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Galactic Astronomy
AstronomyAstronomy: The scientific study of the Galaxies, Stars, Nebulae, Solar Systems and the Universe. It deals with a celestial object's relationship to the Earth, size, position, composition, motion, evolution and energy. Astronomers use telescopes, satellites, computers, space stations and observatories to study the universe.
Galaxy Evolution and Formation
: The study of galaxies and how they are created and change over time and space.
Science Cosomology Astrophysics The Universe Galaxy Evolutiona and Formation
Astronomy Extragalactic Astrophysics Universe Formation
Planetary Science Stars Cosmology Glossary
Solar System Stars Bioscience Cosmology Glossary
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Little Known Facts:
1. "The Milky Way galaxy is whirling rapidly, spinning our sun and all its other stars at around 100 million km per hour." Read More Amazing Space Facts
2. "The Sun travels around the galaxy once every 200 million years a journey of 100,000 light years."Read More Amazing Space Facts .
3. "There may be a huge black hole in the very middle of the most of the galaxies." Read More Amazing Space Facts.
4. "The Universe is probably about 15 billion years old, but the estimations vary." Read More Amazing Space Facts  Universe Today.
5. " The Milky Way is a disk about 120,000 light years across with a central bulge that has a diameter of 12,000 light years" Read More Universe Today  
6. "Scientists believe that 90% of our galaxy's mass consists of dark matter, which gives it a mysterious halo" Read More Universe Today.
7. "The word 'galaxy' is derived from the Greek word galaxias which means "milky", it is a reference to our own galaxy the Milky Way. Read More Science Kids.
8. "Any galaxy that has no obvious spiral or elliptical structure are called irregular galaxies. Some irregular galaxies would have just formed that way while others are the result of other galaxy types crashing into each other." Read More Science Kids .
9. "Our Milky Way Galaxy is part of a 'Local Group' of galaxies in which the galaxies move relative to each other. The Andromeda Galaxy is the largest galaxy of the Local Group, followed by the Milky Way and the Triangulum Galaxy, there are around 30 other smaller galaxies in the group" Read More Science Kids.  
10. "Galaxies often collide with each other. Usually, the stars within each will move past one and other due to the vast space between them. Any gas clouds and dust will interact, forming new stars. Gravity can pull the galaxies into new shapes, two spiral galaxies might join into a new elliptical, others produce bars, rings, or tails." Read More Science Kids.