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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
How does the structure of the Milky Way Galaxy change over time?
The stars in the spiral arms gradually rotate around the galactic nucleus
What did many astronomers believe about galaxies in the 1920s?
Among other things, that they were static in space
Why is Milky way called spiral galaxy?
Because of the spirals. Suggestion: Search (for example, in Google Images, or perhaps in the Wikipedia) for "spiral galaxy", to get an idea what a spiral galaxy looks like.
What gravity does to a galaxy?
Well gravity's job is to attract objects to one another. Its like the cupid of objects. So basically inside a galaxy gravity will attract each and everything together. So everything starts to coalesce into a huge ball of light that contains billions of stars and dust with a black hole at the core of the huge lump.
Do dozens of dwarf galaxies merge and form into a giant elliptical galaxy?
Not just dwarf galaxies. Giant elliptical galaxies lie likely the result of many galaxies, small and large, merging.
The Milky Way is real and has 400 billion star and is 120,000 light years across.
Are quasars the most unusual type of active galaxy?
Quasars are the unusual type of active galaxy in the universe.
Spiral galaxies
What if your universe met with a parallel universe?
If there is such a thing as a parallel universe, and if it's not already
located near and parallel to our universe, and if it's located in some
other place, and if our universe and the parallel one are moving toward
each other, and if there's such a thing as them meeting each other, then
nobody has any idea what would happen in that event.
Where can one purchase a spiral ham?
A spiral cut ham can be purchased at most local supermarkets, box stores and from specialty retailers. Supermarkets like SaveMart, Trader Joe's, Foods Co. or Albertsons, box stores like Sams Club, Costco or Smart & Final, and finally, specialty outlets like Honey-Baked or Smithfield. Stores carry spiral cut hams all year long but stock up for holidays.
When a number of cluster of galaxies join together they form a of galaxies?
That's called a supercluster.
What is the importance of a galaxy?
Galaxies can not be classified or defined regarding to its importance. All elements that make part of the Universe are important simply because they exist, and for some motive that only God knows they are there.
Wikipedia
says that >"A galaxy is a massive, gravitationally bound system consisting of stars, stellar remnants, and interstellar medium of gas and dust, and, it is hypothesized, an important but poorly understood
component called dark matter".
Well, if a galaxy is still poorly understood..... We live in a galaxy, obviously it is important, otherwise we couldn't have a place to live.
What other galaxies do you know?
First, one from the lighter side of life: the Ford Galaxie (it's a car!).
Okay, here's another: Messier than you, the Messier 82 (actually, a 'nearby' starburst galaxy [12 million light years away!] in the Ursa Majorconstellation).
The closest galaxy to our own is the Canis Major Dwarf.
The first found (in 1923, by Edwin Hubble) are the Andromeda Galaxy and the Milky Way Galaxy. Hubble determined that they were two separate galaxies (so far).
Okay, so then there's Cygnus A, Malin 1, Omega Centauri, and the Whirlpool Galaxy.
There really are many more, but these are the easiest for me to remember because they actually have names, instead of numbers.
See the related Wikipedia link listed below for more information:
The direct center of the galaxy varies constantly based on the movement of planets, stars, and celestial objects. The center of most galaxies is based on a large star or planet but may simply be an open space.
What do astronomers think is hiding in the middle of the core galaxy?
A black hole or a worm hole :) good luck
What things are in the solar system and milky ways and planets?
Comets, solar flares, asteriod belt, stars
Why do stars move in the Galaxy for what force?
The revolution of stars about the center of the galaxy is like that of planets around the sun, only in a larger scale. The motion is caused by angular momentum (which derives ultimately from the Big Bang) and the stars are prevented from flying off in all directions by the gravitational field of the galaxy.
Why are some galaxies coming together?
Some galaxies are bound together gravitationally into what is called Local Groups.
Because of the gravitational attraction between them they are approaching each other.
