Help appreciated!
♥ Kerry
2007-02-13 13:50:56 · 20 answers · asked by Kerry 2 in Science & Mathematics ➔ Astronomy & Space
No, the spiral shape galaxy is the most common shape of galaxy in the Universe.
Here is some well known examples:
- Milky Way
- Andromeda
- Whirlpool
- Triangulum
- Sunflower
Our galaxy, the Milky Way, has long been thought to be a spiral, with a Hubble sequence classification of Sbc (possibly SBb); recent research from the Spitzer Space Telescope, however, confirms that it is in fact a barred spiral.
A barred spiral galaxy is a spiral galaxy with a band of bright stars emerging from the center and running across the middle of the galaxy. Spiral arms appear to emerge from the ends of the "bar" in these galaxies, whereas they appear to emerge directly from the core in ordinary spiral galaxies.
2007-02-13 14:08:49 · answer #1 · answered by hyaki ikari 2 · 0⤊ 0⤋
Everything in space is rotating. There is no such thing as absolute rest or motion, (Newton's 1st law of motion). It's now thought that most, if not all large galaxies have super-massive black holes at their centers. How exactly they formed is still under investigation. If you have something with several million to a few billion solar masses at the core of a galaxy, with billions of solar masses worth of stars and gas orbiting it, it's intense gravitational field will consume everything that isn't moving fast enough to escape it's pull. It's the Law of Conservation of Angular Momentum that creates and maintains their spiral shape (look into Angular Momentum. It's very important for a good understanding of the processes your asking about) . Most, if not all, elliptical galaxies are the result of the merging of spiral galaxies. And both types grow by absorbing many small "dwarf galaxies". During the 1st few billion years, the universe was much smaller, and more crowded, so collisions were far more common than today. The Milky Way currently has, I believe, about 16 dwarf satellite galaxies. These galaxies orbit the core, the center of gravity of the system, passing through the plane of the galaxy at least once during a full orbit. Each time they do they have some of their stars stripped off, leaving long, looping trails of stars tracing out their orbit. Several of these star-streams and sometimes the main part of the dwarf have been discovered in the last few years, helping confirm the theory that galaxies are created from the "bottom - up" as opposed to the "top - down" theory that was prevalent for some time.
2016-05-24 08:09:11 · answer #2 · answered by Anonymous · 0⤊ 0⤋
No it isn't. There are other spiral galaxies in the Universe, and in fact, the galaxy of Andromeda is another example of a spiral galaxy. There are numerous spiral galaxies in the Universe.
2007-02-17 01:53:35 · answer #3 · answered by Tenebra98 3 · 0⤊ 0⤋
No. There are hundreds of billions of galaxies with hundreds of billions of stars in each. (That works out to 100,000,000,000,000,000,000+, or over one hundred SEPTILLION stars, just for fun.) Any way, there are millions upon millions of spiral galaxies, some of them being: the Circinus Galaxy, Dwingeloo 1, Andromeda, the Triangulum Galaxy, and the Whirlpool Galaxy.
2007-02-13 14:05:46 · answer #4 · answered by Anonymous · 0⤊ 0⤋
spiral shaped galaxies like the milky way are common in the universe,
2007-02-13 14:39:29 · answer #5 · answered by blinkky winkky 5 · 0⤊ 0⤋
No that is a Helix,In mathematics, a helix is a curve in 3-dimensional space. The following three equations in rectangular coordinates define a helix:
x = cos (t)
y = sin (t)
z = t kB). Add Image to Favorite List, 2005-05-05, Helix Nebula ...
photojournal.jpl.nasa.gov/gallery/universe?order=Instrument&sort=ASC&start=70 - 24k - Cached - Similar pages
/Check out those Helix galaxies
2007-02-13 14:45:33 · answer #6 · answered by Faerie loue 5 · 0⤊ 0⤋
No. There is a spiral galaxy nearby known as M31, or the Andromeda Galaxy. It is by far the largest galaxy in our local cluster of galaxies. Ours is the second biggest in our cluster.
Check out the hubble deep field and ask yourself if our /anything/ is the only one out there.
http://images.google.com/images?q=deep%20field&ie=UTF-8&oe=UTF-8&sa=N&tab=wi
2007-02-13 13:56:11 · answer #7 · answered by Anonymous · 0⤊ 0⤋
There are an estimated 100,000,000,000 galaxies in our universe, and a considerable proportion are spiral galaxies, many billions, for sure.
2007-02-13 16:43:20 · answer #8 · answered by CLICKHEREx 5 · 0⤊ 0⤋
There are billions of spirals galaxies out there.
2007-02-13 13:53:50 · answer #9 · answered by Anonymous · 1⤊ 0⤋
No. Andromeda (the galaxy closest to ours) is a spiral as well.
http://en.wikipedia.org/wiki/Andromeda_Galaxy
2007-02-13 13:54:10 · answer #10 · answered by Peanut Butter 5 · 0⤊ 0⤋