Galactic Center, is also actively debated, with estimates for its half-length and orientation spanning between 1–5 kpc (short or a long bar) and 10–50°. Certain authors advocate that the Milky Way features two distinct bars, one nestled within the other.
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What Is a Satellite Galaxy? What Is a Satellite Galaxy? Our sun is part of a massive collection of stars in the Milky Way galaxy. These hundreds of billions of stars orbit the galaxy’s center. But did you know that there are things that are even bigger orbiting the Milky Way’s center? Other galaxies orbit it too!
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- A new, distant arm of the Milky Way galaxy June 13, 2011, Harvard-Smithsonian Center for Astrophysics The Milky Way's basic structure is believed to involve two main spiral arms emanating from opposite ends of an elongated central bar.
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- It's a big flat disk of stars measuring up to 120,000 light years across. Our Solar System is located in the middle of this galactic disk. And by the middle, I mean the center of the galaxy is about 27,000 light years that way, and the edge of the galaxy is about the same distance that way.Our Milky Way is but one galaxy in a larger collection of galaxies known as the Local Group.ou, me and the Earth are all located inside our Solar System. Which contains the Sun, 8 planets and a vast collection of ice, rocks and dust. We're embedded deep within our galaxy, the Milky Way.
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Milky Way The Milky Way is our galaxy - the galaxy we are part of. The Sun and therefore the Earth are found close to the inner rim of the Galaxy's O…rion Arm, in the Local Fluff inside the Local Bubble, and in the Gould Belt, at a distance of about 25,000 light years from the Galactic Center.
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- SPIRAL GALAXIES - A galaxy that has a distinct nucleus and one or more spiral arms. The arms extend outward from the nucleus and are composed of stars, dust, and gas. Population I stars are found in the arms and Population II in the nucleus, between arms and probably in the halo. Population I are considered younger stars.
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What shape is a star really? Report Abuse. The Sun is a typical star: basically a sphere of very hot plasma. Because of its rotation it is slightly oblate: fatter at the equator than pole-to-pole. Larger stars with faster rotation periods are more oblate, but that's the basic shape for all stars. GeoffG · 6 years ago.
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Shape of the universe Shape of the observable universe. Main article: Observable universe. See also: Distance measures (cosmology) As stated in the introduction, there are two aspects to consider: its local geometry, which predominantly concerns the curvature of the universe, particularly the observable universe, and.
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Cartwheel of Fortune Product Description. By chance, a collision of two galaxies has created a surprisingly recognizable shape on a cosmic scale - The Cartwheel Galaxy. The Cartwheel is part of a group of galaxies about 400 million light years away in the constellation Sculptor (two smaller galaxies in the group are visible below and left). Its rim is an immense ring-like structure over 100,000 light years in diameter, composed of star forming regions filled with extremely bright, massive stars.
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What is the Closest Galaxy to the Milky Way? It has a roughly elliptical shape and is thought to contain as many stars as the Sagittarius Dwarf Elliptical Galaxy, the previous contender for closest galaxy to our location in the Milky Way. In addition to the dwarf galaxy itself, a long filament of stars is visible trailing behind it.
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Solar System The Milky Way is a barred spiral galaxy and is part of the Local Group of galaxies. Ours is merely is one of billions of galaxies in the observable universe. Our sun is 25,000 light years from the center of the Milky Way. The oldest star in the galaxy is 13.2 billion years old. The stellar disk of the Milky Way Galaxy is approximately 100,000 light years in diameter and is about 1,000 light years thick. It is estimated to contain up to 400 billion stars.
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X Marks the Spot for Milky Way Formation But it was the Milky Way's appearance in the tweets that got the attention of other astronomers. Some chimed in about the appearance of the bulge, a football-shaped central structure that is three-dimensional compared to the galaxy's flat disk.
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spiral galaxy ◇ A spiral galaxy whose central bulge has the shape of a bar from whose ends the spiral arms emanate is called a barred spiral galaxy. About a third of spiral galaxies have this straight or lozenge-shaped bar of stars, gas, and dust extending out from the nucleus.
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Types of Galaxies Spiral galaxies are the most common type in the universe. Our Milky Way is a spiral, as is the rather close-by Andromeda Galaxy. Spirals are large rotating disks of stars and nebulae, surrounded by a shell of dark matter. The central bright region at the core of a galaxy is called the “galactic bulge”.
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Spiral Galaxies The most common type of galaxy is called a spiral galaxy.. Not surprisingly, spiral galaxies look like spirals, with long arms winding toward a bright bulge at the center.
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GALAXY One theory says that galaxies were born when vast clouds of gas and dust collapsed under their own gravitational pull, allowing stars to form. The other theory, which has gained strength in recent years, says the young universe contained many small lumps of matter, which clumped together to form galaxies. According to this theory, most of the early large galaxies were spirals. But over time, many spirals merged to form ellipticals.
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- Our home lies within the disk of the Milky Way. It's the disk where most of the galaxy's gas and dust is located. As a result this is where most new stars are being born. Just as the Earth has an equator, so too does the galaxy and we are about 14 light years above what's called the equatorial symmetry plane.
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- The disk is a flattened region that surrounds the bulge in a spiral galaxy. The disk is shaped like a pancake. The Milky Way's disk is 100,000 light years across and 1,000 light years thick. It contains mostly young stars, gas and dust, which are concentrated in spiral arms.